Contents: Landscape & Visual Impacts
10.2 Legislation,
Standards & Guidelines
10.4 Review of
Literature on the Appearance of Wind Turbines in the Landscape
10.5 Baseline
Conditions and Visual Sensitive Receivers
10.6 Landscape
Impact Assessment
10.8
Conclusions
10.1.1
Background
10.1.1.1 Wind turbines in the landscape are a relatively recent phenomenon and the ways in which people perceive their visual effect has only recently become clear. In particular both the functional aspects of their form and the symbolic meaning of wind turbines may be fundamentally different to other types of development and this in turn may affect the extent to which people perceive that they may be appropriate / acceptable in the landscape.
10.1.1.2 Such perceptions are discussed in this Section as part of the technical assessments of landscape and visual impacts associated with proposed development of an offshore wind farm in the south-eastern waters of the HKSAR.
10.1.2
Objectives
10.1.2.1 Clause 2(vi) of the EIA Study Brief (ESB) states that a core objective of this EIA Study Report is to, “identify and quantify any potential landscape and visual impacts and to propose measures to mitigate these impacts”.
10.1.2.2 Specifically, Section 3.4.4 of the ESB requires an assessment of both the construction and operational phase impacts of the Project. Accordingly, this assessment includes:
·
Definition of the scope and
contents of the study, including a description of the assessment methodology
·
Review of relevant planning and
development control framework
·
Review of literature on
established public preference with regard to the appearance of wind turbines in
the landscape and also a literature review of professional opinion on the
appearance of power generation facilities in the landscape
·
Baseline study providing a
comprehensive and accurate description of the baseline landscape and visual
character
·
Identification of the potential
landscape and visual impacts and prediction of their magnitude and potential
significance, before and after mitigation measures
· Recommendation of appropriate mitigation measures and associated implementation programmes.
10.2
Legislation, Standards & Guidelines
10.2.1.1 The following legislation, standards and guidelines are potentially applicable to the assessment of landscape and visual impacts associated with the construction and operation of the Proposed Hong Kong Offshore Wind Farm in South-eastern Waters Project:
·
Environmental Impact Assessment
Ordinance (Cap.499.S.16) and the Technical Memorandum on EIA Process (EIAO TM),
particularly Annexes 10, 11 and 18
·
EIAO Guidance Note 8/2002
·
· Town Planning Ordinance (Cap 131);
· Forests and Countryside Ordinance (Cap. 96) and its subsidiary legislation the Forestry Regulations;
· Country Parks Ordinance (Cap 208);
· Marine Parks Ordinance (Cap 476) and associated subsidiary legislation;
· Study on South East New Territories Development Strategy Review: Landscape and Conservation Framework;
· Territorial Development Strategy Review: 1995.
10.3.1
Limits of the Assessment Area
10.3.1.1 The limit of the landscape impact study is 500m beyond the limit of the Works (Figures 10.3 and 10.4). The limits of the visual impact study are the Primary Visual Envelope of the works, which is illustrated in Figures 10.7a and 10.7b.
10.3.2.1 Landscape and visual impacts have been assessed separately for the construction and operational phases.
10.3.2.2 The assessment of landscape impacts has involved the following procedures:
· Identification of the baseline physical landscape resources and landscape character found within the Assessment Area. This is achieved by site visit and desktop study of topographical maps, information databases and photographs.
· Assessment of the degree of sensitivity to change of the landscape resources and Landscape Character Areas. This is influenced by a number of factors, including rarity, quality, conservation status and importance, the presence statutory or regulatory limitations, maturity of the resource and the ability of the resource / character to recover or be recreated. The sensitivity of each landscape resource and character area is classified as follows:
High: |
Important landscape or landscape resource with particularly distinctive positive aspects of character or high rarity value, sensitive to relatively small changes. |
Medium: |
Landscape or landscape resource with moderately distinctive positive aspects of character or rarity value reasonably tolerant to change. |
Low: |
Landscape or landscape resource common across |
· Identification of potential sources of landscape impact. These are the various elements of the construction works and operational procedures that will produce changes to the landscape.
· Identification of the magnitude of landscape impact. Impact magnitude depends on various factors, including physical extent and context of the impact, project compatibility with the surrounding landscape, and impact frequency, duration and reversibility. Landscape impacts have been quantified wherever possible. The magnitude of landscape impacts is classified as follows:
Large: |
The landscape or landscape resource would experience a major change; |
Intermediate: |
The landscape or landscape resource would experience a moderate change; |
Small: |
The landscape or landscape resource would experience slight or barely perceptible changes; |
Negligible: |
The landscape or landscape resource would experience no discernible change. |
· Identification of potential landscape mitigation measures. Such measures may include adopting an alternative design and / or layout, use of remedial measures such as colour and textural treatment, and measures to compensate unavoidable adverse impacts. A programme to implement mitigation measures has been provided. The agencies responsible for the funding, implementation, management and maintenance of the mitigation measures are identified and their approval-in-principle has been sought.
· Prediction of the significance of landscape impacts before and after the implementation of the mitigation measures. By synthesizing the magnitude of the various impacts and the sensitivity of landscape resources it is possible to categorize impacts in a logical, well-reasoned and consistent fashion. Table 10.1 displays a matrix categorizing impact significance according to project impact magnitude and sensitivity of landscape resource/character. The impact significance thresholds are defined as follows:
Substantial: |
Negative / positive impact where the proposal would cause a very noticeable deterioration or improvement to existing landscape resources / character. |
Moderate: |
Negative / positive impact where the proposal would cause a noticeable deterioration or improvement to existing landscape resources / character. |
Slight: |
Negative / positive impact where the proposal would cause a barely perceptible deterioration or improvement to existing landscape resources / character. |
Insubstantial: |
No discernible change to existing landscape resources / character. |
· Prediction of Acceptability of Impacts. An overall assessment of the acceptability, or otherwise, of the impacts according to the five criteria set out in Annex 10 of the EIAOTM.
|
Large |
Moderate |
Moderate
/ Substantial |
Substantial |
Magnitude
of Impact |
Intermediate |
Slight
/ Moderate |
Moderate |
Moderate
/ Substantial |
Small |
Insubstantial
/ Slight |
Slight
/ Moderate |
Moderate |
|
Negligible |
Insubstantial |
Insubstantial |
Insubstantial |
|
|
|
Low |
Medium |
High |
|
|
Receptor
Sensitivity (of Landscape Resource, Landscape Character
Area or VSR) |
10.3.2.3 The assessment of visual impacts has involved the following procedures.
· Identification of the Visual Envelope for the Hong Kong Offshore Wind Farm in South-eastern Waters project. This has been achieved primarily through the use of computer modelling (‘Windfarm’ software developed by Resoft) and reconfirmed by site visit to determine visibility of the Project from various locations.
· Identification of the Visually Sensitive Receivers (VSRs) within the Primary Visual Envelope. These are the people who would reside within, work within, play within, or travel through, the Primary Visual Envelope.
· Assessment of the degree of sensitivity to change of the VSRs.
10.3.2.4 The sensitivity of VSRs (those who will see the change in the landscape) is classified as follows:
High: |
The VSR is highly sensitive to any change in their viewing experience. |
Medium: |
The VSR is moderately sensitive to any change in their viewing experience. |
Low: |
The VSR is only slightly sensitive to any change in their viewing experience. |
· VSRs are grouped and their sensitivity classified according to whether the person is at home, at work, at play, or travelling. Those who view the impact from their homes are considered to be highly sensitive, as the attractiveness or otherwise of the outlook from their home will have a substantial effect on their perception of the quality and acceptability of their environment and their general quality of life. Those who view the impact from their workplace are of low sensitivity as the attractiveness or otherwise of their outlook will have a less important effect on their perception of their quality of life. Those who view the impact whilst taking part in an outdoor leisure activity may display varying sensitivity depending on the type of leisure activity (for example, hikers will have a higher sensitivity than those playing football). Those who view the impact whilst travelling on a public thoroughfare will generally have a medium sensitivity, with passengers being more sensitive than drivers of vehicles (who are concentrating on navigating and controlling their vehicle).
·
Identification of the relative
numbers of VSRs. This is expressed in
terms of whether there are very few, few, many or very many VSRs in any one
category of VSR. These terms are defined
by size of a VSR group in
· Identification of potential sources of visual impacts. These are the various elements of the construction works and operational procedures that would generate visual impacts.
· Assessment of the potential magnitude of visual impacts. Factors considered include:
a) Duration and reversibility of the impact;
b) Changes in the character of existing views;
c) Distance of the source of impact from the viewer; and
d) Degree of visibility of the impact (partial, full, glimpse).
10.3.2.5 The magnitude of visual impact is classified as follows:
Large: |
The VSRs would experience a major change in the character of their viewing experience. |
Intermediate: |
The VSRs would experience a moderate change in the character of their viewing experience. |
Small: |
The VSRs would experience a minor change in the character of their viewing experience. |
Negligible: |
The VSRs would experience no discernible change in the character of their viewing experience. |
· Identification of potential visual mitigation measures. Such measures may include adopting an alternative design and / or layout, use of remedial measures such as colour and textural treatment, and measures to compensate unavoidable adverse impacts. A programme to implement mitigation measures has been provided. The agencies responsible for the funding, implementation, management and maintenance of the mitigation measures are identified and their approval-in-principle has been sought.
· Prediction of the significance of visual impacts before and after the implementation of the mitigation measures. By synthesizing the magnitude of the various impacts (changes in view) , the sensitivity of the VSRs, and the number of affected VSRs, it is possible to categorize impacts in a logical, well-reasoned and consistent fashion. Table 10.1 displays a matrix categorizing impact significance according to the magnitude of impact (change), and sensitivity of affected VSRs. Consideration is also given to the relative numbers of affected VSRs in predicting the final impact significance - exceptionally low or high numbers of VSRs may change the result that might otherwise be concluded from Table 10.1. The significance of the visual impacts is categorised as follows:
Substantial: |
Negative / positive impact where the proposal would cause significant deterioration or improvement in existing visual character perceived by the general population. |
Moderate: |
Negative / positive impact where the proposal would cause a noticeable deterioration or improvement in existing visual character perceived by the general population. |
Slight: |
Negative / positive impact where the proposal would cause a barely perceptible deterioration or improvement in existing visual character perceived by the general population. |
Insubstantial: |
No discernible change in the existing visual character perceived by the general population. |
· Prediction of Acceptability of Impacts. An overall assessment of the acceptability, or otherwise, of the impacts according to the five criteria set out in Annex 10 of the EIAOTM.
10.3.2.6 In addition, the following assumptions have been made in the assessment:
·
All mitigation proposals in
this report are practical and achievable within the known parameters of
funding, implementation, management and maintenance. The suggested agents for the funding and
implementation (and subsequent management and maintenance, if applicable) are
indicated in Tables 10.2 and 10.3.
10.3.3
Planning and Development Control Framework
10.3.3.1 A review has been undertaken of the current landscape planning goals and objectives and landscape planning designations for the Assessment Area.
10.3.3.2 As the Study Area is in offshore waters, there are no Outline Zoning Plans that cover the Study Area.
10.3.3.3 The Study Area falls outside the area designated as a Potential Marine Conservation Area under the ‘Landscape and Conservation Framework’ of the Study on the South East New Territories Development Strategy Review’ and is not covered by any particular landscape strategy under that document (Figures 10.1a and 10.1b).
10.3.3.4
The Study Area falls outside
the area designated as a Potential Site for
The Study Area falls outside the area designated as an Inshore Protection Area under the ‘Landscape Strategy Components’ of the Territorial Development Strategy Review – 1995 and is not covered by any particular landscape strategy under that document (Figures 10.2a and 10.2b).
10.4
Review of Literature on the Appearance of Wind Turbines in the
Landscape
10.4.1
Public Perception Research on the Appearance of Wind Turbines
10.4.1.1
Over approximately the last 20
years, a variety of surveys have been conducted to determine the reaction of
the public to wind turbines. These
surveys, carried out in the
10.4.1.2
The independent NOP ‘Wind
Tracker’ Poll conducted annually on some 1,000 adults in the
· 62% of respondents did not consider wind farm appearance as being important;
· 56% of respondents would be happy to have a wind farm in their area and
· 21% of respondents had no strong views on the issue.
10.4.1.3
The UK Government (DTI)
surveyed local residents after completion of a wind farm project in
10.4.1.4
A survey of some 1,000 people
conducted by Populus in the
10.4.1.5
The Government body,
Countryside Council for
10.4.1.6
Further interesting findings
have been revealed by a Mori Poll in 2003 which showed that when respondents in
10.4.1.7 Indeed, to reinforce the point above Revie and Stein have reviewed all available public preference surveys into wind farms and concluded that “To date, every survey of public opinion taken after construction has shown a considerable majority in favour of a wind farm” (Revie and Stein, 1997, p.49).
In a survey
carried out by the Delaware College of Marine and Earth Studies,
10.4.1.8
Thayer and Freemen, (1987)
carried out research surveys into a proposed wind farm at Altamont in
· Use of neutral colours for turbines;
· Evenly spaced arrays of turbines;
· Consistency in turbine type and size within arrays;
· Use of fewer, larger turbines in preference to the use of more smaller ones; and
· Minimization of conspicuously malfunctioning turbines – turbines look more acceptable when they are operating.
10.4.1.9
This research has since proven
to be fairly accurate and modern wind farms are designed in accordance with the
principles established by Thayer and Freemen. Overall, surveys of wind farm
perception from the
· Typically 50-70% of respondents have no adverse feelings on the visual appearance of wind farm developments after construction; and
· There is a preference for consistency of size, formal layout and maximum turbine size as opposed to multiplication of smaller sized turbines.
10.4.2
Professional Approaches to the Appearance of Wind Turbines in the
Landscape
10.4.2.1 Professional consensus amongst Landscape Architects and those involved in the field of landscape aesthetics has identified a number of key principles with regard to the visual appearance of large engineering structures in the landscape.
10.4.3
The Relationship between Landscape and Large Structures
10.4.3.1
It is widely acknowledged in
the field of Landscape and Visual Impact Assessment that there is no necessary correlation between a man-made
development per se and visual impact.
Neither is there a necessary
correlation between the size of a structure and the magnitude of impact (or
the significance of that impact). What
is widely recognised as being important, is that the development should
correspond to the visual characteristics and components of the landscape in
which it sits (Crowe, p17).
10.4.4
Principles for the Siting and Design of Large Structures in the Landscape
10.4.4.1 Scale: The eminent UK Landscape Architect, Sylvia Crowe wrote a seminal book on the effect of power generation infrastructure on the landscape, ‘The Landscape of Power’ – which is as valid today as it was when it was written. In it, she states that it is important that when siting large landscape structures in the landscape they be of scale that responds to the scale of other features in the landscape. Therefore, large structures are more appropriate in landscapes dominated by large-scale features (e.g., lakes and mountains). When dealing with large power generation structures in the landscape, Crowe states that it is important to maintain a “zone of simplicity” (Crowe, p46) which is a zone between the viewer and the structure which does not contain features of a human scale which will accentuate the scale of the structure. If the “zone of simplicity” is maintained, then large structures will not appear out of scale.
10.4.4.2 Design of Structures in the Landscape: Sylvia Crowe also states that “Once a structure exceeds 100ft, rising above the tallest trees, the effect on the landscape of any further increase in height is far less important than an increase in bulk”. When considering the relationship of power generation infrastructure to the landscape, Crowe states that the ”feeling of detachment generated by a structure that floats or rests lightly on the ground, suggest one of the answers to the problem of reconciling machines and the landscape” (Crowe, p49).
10.4.4.3 Relationship of Forms to Function: Sylvia Crowe believes that power generation structures may, in certain cases, become gradually accepted as a natural part of the landscape, provided that their form expresses their purpose rather than being an attempt to disguise it. She states that, “probably the human eye will gradually become accustomed to the new shapes which embody processes of thought and translate into visible, physical forms, the pattern of universal laws. But this will happen only if the shapes truly represent these laws and do not masquerade as enlarged habitations of the human body.” (Crowe, p17).
10.4.4.4
Sensitivity / Capacity of Seascape:
Certain landscapes / seascapes may be more appropriate than others for the
location of large, power generating structures.
The
10.4.5
The Potential Positive Visual Impacts of Wind Turbine Structures
10.4.5.1 In the context of wind power, across the world, wind turbines have not only been repeatedly found to be acceptable in visual terms, but in some cases have been found to enhance the landscape.
10.4.5.2
In the
10.4.5.3 “With a sympathetic colour scheme, [the turbines] would be visually in keeping with this designated area and would enhance the view. The scheme would emphasise the sense of space and distance that is so characteristic of this…landscape. The proposal would not detract from the landscape character of the area in purely visual terms, rather it would, in my view complement it” (cited in Planning Application for the proposed St Breock Wind Farm, Environmental Statement (2002), p9).
10.4.5.4
Similarly, a local district
councillor speaking for a local community in
10.4.5.5 “The Ardrossan wind farm has been overwhelmingly accepted by local people – instead of spoiling the landscape we believe it has been enhanced. The turbines are impressive looking [and] bring a calming effect to the town…” (cited in BWEA.com).
10.4.5.6 US Landscape Architect Robert Thayer states in his seminal work ‘Gray World, Green Heart: Technology, Nature and the Sustainable Landscape’ that viewers ascribe cultural and symbolic value to technological features in the landscape. Reviewing the results of a case study at the Montezuma Hills Wind Farm, Solano County California, he states that wind turbines have a positive visual association because their form is directly related to a sustainable function (i.e. the generation of clean renewable energy). He states that “This rather direct expression of function serves to reinforce wind energy’s sense of landscape appropriateness, clarity and comprehensibility. In the long run, wind energy will contribute highly to a unique sense of place” (Thayer, 1994).
10.4.6
Conclusions
10.4.6.1 Combined evidence from research into public perception of the appearance of wind farms and professional opinion suggests the following principles:
· A majority of people living close to wind farms believe wind turbines make no negative impact on the landscape (cited in BWEA and Windworks.org);
· People generally find wind turbines more acceptable when they see them, than when they try to imagine them (Mori cited in BWEA) and a majority ultimately are in favour of the wind farm (Revie and Stein). They may become habituated to new or novel forms in the landscape where these forms possess a simple integrity (Crowe);
· People prefer turbines of a consistent size and formal layout (Thayer);
· Turbine size should be maximised in preference to a multiplication of smaller turbines (Thayer);
· Large structures should be sited in landscapes where they are well away from smaller structures, so that their scale is not emphasised. A “zone of simplicity should be maintained” (Crowe);
· Tall, slender structures with a small interface with the landscape and which seem to “float” on it are more preferable to low bulky structures (Crowe);
· People find wind turbines more acceptable than other power generation structures due to the relationship of their form to their function and because of their psychological associations with clean, sustainable energy (Crowe and Thayer);
· Coastal offshore landscapes are suitable for the location of large structures due to their size and scale and the fact that they are remote from large numbers of visual receivers (Maritime Institute for Ireland & Countryside Council for Wales);
· With regard to offshore windfarms, more people view visible turbines as a visual attraction than those who see them as being deterrent features (University of Delaware College of Marine and Earth Studies);
·
There is some opinion that wind
farms may result in positive visual impacts both through contributing to a
sense of place and also due to their positive perceptual connotations with
sustainable energy (Thayer, DTI cited in Windworks.org).
10.5
Baseline Conditions and
Visual Sensitive Receivers
10.5.1
Physical Landscape Resources
10.5.1.1 Being a marine site, the landscape resources that will be affected by the Project are limited to the offshore waters themselves. There are no islands or landmasses within the Study Area.
10.5.1.2 The offshore waters that will be affected during the (Pre) Construction Phase and Operational Phase, together with its sensitivity to change, are described below.
10.5.1.3 The locations of the offshore waters are mapped in Figure 10.3. Photo-views illustrating them are provided in Figures 10.5 and 10.6. For ease of reference and co-ordination between text, tables and figures the landscape resource is given an identity number (LR1).
10.5.1.4
LR1 – Offshore Waters – this resource
consists of an extensive body of offshore water lying off the coast of Hong
Kong extending as far as the boundary of Hong Kong Territorial Waters.
10.5.2
Landscape Character Area
10.5.2.1
One landscape character area
(LCA) covers the entire Study Area. This
was identified in Planning Department’s Landscape Value Mapping Study (2005)
and is described below. The location of
the character area is indicated on Figure 10.4. Photographs showing the character of the LCA
are provided in Figures 10.5 and 10.6. For ease of reference and co-ordination
between text, tables and figures, the Landscape Character Area is given the
identity number, LCA1.
LCA1 –
10.5.2.2
This landscape comprises an
extensive, homogenous area of offshore water off the east coast of the
10.5.2.3
It consists predominantly of
the water itself as well as a number of small rocky islands scattered
throughout them typically rising to no more than 50mPD. These include Cheung Tsui Chau;
10.5.2.4
Islands within this LCA but
beyond the limits of the study area include High Island, Tai Long Wan, Sharp
Island, Ninepin Group, Wang Chau,
10.5.2.5 This is a very extensive landscape and so changes to it are likely to be small in magnitude. However, it is also a landscape, which by virtue of its openness and simplicity has a high sensitivity to change.
10.5.3.1 The Visual Envelope for the Project will be largely similar during the (Pre) Construction Phase and Operational phase, as there will be no especially tall temporary machinery or structures associated with construction works.
10.5.3.2 For the purposes of the Study, the Visual Envelope is divided into a Primary Visual Envelope and a Secondary Visual Envelope. The Primary Visual Envelope is that area within 15km of the Project from which it can be seen. Although in a small number of cases, there will be a direct line of sight to the Project from areas beyond this distance, the effects of distance will mean that any visual impacts are not significant.
10.5.3.3 Given the marine location of the Project, the Visual Envelope will be large, with intervening landforms defining it only to the north-west, west and south west. The Primary Visual Envelope is described below and is mapped in Figures 10.7a and 10.7b.
10.5.3.4
To the north and north-west,
the Primary Visual Envelope covers the shore of the south-east
10.5.3.5
To the west, the Primary Visual
Envelope extends as far as the spit of land separating Inner Port Shelter from
Hebe Haven, as well as the mouth of Hebe Haven itself. Turbines will be visible along part of the
east of
10.5.3.6
To the south and southwest, the
Primary Visual Envelope includes extensive areas of offshore water as far as
10.5.3.7 Finally, to the south and east, the Primary Visual Envelope includes areas of offshore water as far as the boundary of Hong Kong SAR territorial waters.
10.5.4
Visually Sensitive Receivers (VSRs)
10.5.4.1 Within the Primary Visual Envelope for the (Pre) Construction and Operational Phases, key Visually Sensitive Receivers (VSRs) have been identified. These VSRs are mapped in Figures 10.8a and 10.8b. They are listed below, and also, together with their sensitivity, in Table 10.5. The views currently experienced by VSRs are shown in Figures 10.9a, 10.9b, 10.10a, 10.10b, 10,11a, 10.11b, 10.12a, 10.12b, 10.13a, 10.13b, 10.14a, 10.14b, 10.15a, 10.15b, 10.16a, 10.16b, 10.17a, 10.17b, 10.18a, 10.18b, 10.19a, 10.19b, 10.20a, 10.20b. For ease of reference, each VSR is given an identity number, which is used in the text tables and figures.
Recreational Visually Sensitive Receivers
10.5.4.2 Recreational VSRs are as follows:
· R1 Visitors / Hikers on Tung Lung Chau
· R2 Recreational Boat Users west of Project (>5km and <10km)
·
R3 Users of
· R4 Hikers on High Junk Peak Trail
·
R5 Users of
·
R6 Users of Little
·
R7 Users of
· R8 Recreational Boat Users in Port Shelter (>10km and <15km)
· R9 Recreational Boat Users in Rocky Harbour (>5km and <10km)
· R10 Users of Kau Sai Chau Golf Course
· R11 Users of HK Sea Cadet Corps Nautical Centre
·
R12 Users of
· R13 Users of Long Ke Wan Bay and Beach
·
R14 Users of
·
R15 Hikers on Sai Wan
· R16 Users of Pak Lap Wan Bay and Beach
· R17 Users of Tai Long Wan Bay and Beach
·
R18 Hikers on
· R19 Recreational Boat Users north of Project (>5km and <10km)
· R20 Recreational Boat Users north of Project (>10km and <15km)
· R21 Recreational Boat Users >5km and <10km of Project
·
R22 Users of
· R23 Visitors to Proposed Geological Park <5km from Project
· R24 Visitors to Proposed Geological Park >5km and <10km from Project
Travelling Visually Sensitive Receivers
10.5.4.3 Travelling VSRs are as follows:
·
T1 Travellers on Tung Lung Chau Ferry
·
T2 Motorists on
·
T3 Motorists on
· T4 Users of Kaidos in Port Shelter
· T5 Users of Kaidos in Rocky Harbour
·
T6 Users of Kaidos north of Project
Residential Visually Sensitive Receivers
10.5.4.4 Residential VSRs are as follows:
· D1 Residents in Sheung Yeung, Pan Long Wan, Ng Fai Tin
· D2 Residents in Silverstrand and Bella Vista
· D3 Residents in Long Ke Wan Training Centre
· D4 Residents in Pak Lap
·
D5 Residents in Tai Wan
Occupational Visually Sensitive Receivers
10.5.4.5 Occupational VSRs are as follows:
· O1 Workers on Vessels in Tathong Channel
·
O2 Workers in
· O3 Students at HKU of Science & Technology
· O4 Workers on Vessels <5km and >10km of Project
· O5 Workers on Vessels >10km of Project
·
O6 Workers on Vessels <5km of Project
10.5.4.6 It has been identified by AFCD that an estimated 110,000 people visited the Tung Ping Chau and Yan Chau Tong marine parks in 2008 and that a similar base traffic may be conservatively adopted for the Port Shelter geosites. Assuming a reduction due to adverse weather condition preventing sailing in winter months annual visitors to the Ninepins geosite may be conservatively estimated as 55,000, however, this level that would not be expected to be reached in the short term.
10.5.5
Potential Sources of Landscape and Visual Impacts
10.5.5.1 Two possible layout options are considered in section 2. The option considered in this assessment features a total of 67 3MW turbines, while the alternative option would consist of 40 5MW turbines. Any difference in impacts between the two options is noted below, although these differences are not significant in terms of this landscape and visual impact assessment, and would not result in the residual impacts falling within a different significance threshold.
10.5.5.2 The proposed project will involve the following sources of (Pre) Construction impact:
Pre-Construction Impacts
· Presence of a Jack up Vessel, tugs and barges to construct an 80m high Research Mast (for a period of 1 - 2 months);
· Presence of the Research Mast prior to Construction (period of 1 year)
Construction Impacts
10.5.5.3 Turbines/ Foundations:
· Presence of a Jack up Vessel, tugs and barges to construct foundations (period of a few months over 1 year);
· Construction works on foundations on sea bed (period of a few months over 1 year);
· Presence of Jack-up Vessel, tugs and barges to construct turbine superstructures (period of a few months over 1 year);
· Presence of partially completed structures prior to commissioning (up to a year) and
· Short range night lighting.
10.5.5.4 Other Features:
· Presence of cable laying vessels (up to 4) between wind farm and coast (period of a few months over 1 or 2 years);
· Construction work on Offshore Transformer Station (to a maximum height of approx. 27m above sea level) including construction of foundations on sea bed;
· Short range night lighting and
· Vessel movements (approximately 3,400 over a two year period).
10.5.5.5 Construction impacts associated with the alternative 5MW layout would be slightly smaller in magnitude due to the reduced construction period and a lower number of vehicle movements required (approx. 40% fewer). However, the magnitude of impacts would fall within the same magnitude thresholds as for the 3MW layout.
Operational Impacts
10.5.5.6 Sources of operational phase landscape impact will be:
·
Presence of 67 new turbines
(each having an overall height above sea level of up to 125m). The turbines are composed of a platform (up
to 15m above sea level)
·
Safety features associated with
all turbines shall be orange blade tips and a yellow paint finish at the tower
base above water level, and a low intensity red navigation light pointing
directly upwards in the top of the turbine (not visible at distances greater
than 4km). The top of all turbine nacelles will be orange. In addition, those
turbines at the edge of the array will have an orange stripe half way up the
tower with a low-intensity red navigation light mounted on the tower (not
visible at distances greater than 4km).
Finally, turbines at the corners of the array will be fitted with an
additional navigation light consisting of a flashing yellow light (not visible
at distances greater than 10km) – see Figures
10.21 and 10.22
·
Presence of Offshore
Transformer Station (approx. 27m above sea level) – see Figure 10.22
·
Presence of Research Mast
(approx. 80m high). This will be a lattice tower structure with orange and
white bands and low intensity steady red lighting at top and mid point (visible
at no more than 4km) – see Figure
10.22
· Movement Resulting from the Operation of Turbines – movement of rotors is a potential source of visual impact;
· Shadow Flicker Resulting from the Operation of Turbines - wind turbines are tall structures and can therefore cast shadows when the sun is low in the sky. In certain meteorological conditions and in certain positions (clear skies with the sun in a certain part of the sky behind the wind turbine) observers near a wind turbine could experience "shadow flicker". Shadow flicker is the result of sunlight passing through a turbine blade as it rotates, causing an intermittent shadow. By the nature of the sun, the effect can only occur for limited periods in a day and on limited days in a year. Clarke (N/K) indicates that VSRs situated within 10 rotor diameters (in the case of this Project, 900-1200m) of a wind turbine are most likely to be affected by shadow flicker.
10.5.5.7 Operational impacts associated with the alternative 5MW layout would be very slightly lower due to the visually less dense arrangement of turbines. However, the magnitude of impacts would fall within the same magnitude thresholds as for the 3MW layout.
10.6
Landscape Impact
Assessment
10.6.1
Nature and Magnitude of Landscape Impacts Before Mitigation in Pre-
Construction / Construction Phase
10.6.1.1 The magnitude of the impacts, before implementation of mitigation measures, on landscape resources and landscape character areas that will occur in the (Pre) Construction Phase for the 3MW layout option are described below and tabulated in Table 10.4.
Landscape Resources
10.6.1.2
Offshore Waters (LR1) – During the (Pre)
Construction Phase, the construction and operation of the Research Mast will
result in the loss of around 20 square metres of coastal water. In addition to this, construction of the
turbines of the project will result in the ‘loss’ of around 2240 square metres
of offshore water at both construction stage (approximately 20 square metres
per turbine plus approximately 900 square metres for the transformer
platform). Given the extent of offshore
water in
Landscape Character
10.6.1.3
10.6.2
Nature and Magnitude of Landscape Impacts Before Mitigation in
Operational Phase
10.6.2.1 The magnitude of impacts related to the 3MW layout, before implementation of mitigation measures, on landscape resources and landscape character areas that will occur in the Operational Phase are tabulated in Table 10.4 and described below:
Landscape Resources
10.6.2.2
Offshore Waters (LR1) – During the
Operational Phase, the operation of the Research Mast, turbines and Offshore
Transformer Station will result in the loss of around 2240 square metres of
coastal water (same calculation as described for the (Pre) Construction
Phase). Given the extent of offshore
water in
Landscape Character
10.6.2.3
10.6.2.4 Set against this is the fact that on their completion, the turbines will be of a consistent height, in a regular array. The simplicity of the forms of the turbines; the fact that they are all of a consistent size and their distribution in a regular and clear array, will respond to the simplicity and clarity of the marine landscape. Furthermore, most lights will not be visible at a distance of over 4km nor for more than 12 hours each day, and therefore will be visible over only a small portion of the LCA. However, given that the turbines are relatively large structures and that 6 night lights will be visible over an area within radius of 10km, which constitutes a relatively large part of the LCA, the operation of the wind farm over a 24 hour period would represent an Intermediate magnitude of change to the character of this very extensive landscape. However, the change is wholly reversible upon the decommissioning and dismantling of the project at the end of its life (predicted 20 - 25 years).
10.6.3
Landscape and Visual Mitigation Measures in (Pre) Construction and
Operational Phases
Alternative Sites
10.6.3.1
The site selection process
outlined in section
2, determined that on the basis of other operational considerations
and planning and design constraints, the selected site is the most viable
location for a commercial offshore wind farm in
Alternative Layouts
10.6.3.2 Two different options for the size and layout of the wind turbines are considered in section 2:
· The 3MW layout features a total of 67 turbines of approximately 125m maximum height (80m mast and 45m blades) as shown in Figures 10.21. The 3MW layout forms the basis of this assessment because it is considered to produce slightly greater impacts than the alternative 5MW layout.
· The alternative 5MW layout proposes a total of 40 turbines with a maximum height of 150m each (90m mast and 60m blades), as shown in Figure 10.21. It is predicted that this option will represent a very slightly reduced magnitude of impact overall when compared with the 3MW layout. This is because, as noted in the conclusions to section 10.4, above, a smaller number of individually larger wind turbines is generally considered preferable to a larger number of smaller turbines from a landscape and visual impact perspective. Furthermore, the construction period will be slightly reduced and vehicle movements will be 40% less due to the smaller number of turbines to be erected.
10.6.3.3 For these reasons, it is considered that the potential landscape and visual impacts associated with the 3MW layout will be the greater of the two options, although the difference in the residual impacts experienced by the affected receivers would be too small to differentiate in this assessment and would fall into the same significance threshold for both options. The landscape and visual impact for the 5MW layout has therefore not been assessed in this report.
Mitigation Measures
10.6.3.4
The proposed landscape and
visual mitigation measures for potential impacts generated during the (Pre)
Construction and Operational Phases are described below in Tables 10.2 and 10.3,
together with the associated funding, implementation, management and
maintenance agencies. The mitigation
measures are illustrated in Figure 10.22.
Table 10.2 Proposed (Pre) Construction Phase Landscape and Visual Mitigation Measures
ID
No. |
Landscape
and Visual Mitigation Measure |
Funding
Agency |
Implementation
Agency |
CM1 |
Reduction of Pre-Construction and Construction period to practical minimum. |
HKOWL |
HKOWL |
CM2 |
Control night-time lighting and glare by hooding all lights. |
HKOWL |
HKOWL |
CM3 |
Reduction of number of construction vessels and vessel movements to practical minimum |
HKOWL |
HKOWL |
CM4 |
Painting Research Mast in visually neutral / recessive colours. Consistent with safety requirements, minimise area of each turbine treated with bright colours. |
HKOWL |
HKOWL |
CM5 |
Consistent with meeting safety requirements, minimise numbers of safety lights and their intensity on Research Mast. |
HKOWL |
HKOWL |
Table 10.3 Proposed Operational Phase Landscape and Visual Mitigation Measures
ID No. |
Landscape Mitigation Measure |
Funding Agency |
Implementation Agency |
Management Agency |
Maintenance Agency |
OM1 |
Use a matt or semi-matt off-white finish to turbines to reduce albedo (reflectivity). Consistent with safety requirements, minimise area of each turbine treated with bright colours. |
HKOWL |
HKOWL |
HKOWL |
HKOWL |
OM2 |
Consistent with meeting safety requirements, minimise numbers of safety lights and their intensity. |
HKOWL |
HKOWL |
HKOWL |
HKOWL |
OM3 |
Ensure non-reflective materials used in construction of Offshore Transformer Station and Research Mast. Finishes should be neutral and visually recessive (pale grey / blue or off-white). |
HKOWL |
HKOWL |
HKOWL |
HKOWL |
OM4 |
Employ regular patterns of turbines, to create a balanced, controlled appearance, as opposed to random or clustered groups. |
HKOWL |
HKOWL |
HKOWL |
HKOWL |
OM5 |
The design of turbine towers, above the platform, should be slender and elegant. |
HKOWL |
HKOWL |
HKOWL |
HKOWL |
10.6.4
Programme of Implementation of Landscape and Visual Mitigation
Measures
10.6.4.1 The (Pre) Construction Phase measures listed above will be adopted from the commencement of construction and will be in place throughout the entire construction period. The Operational Phase measures listed above will be adopted during detailed design, and be built as part of the construction works so that they are in place at the date of commissioning of the project.
10.6.5
Prediction of Significance of Landscape Impacts
10.6.5.1 The potential significance of the landscape impacts for the 3MW layout during the (Pre) Construction and Operational Phases, before and after mitigation, are provided below in Table 10.4 and mapped in Figures 10.23, 10.24, 10.25, 10.26. There is no significant difference in the level of landscape impacts between the 3MW and 5MW layouts. This assessment follows the methodology outlined above and assumes that the appropriate mitigation measures identified in Tables 10.2 and 10.3 above will be implemented. Since there are no soft landscape mitigation measures in this project, the assessed impacts at Day 1 and Year 10 are the same. Photomontages of the proposed development before and after mitigation are illustrated in Figures 10.9a, 10.9b, 10.10a, 10.10b, 10,11a, 10.11b, 10.12a, 10.12b, 10.13a, 10.13b, 10.14a, 10.14b, 10.15a, 10.15b, 10.16a, 10.16b, 10.17a, 10.17b, 10.18a, 10.18b, 10.19a, 10.19b, 10.20a, 10.20b.
(Pre) Construction Phase
10.6.5.2 In the (Pre) Construction Phase, after the implementation of the proposed mitigation measures, there will still be some negative residual landscape impacts as described below. The assessment assumes that pre-construction and construction works will last for about two years.
10.6.5.3 No residual negative landscape impacts of Substantial significance will be experienced by landscape resources or LCAs.
10.6.5.4 Negative residual landscape impacts of Moderate significance will be experienced by the following landscape character area:
10.6.5.5
10.6.5.6 Residual landscape impacts of Insubstantial significance will be experienced by the following landscape resources:
10.6.5.7
Offshore Waters (LR1) – During the
Pre-construction Phase, the construction and operation of the Research Mast
will result in the loss of around 20 square metres of coastal water. In addition to this, construction of the
turbines and transformer platform of the project will result in the ‘loss’ of around
2240 square metres of offshore water at both construction stage (approximately
20 square metres per turbine (67 nos.) plus 900 square metres for the
transformer platform). Whilst inshore
water close to the coasts is perceived as being an increasingly scarce
resource,
Operational Phase
10.6.5.8
In the Operational Phase, after
the implementation of the proposed mitigation measures, there will be some
negative residual landscape impacts as described below. In assessing Operational Phase impacts,
consideration was made of the fact that the operational life of the wind farm
will be only 20-25 years, and all impacts are wholly reversible upon the
eventual decommissioning and dismantling of the project. The site selection
process for the wind farm, presented in Sections 2.3 and 2.4, shows that the
wind farm has been sited as far away from coastlines as possible given the site
selection criteria and constraints. This minimizes potential visual impacts.
10.6.5.9 No residual negative landscape impacts of Substantial significance will be experienced by landscape resources or LCAs.
10.6.5.10
Negative residual landscape
impacts of Moderate significance will be experienced by the
10.6.5.11 However, the effects above will be to a certain extent offset by the simplicity of the forms of the turbines; the fact that they are all of a consistent size and they are distributed in a regular and clear array. In these regards, the wind farm will respond to the simplicity and clarity of the marine landscape. The fact that there are no other human features around the Project means that the scale of the turbines will not be very apparent. Also, most night lights will not be visible at a distance of over 4km, which constitutes only a small portion of the LCA
10.6.5.12
The slender etiolated forms of
the turbines will also correspond to the ‘airy’ qualities of this marine
landscape, one of its key characteristics.
In addition, the wide spacing of the turbines (
10.6.5.13 The result of these different factors will mean that the new features will represent an Intermediate magnitude of change to a very extensive landscape, which has a high sensitivity to change. Following the implementation of the mitigation measures listed in Table 10.3, and taking account of the considerations described in section 10.4, it is considered that the resulting significance of impacts on the landscape character of the East Hong Kong Offshore Waters (LCA1) will be Moderate during the Operational Phase. However, the change is wholly reversible upon the decommissioning and dismantling of the project at the end of its life (predicted 20 - 25 years).
10.6.5.14 Residual landscape impacts of Insubstantial significance will be experienced by the following landscape resources:
10.6.5.15
Offshore Waters (LR1) – During the
Operational Phase, the operation of the Research Mast, turbines and transformer
platform will result in the ‘loss’ of around 2240 square metres of offshore
water. Whilst inshore water close to the
coasts is perceived as being an increasingly scarce resource,
Table 10.4 Significance of Landscape Impacts in (Pre) Construction and Operational Phases (Negative Impacts unless otherwise stated)
|
Landscape Resource / |
Sensitivity to Change |
Magnitude of Impact (Change) |
Impact Significance BEFORE Mitigation |
Recommended Mitigation Measures |
Residual Impact
Significance AFTER Mitigation |
||||||||
|
|
(Pre) Construction |
Operation |
(Pre) |
Operation |
(Pre) |
Operation |
|
(Pre) |
Operation |
||||
|
|
|
|
|
|
|
|
|
|
DAY 1 |
YEAR 10 |
|||
Part 1 – Physical Landscape Resources (Topography, Vegetation, Soil,
Open Space, Special Features, etc) |
||||||||||||||
LR1 |
Offshore Waters |
Low |
Low |
Small |
Small |
Insubstantial |
Insubstantial |
None |
Insubstantial |
Insubstantial |
Insubstantial |
|||
Part 2 – Landscape Character Areas |
||||||||||||||
LCA1 |
|
High |
High |
Intermediate |
Intermediate |
Moderate |
Moderate |
CM1-5 OM1-5 |
Moderate |
Moderate |
Moderate |
|||
10.7.1
Visual Mitigation Measures
10.7.1.1 The proposed visual mitigation measures for impacts caused during the (Pre-) Construction and Operational Phases are described previously in Tables 10.2 and 10.3, together with the associated funding, implementation, management and maintenance agencies, and the proposed implementation programme. The mitigation measures are illustrated in Figure 10.21 and 10.22.
10.7.2
Prediction of Significance of Visual Impacts
10.7.2.1 An assessment of the potential significance of the visual impacts for the 3MW layout during the (Pre) Construction and Operational Phases, is briefly described below, and listed in detail in Table 10.5. This follows the methodology outlined above and assumes that the appropriate mitigation measures identified in Tables 10.2 and 10.3 will be implemented. Since there are no soft landscape mitigation measures in this project, the assessed impacts at Day 1 and Year 10 are the same. Photomontages of the proposed development before and after mitigation are illustrated in Figures 10.9a, 10.9b, 10.10a, 10.10b, 10,11a, 10.11b, 10.12a, 10.12b, 10.13a, 10.13b, 10.14a, 10.14b, 10.15a, 10.15b, 10.16a, 10.16b, 10.17a, 10.17b, 10.18a, 10.18b, 10.19a, 10.19b, 10.20a, 10.20b.
(Pre) Construction Phase
10.7.2.2 Residual visual impacts in the (Pre) Construction Phase are tabulated in Table 10.5 and mapped in Figure 10.27. The assessment assumes that pre-construction and construction works will last for about 1 - 3 years. Visual impacts during this stage will be slightly lower for the 5MW layout, due to 40% less vessel movements and a reduced construction period. However, this small difference does not affect the level of significance of the residual impacts.
VSRs within 5km of Wind Farm
10.7.2.3 There are only three VSRs (R21, R23 and O6) within 5km of the wind farm. They will experience Pre-construction Phase works (i.e. the construction and operation of the Research Mast) as a new vertical man-made feature in an otherwise horizontal and natural marine landscape. Although of limited scale, the fairly functional design of the Research Mast is likely to contrast with the clear horizontal qualities of the landscape to the VSRs who see it. However, the structure will not be a wholly exceptional or unusual feature given the presence of buoys, lighthouses, etc in the waters around the HKSAR.
10.7.2.4 VSRs R21, R23 and O6 will see Construction Phase works on the turbines themselves at relatively close distances, as a series of incomplete man-made features jutting out of the sea. These may include the lower parts of turbine masts, partly complete masts as well as the presence of groups of construction vessels, cranes and barges. Whilst single transitory vessels are found in these waters, groupings of static vessels are not common and they may appear somewhat incongruous (particularly at night when vessels and structures are lit by navigation lights, which are uncommon in large numbers in this area). In particular, at close distances, the incomplete and unresolved visual character of the partly complete structures will be very evident, contrasting with the simple, natural, visual uniformity of the marine landscape.
10.7.2.5 The magnitude of change in views of VSR group R23 is considered large, and their sensitivity is high. However, the number of these VSRs is relatively few and they will only be present within close proximity to the Wind Farm for relatively short periods. After the implementation of the (Pre) Construction Phase mitigation measures described in section 10.6.3, the overall significance of the residual impacts upon VSR R23 during the (Pre) Construction Phase is Substantial (see Figure 10.27).
10.7.2.6 The magnitude of change in views of VSR R21 is considered large, and their sensitivity is high. However, because the number of these VSRs is very few, because their presence within close proximity to the Wind Farm will be for very short periods only and because the Construction Phase will is approximately only two years, it is considered that after the implementation of the (Pre) Construction Phase mitigation measures described in section 10.6.3, the overall significance of the residual impacts upon VSR R21 during the (Pre) Construction Phase is Moderate (see Figure 10.27).
10.7.2.7 For similar reasons, and due to the low sensitivity of VSR O6, the overall significance of residual impacts upon VSR 06 will be Insubstantial.
VSRs between 5km and 10km from Wind Farm
10.7.2.8 There are a large number of VSRs located between 5km and 10km from the Wind Farm (R2; R3; R5; R9; R13; R14; R15; R16; R19; R24; T5; T6; O4; D3; D4). However, the magnitude of change in view (before mitigation) experienced by these VSRs in the (Pre) Construction Phase will vary from Large to Intermediate, based on their varying distance from the Wind Farm and the varying number of turbines they can see due to the extent to which their view is blocked by intervening land forms.
10.7.2.9
During the Pre-construction
Phase works they will experience the construction and operation of the Research
Mast as a distant new vertical man-made feature in an otherwise horizontal and
natural marine landscape. At these
distances, the fairly functional design of the mast is unlikely to be very
visible and so there is unlikely to be a large contrast with the clear linear,
horizontal visual qualities that are experienced by closer VSRs. At these distances, the verticality of the
mast against the largely horizontal qualities of the seascape will be less
evident. The structure will not appear
to be a wholly exceptional or unusual visual marine feature, given the presence
of buoys, lighthouses, etc in the waters around
10.7.2.10 The Construction Phase works on the turbines themselves will be seen by of the same VSRs at quite large distances. They will appear as a series of incomplete man-made features jutting out of the sea. These features may include the lower parts of turbine masts, partly complete masts as well as the presence of groups of construction vessels, cranes and barges. Whilst single transitory vessels are found in these waters, groupings of static vessels are not common and they may appear somewhat incongruous (particularly at night when vessels and structures are lit by navigation lights which are uncommon in large numbers in this area). However, at these quite large distances, the incomplete and unresolved visual character of the partly complete structures will be less evident, and therefore will provide less contrast with the simple, natural, visual uniformity of the marine landscape, than for closer VSRs. In particular, the verticality of the structures will be more evident to VSRs at sea level (e.g. R2; R13; R16; R19; R24; T5; T6; O4) than for those on higher areas of land (e.g. R14; R15) but even so, at such quite large distances there is likely to be little visible difference.
10.7.2.11 Allowing for the effects of distance, the partial blocking by intervening landforms, the fact that the works will last for only about 1 - 3 years, and the fact that many of the identified VSRs who are identified as having high sensitivity are actually few or very few in number, and will have only short term views of the Wind Farm, it is assessed that after the implementation of the (Pre) Construction Phase mitigation measures described in section 10.6.3, the adverse residual visual impacts will range from Substantial to Insubstantial significance, as described below (see Figure 10.27).
10.7.2.12
Adverse residual impacts of
Substantial significance will be experienced by VSR R24, visitors to the
proposed
10.7.2.13
Adverse residual impacts of
Moderate significance will be experienced by VSRs R2 and R19. These are the recreational boats users to the
west (R2) and north (R19) of the Wind Farm, and visitors to the proposed Geological
Park (R24). They are of high sensitivity
and if they move to within
10.7.2.14 Adverse residual impacts of Slight significance will be experienced by VSRs D3 (Residents in Long Ke Wan Training Centre) and D4 (Residents in Pak Lap) who, although they are both of High sensitivity, and will be subject to Intermediate magnitudes of change to their view, are nevertheless both very few in number, which reduces the residual impact significance after mitigation to Slight.
Adverse residual impacts of Slight significance will also be
experienced by the following VSRs who have either High or Medium sensitivity,
experience Intermediate or Small magnitude of change and are all few in number:
·
Users of
·
Users of
· Recreational Boat Users in Rocky Harbour (>5km and <10km) (R9);
· Users of Long Ke Wan Bay and Beach (R13);
·
Users of
·
Hikers on Sai Wan
· Users of Pak Lap Wan Bay and Beach (R16);
· Users of Kaidos in Port Shelter (T4);
· Users of Kaidos in Rocky Harbour (T5);
· Users of Kaidos north of Project (T6)
10.7.2.15
The following VSRs, who have low sensitivity, are very few in number,
and will only experience the views for short periods, will experience residual
visual impacts of Insubstantial significance:
·
Workers on Vessels <5km and
>10km of Project (O4)
VSRs Between 10km and 15km from Wind Farm
10.7.2.16 There are a large number of VSRs located between 10km and 15km from the Wind Farm (R1; R4; R6; R7; R8; R10; R11; R12; R17; R18; R20; R22; T1; T2; T3; T4; O1; O2; O3; O5; D1; D2; D5), and the magnitude of change in view (before mitigation) experienced by these VSRs in the (Pre) Construction Phase will vary from Intermediate to Negligible, based on their varying distance from the Wind Farm and the varying number of turbines they can see due to the extent to which their view is blocked by intervening land forms.
10.7.2.17 Given the effects of distance and the panoramic qualities of many views, VSRs between 10km and 15km from the wind farm will scarcely notice (and will find it very difficult to distinguish) Pre-construction works (i.e. the construction and operation of the Research Mast) in their wider views. At these distances, the fairly functional design of the mast is unlikely to be noticeable and there will be no readily evident contrast with the clear linear visual qualities that are experienced by closer VSRs, the mast appearing as an ill-defined maritime feature in the far distance. At these distances, the verticality of the mast against the largely horizontal qualities of the seascape will not be evident.
10.7.2.18 The Construction works on the turbines themselves will be seen by the same VSRs at great distances. The effects of distance and the panoramic nature of the views available will mean that whilst construction works (the lower parts of turbine masts or partly complete masts as well as the presence of groups of construction vessels, cranes and barges) may be visible, they will not be prominent in views. At these great distances, groupings of static vessels (even with night-time navigation lights) will not appear prominent in the marine landscape. Nor will the incomplete and unresolved visual character of the partly complete structures be very evident, and therefore will provide little contrast with the panoramic views which include both coastal and marine landscape. In many cases, turbines will be partially hidden by intervening landmasses or islands. In particular, the verticality of the structures will not be evident, but rather at these distances, it will be the horizontality of the array of features that will be more pronounced (corresponding to the horizontality of the marine landscape).
10.7.2.19 Allowing for the effects of distance, the partial blocking by intervening landforms, the fact that the works will last for only about 1 - 3 years, and the fact that many of the identified VSRs who are identified as having high sensitivity are actually few or very few in number, and will have only short term views of the Wind Farm, it is assessed that after the implementation of the (Pre) Construction Phase mitigation measures described in section 10.6.3, the adverse residual visual impacts will range from Moderate to Insubstantial significance, as described below (see Figure 10.27).
Adverse residual impacts of overall Moderate significance will be experienced by Residents in Silverstrand and Bella Vista (D2). Although they will experience a similar Intermediate magnitude of change in view as other nearby VSRs, they possess High sensitivity to change and are many in number, which raises the significance threshold when compared with other adjacent VSRs who are of few or very few numbers.
Adverse residual impacts of Slight significance will be experienced
by the following VSRs who have High sensitivity, and will experience
Intermediate or Small magnitudes of change, but who are either few or very few
in number, and will mainly experience the views for relatively short transitory
periods:
· Visitors / Hikers on Tung Lung Chau (R1);
· Hikers on High Junk Peak Trail (R4);
·
Users of Little
·
Users of
· Recreational Boat Users in Port Shelter (>10km and <15km) (R8);
· Users of Kau Sai Chau Golf Course (R10);
·
Users of
· Users of Tai Long Wan Bay and Beach (R17);
·
Hikers on
· Recreational Boat Users north of Project (>10km and <15km) (R20);
·
Users of
· Residents in Sheung Yeung, Pan Long Wan, Ng Fai Tin (D1);
10.7.2.20 Adverse residual impacts of Slight significance will also be experienced by the following travelling VSRs who have Medium sensitivity, and of whom there are many (or few on the case of T4) but who will experience small magnitude of change in glimpsed and partial views over short time frames:
·
Motorists on
·
Motorists on
· Users of Kaidos in Port Shelter (T4).
The following VSRs, who have low sensitivity, are very few in number, and will only experience the views for short periods, will experience residual visual impacts of Insubstantial significance:
· Users of HK Sea Cadet Corps Nautical Centre (R11);
· Travellers on Tung Lung Chau Ferry (T1);
· Workers on Vessels in Tathong Channel (O1);
·
Workers in
· Students at HKU of Science & Technology (O3); and
· Workers on Vessels >10km of Project (O5).
Residents in Tai Wan (D5) will
also experience residual visual impacts of
Insubstantial significance because although they have high sensitivity they are
nevertheless very few in number and the magnitude of change in view that they
will experience is (very) small.
Operational Phase
10.7.2.21
Residual visual impacts for the
3MW layout in the Operational Phase are mapped in Figure 10.28. Impacts would be very slightly, but not significantly, reduced due
to the somewhat less dense appearance of the more widely-spaced turbines. The
following should be noted with regard to the assessment of Operational Phase
visual impacts.
· All effective mitigation measures will be in place at Day 1 of Operation, and so visual impacts at Day 1 and Year 10 will be the same.
· In assessing Operational Phase impacts, consideration was made of the fact that the operational life of the wind farm will be only 20-25 years, and all visual impacts are wholly reversible upon the decommissioning and dismantling of the project.
VSRs within 5km of Wind Farm
10.7.2.22 There are only three VSRs (R21, R23 and O6) within 5km of the wind farm. They will be fully able to grasp and appreciate the scale, form, details of the turbines. The verticality of the turbines will be very obvious and will contrast with the overwhelmingly horizontal characteristics of the marine landscape. In particular, the artificial character and colour markings on the mast and blade tips of the turbines will be very evident and will provide a contrast with the natural characteristics of views of the marine landscape.
10.7.2.23 Most navigation lights will generally be visible up to 4km away, with 6 of them visible at up to 10km distance. These features will represent a significant new source of artificial lighting in a marine landscape where night-time lighting is restricted to transitory lights on vessels. Though man-made marine features (including ones with navigation lighting), such as buoys and light houses, are reasonably common throughout Hong Kong’s coastal waters, features of this scale and lights in these numbers are not. Set against this, is the fact that most VSRs, including R21, R23 and O6 are not active at night and so will be unaffected by the effects of lights.
10.7.2.24 According to Clarke (N/K) VSRs within 900m west of the turbines of the turbines in the morning might be subject to ‘shadow flicker’, the effect of turbine rotors passing across the sun. However, the occurrence of this effect relies on a precise combination of factors, including VSR location, wind direction, time of day and year and weather conditions. Given the low chances of these factors all coinciding, as well as the very limited numbers of VSRs who are likely to find themselves within 900m west of the wind farm early in the morning, it is not considered that shadow flicker impacts will be significant.
10.7.2.25 The turbines, spaced in an array 450m or 630m apart will be visually permeable, allowing views through them to open sea (see Figures 10.8a and 10.8b). The simple repetition of the turbines in a clear grid will provide a simple coherence that will respond in a sense to the simplicity and uniformity of the natural marine landscape.
10.7.2.26 The turbines are clean, simple and elegant structures with a form intimately related to their function. To this extent there is a certain aesthetic pleasure that can be derived from the elegant, slender form of a turbine, and in close view they will be a striking, harmonious landscape element maintaining a complementary landscape relationship with the surrounding landscape in terms of their scale and relative simplicity of form (see Figures 10.16a and 10.16b).
10.7.2.27
In close views, the movement of
the turbines will be readily visible in a landscape where movement is at the
moment limited to the movement of ships.
However, the direct functional relationship between turbines and their
location in the marine environment will be implicitly understood by VSRs (i.e.
in an exposed offshore location specifically to utilise the available wind
resource). This is not the case where,
for example, a residential development is proposed to be located in an area of
10.7.2.28 The magnitude of change in views of VSR R23 is considered large, and their sensitivity is high. However because the number of these VSRs is relatively few and their presence within close proximity to the Wind Farm will be for relatively short periods only, and because of the other visual perception factors described above, it is considered that after the implementation of the Operation Phase mitigation measures described in section 10.6.3, the overall significance of the residual impacts upon VSR R23 during the Operation Phase is Moderate (see Figure 10.28).
10.7.2.29 Although the magnitude of change in views of VSR R21 is considered large, and their sensitivity is high, because the number of these VSRs is presently very few, because their presence within close proximity to the Wind Farm will be for very short periods only, and because of the other visual perception factors described above, it is considered that after the implementation of the Operation Phase mitigation measures described in section 10.6.3, the overall significance of the residual impacts upon VSR R21 during the Operation Phase is Slight (see Figure 10.28).
10.7.2.30 For similar reasons, and due to the low sensitivity of VSR O6, the overall significance of residual impacts upon VSR 06 will be Insubstantial.
VSRs Between 5km and 10km from Wind Farm
10.7.2.31 There are a large number of VSRs located between 5km and 10km from the Wind Farm (R2; R3; R5; R9; R13; R14; R15; R16; R19; R24; T5; T6; O4; D3; D4). However, as in the (Pre) Construction Phase, the magnitude of change in view (before mitigation) experienced by these VSRs in the Operation Phase will vary from Large to Intermediate, based on their varying distance from the Wind Farm and the varying number of turbines they can see due to the extent to which their view is blocked by intervening land forms.
10.7.2.32 To VSRs viewing the wind farm at distances between 5km and 10km, the turbines will appear as artificial features, offering a contrast to the largely natural qualities of the coastal and offshore landscapes. At these distances, the turbines will however, tend to appear more like abstract forms than in closer views and therefore this contrast will be less than in those closer views. Colour markings will also be less evident than in closer views.
10.7.2.33 The effects of night lighting on these VSRs will be fairly complex. The designed intensity of navigation lights is such that in almost all cases, they will not be visible at distances of over 4km, and therefore not visible to VSRs over 5km from the Wind Farm. However, 6 of the lights will be visible at distances of up to 10km. These features will represent a new source of artificial lighting in a marine landscape where night-time lighting is restricted to transitory lights on a small number of vessels passing through these waters. Though man-made marine features (including ones with navigation lighting), such as buoys and light houses, are reasonably common throughout Hong Kong’s coastal waters, static lights grouped in this way are not. They will therefore appear somewhat unusual in this landscape. Set against this, is the fact that lights will not be visible for more than 12 hours each day and the fact that most VSRs are not active at night. This will mean that in the VSR groups within 5-10km of the project, the numbers of VSRs affected by night lighting is likely to be very small indeed.
10.7.2.34 The large scale of the turbine structures will tend to be less evident than in closer views and the absence of human scale features close by, means that their precise scale will not be very apparent (Figures 10.9a and 10.9b).
10.7.2.35 In these views, the horizontality of the wind farm layout, as opposed to the verticality of the turbine structures will tend to be appreciated. In this sense, the turbines will tend to correspond to the overwhelmingly horizontal characteristics of the marine landscape. In many views, turbines will be seen along the skyline either behind or next to islands and other land masses, features of a similar scale, which will tend to provide an appropriate scalar setting for them (Figures 10.17a and 10.17b).
10.7.2.36 At greater distances, the array of turbines, though apparently smaller, will also appear somewhat less permeable than in closer views (Figures 10.15a and 10.15b). However, the regularity of the array may be more obvious in some of these views (particularly from elevated locations). As noted above, the simple repetition of a single feature will tend to complement and reinforce the simplicity and uniformity of the marine landscape (Figures 10.18a and 10.18b).
10.7.2.37 In cloudy or hazy conditions, the off-white colour treatment of the turbines will mean that they tend to disappear or fade from view against white or grey skies, whilst in other lighting conditions, their white colour will correspond to natural cloud colours, against which they will frequently be seen.
10.7.2.38 In these more distant views, the simple, elegant, slender geometry of the turbines will be clearly visible and they will tend to create a dramatic and complementary element in views of the natural landscape. The turbines will be perceived to interface in a very subtle way with the landscape, appearing to ‘float’ on the sea, rather than resulting in dramatic changes to the physical texture and structure of the landscape.
10.7.2.39 The effects of motion will be less obvious at these distances (although as noted above, this should not prove to be objectionable given the direct functional relationship of the turbines with their exposed offshore location).
10.7.2.40 Taking into account the range of factors noted above and their effect on the views of VSRs, the following visual impacts will be experienced by VSRs (Figure 10.28):
10.7.2.41
Adverse residual impacts of
Moderate significance will be experienced by VSR R24. These are visitors to the proposed
10.7.2.42 Adverse residual impacts of Slight significance will be experienced by VSRs R2, R19 and R24. These are the recreational boats users to the west (R2) and north (R19) of the Wind Farm. They are of high sensitivity and if they move to within 5km of the Wind farm, will experience a Large magnitude of change in view. However, they are very few in number, their presence within close proximity to the Wind Farm will be for very short periods only, and consequently, after mitigation and taking into account the visual perceptions described above, the overall significance of the residual impacts upon VSRs R2 and R19 during the Operation Phase is Slight (see Figure 10.28).
10.7.2.43 Adverse residual impacts of Slight significance will be experienced by VSRs D3 (Residents in Long Ke Wan Training Centre) and D4 (Residents in Pak Lap) who, although they are both of High sensitivity, and will be subject to Intermediate magnitudes of change to their view, are nevertheless both very few in number, which reduces the residual impact significance after mitigation to Slight.
Adverse residual impacts of Slight significance will also be
experienced by the following VSRs who have either High or Medium sensitivity,
experience Intermediate or Small magnitude of change, but are all few in
number:
·
Users of
·
Users of
· Recreational Boat Users in Rocky Harbour (>5km and <10km) (R9);
· Users of Long Ke Wan Bay and Beach (R13);
·
Users of
·
Hikers on Sai Wan
· Users of Pak Lap Wan Bay and Beach (R16);
· Users of Kaidos in Rocky Harbour (T5);
· Users of Kaidos north of Project (T6)
10.7.2.44 The following VSRs, who have low sensitivity, are very few in number, and will only experience the views for short periods, will experience residual visual impacts of Insubstantial significance:
· Workers on Vessels <5km and >10km of Project (O4)
VSRs Between 10km and 15km from Wind Farm
10.7.2.45 There are a large number of VSRs located between 10km and 15km from the Wind Farm (R1; R4; R6; R7; R8; R10; R11; R12; R17; R18; R20; R22; T1; T2; T3; T4; O1; O2; O3; O5; D1; D2; D5), and the magnitude of change in view (before mitigation) experienced by these VSRs in the Operation Phase will vary from Intermediate to Negligible, based on their varying distance from the Wind Farm and the varying number of turbines they can see due to the extent to which their view is blocked by intervening land forms.
10.7.2.46 To VSRs viewing the wind farm at distances between 10km and 15km, the turbines will appear as small, indistinct, pin-like elements and will be less readily recognisable as human or man-made structures than in closer views (Figures 10.14a and 10.14b). Colour markings and low-intensity navigation lights will not be visible at these distances and so the turbines will tend to appear less like new artificial features in the landscape. For this reason, their contrast with the natural characteristics of the surrounding natural landscape will be less than in closer views.
10.7.2.47 The scale of the turbine structures will not be readily evident due to the absence of human scale features in close proximity to them in these views (Figures 10.13a and 10.13b).
10.7.2.48 In these distant views, VSRs will tend to experience the horizontality of the wind farm array, as opposed to the verticality of the turbine structures (Figures 10.12a and 10.12b). In this sense, the turbines will tend to correspond to the overwhelmingly horizontal characteristics of the marine landscape. In many views, turbines will be seen as part of much wider panoramas of coastal landscape and their significance will therefore diminish in the wider setting. They will typically be seen along the skyline either behind or next to islands and other land masses features which are of a similar scale and will thus tend to provide an appropriate scalar setting for the turbines.
10.7.2.49 At these very great distances, the array of turbines, though apparently smaller, will also appear less permeable than in closer views. However, the regularity of the array may be more obvious in some of these views (particularly from elevated locations, Figure 10.19a and 10.19b) and, as noted above, the simple repetition of a single feature will tend to complement and reinforce the simple uniformity of the marine landscape.
10.7.2.50 At these very great distances, the effects of humidity and haze mean that for many days each year, turbine visibility will be low against white or grey skies, while in clearer air conditions their off-white colour will complement the colours of sea and sky (Figures 10.20a and 10.20b).
10.7.2.51 The effects of motion will not be obvious at these distances, and should offer no significant contrast with the overwhelmingly static qualities of the coastal and offshore landscape.
10.7.2.52 In these more distant views, to the extent that they are visible at all, the turbines will be perceived to subtly interface with the seascape, appearing to ‘float’ on the sea, and will not result in any dramatic change to the physical texture and structure of the landscape.
10.7.2.53 Taking into account the range of factors noted above and their effect on the views of VSRs, the following visual impacts will be experienced by VSRs (Figure 10.28).
Adverse residual impacts of Slight significance will be experienced
by the following VSRs who have High sensitivity, and will experience
Intermediate or Small magnitudes of change, but who are either few or very few
in number (except for D2 of which there are many) and mainly experience the
views for relatively short transitory periods (except D1 and D2):
· Visitors / Hikers on Tung Lung Chau (R1);
· Hikers on High Junk Peak Trail (R4);
·
Users of Little
·
Users of
· Recreational Boat Users in Port Shelter (>10km and <15km) (R8);
· Users of Kau Sai Chau Golf Course (R10);
·
Users of
· Users of Tai Long Wan Bay and Beach (R17);
·
Hikers on
· Recreational Boat Users north of Project (>10km and <15km) (R20);
·
Users of
· Residents in Sheung Yeung, Pan Long Wan, Ng Fai Tin (D1);
·
Residents in Silverstrand and
Bella Vista (D2).
10.7.2.54 Adverse residual impacts of Slight significance will also be experienced by the following travelling VSRs who have Medium sensitivity, and of whom there are many (or few on the case of T4) but who will experience small magnitude of change in glimpsed and partial views over short time frames:
·
Motorists on
·
Motorists on
· Users of Kaidos in Port Shelter (T4).
The following VSRs, who have low sensitivity, are very few in number, and will only experience the views for short periods, will experience residual visual impacts of Insubstantial significance:
· Users of HK Sea Cadet Corps Nautical Centre (R11);
· Travellers on Tung Lung Chau Ferry (T1);
· Workers on Vessels in Tathong Channel (O1);
·
Workers in
· Students at HKU of Science & Technology (O3); and
·
Workers on Vessels >
10.7.2.55 Residents in Tai Wan (D5) will also experience residual visual impacts of Insubstantial significance because although they have high sensitivity they are nevertheless very few in number and the magnitude of change in view that they will experience is (very) small.
Table 10.5 Significance
of Visual Impacts in the (Pre) Construction and Operational Phases (Note: All
impacts negative unless otherwise noted)
VSR Type & ID. |
Key Visually
Sensitive Receiver (VSR) |
Degree of
Visibility of Source(s) of Visual Impact
(Full, Partial,
Glimpse) & |
Magnitude of Impact
(Change) before Mitigation (Negligible, Small, Intermediate, Large) |
Receptor
Sensitivity & Number (Low, Medium, High)
(Very Few, Few, Many, Very Many) |
Impact Significance
BEFORE Mitigation (Insubstantial, Slight, Moderate, Substantial) |
Mitigation Measures |
Residual Impact
Significance AFTER Mitigation (Insubstantial, Slight, Moderate, Substantial) |
|
||||||
|
(Pre) Construction |
Operation |
|
|||||||||||
|
|
(Pre) Construction |
Operation |
(Pre) Construction |
Operation |
(Pre) Construction |
Operation |
(Pre) Construction |
Operation |
|
|
DAY 1 |
YEAR 10 |
|
VSRs located within 5km of Wind Farm |
|
|||||||||||||
R21 |
Recreational Boat Users
<5km from the Project |
Full 0-5km (67) |
Full 0-5km (67) |
Large |
Large |
High (Very Few) |
High (Very Few) |
Moderate |
Slight |
CM1-5 OM1-5 |
Moderate |
Slight |
Slight |
|
R23 |
Visitors to Proposed
Geological Park <5km from the Project |
Full 0-5km (67) |
Full 0-5km (67) |
Large |
Large |
High (Very Few) |
High (Very Few) |
Substantial |
Moderate |
CM1-5 OM1-5 |
Substantial |
Moderate |
Moderate |
|
O6 |
Workers on Vessels <5km of Project |
Full 0-5km (67) |
Full 0-5km (67) |
Large |
Large |
Low (Very Few) |
Low (Very Few) |
Insubstantial |
Insubstantial |
CM1-5 OM1-5 |
Insubstantial |
Insubstantial |
Insubstantial |
|
VSRs located between 5km and 10km from Wind
Farm |
|
|||||||||||||
R2 |
Recreational Boat Users west of
Project (>5km and <10km) |
Full 5-10km (67) |
Full 5-10km (67) |
Large |
Large |
High (Very Few) |
High (Very Few) |
Moderate |
Slight |
CM1-5 OM1-5 |
Moderate |
Slight |
Slight |
|
R3 |
Users of |
Partial-Full 9.5km (17-67) |
Partial-Full 9.5km (17-67) |
Intermediate |
Intermediate |
High (Few) |
High (Few) |
Moderate |
Moderate |
CM1-5 OM1-5 |
Slight |
Slight |
Slight |
|
R5 |
Users of |
Partial-Full 9km (17-67) |
Partial-Full 9km (17-67) |
Intermediate |
Intermediate |
High (Few) |
High (Few) |
Moderate |
Moderate |
CM1-5 OM1-5 |
Slight |
Slight |
Slight |
|
R9 |
Recreational Boat Users in Rocky
Harbour (>5km and <10km) |
Partial 5-10km (1-50) |
Partial 5-10km (1-50) |
Intermediate |
Intermediate |
High (Few) |
High (Few) |
Moderate |
Moderate |
CM1-5 OM1-5 |
Slight |
Slight |
Slight |
|
R13 |
Users of Long Ke Wan Bay
and Beach |
Partial-Full 8-9.5km (1-67) |
Partial-Full 8-9.5km (1-67) |
Intermediate |
Intermediate |
High (Few) |
High (Few) |
Moderate |
Moderate |
CM1-5 OM1-5 |
Slight |
Slight |
Slight |
|
R14 |
Users of |
Partial-Full 8.5-9.5km (17-67) |
Partial-Full 8.5-9.5km (17-67) |
Intermediate |
Intermediate |
High (Few) |
High (Few) |
Moderate |
Moderate |
CM1-5 OM1-5 |
Slight |
Slight |
Slight |
|
R15 |
Hikers on Sai Wan |
Partial-Full 7.7-11km (1-67) |
Partial-Full 7.5-11km (1-67) |
Intermediate |
Intermediate |
High (Few) |
High (Few) |
Moderate |
Moderate |
CM1-5 OM1-5 |
Slight |
Slight |
Slight |
|
R16 |
Users of Pak Lap Wan Bay
and Beach |
Partial 7.5-8km (17-50) |
Partial 7.5-8km (17-50) |
Intermediate |
Intermediate |
High (Few) |
High (Few) |
Moderate |
Moderate |
CM1-5 OM1-5 |
Slight |
Slight |
Slight |
|
R19 |
Recreational Boat Users
north of Project (>5km and <10km) |
Full 5-10km (51-67) |
Full 5-10km (51-67) |
Large |
Large |
High (Very Few) |
High (Very Few) |
Moderate |
Slight |
CM1-5 OM1-5 |
Moderate |
Slight |
Slight |
|
R24 |
Visitors to Proposed
Geological Park >5km and <10km from Project |
Full 5-10km (51-67) |
Full 5-10km (51-67) |
Large |
Large |
High (Very Few) |
High (Very Few) |
Substantial |
Moderate |
CM1-5 OM1-5 |
Substantial |
Moderate |
Moderate |
|
T5 |
Users of Kaidos in Rocky Harbour |
Partial 5-10km (1-50) |
Partial 5-10km (1-50) |
Intermediate |
Intermediate |
Medium (Few) |
Medium (Few) |
Moderate |
Moderate |
CM1-5 OM1-5 |
Slight |
Slight |
Slight |
|
T6 |
Users of Kaidos north of Project |
Full 5-10km (67) |
Full 5-10km (67) |
Large |
Large |
Medium (Few) |
Medium (Few) |
Moderate |
Moderate |
CM1-5 OM1-5 |
Slight |
Slight |
Slight |
|
O4 |
Workers on Vessels <5km and
>10km of Project |
Full 5-10km (67) |
Full 5-10km (67) |
Large |
Large |
Low (Very Few) |
Low (Very Few) |
Insubstantial |
Insubstantial |
CM1-5 OM1-5 |
Insubstantial |
Insubstantial |
Insubstantial |
|
D3 |
Residents in Long Ke Wan Training
Centre |
Partial 9.5-10km (1-50) |
Partial 9.5-10km (1-50) |
Intermediate |
Intermediate |
High (Very Few) |
High (Very Few) |
Slight |
Slight |
CM1-5 OM1-5 |
Slight |
Slight |
Slight |
|
D4 |
Residents in Pak Lap |
Partial 8km (17-50) |
Partial 8km (17-50) |
Intermediate |
Intermediate |
High (Very Few) |
High (Very Few) |
Slight |
Slight |
CM1-5 OM1-5 |
Slight |
Slight |
Slight |
|
VSRs located between 10km and 15km from
Wind Farm |
|
|||||||||||||
R1 |
Visitors / Hikers on Tung Lung Chau |
Partial-Full 10.5-12.5km (17-67) |
Partial-Full 10.5-12.5km (17-67) |
Intermediate |
Intermediate |
High (Very Few) |
High (Very Few) |
Slight |
Slight |
CM1-5 OM1-5 |
Slight |
Slight |
Slight |
|
R4 |
Hikers on High Junk Peak Trail |
Partial-Full 10.5-11km (17-67) |
Partial-Full 10.5-11km (17-67) |
Intermediate |
Intermediate |
High (Few) |
High (Few) |
Moderate |
Moderate |
CM1-5 OM1-5 |
Slight |
Slight |
Slight |
|
R6 |
Users of Little |
Partial-Full 11.5-12km (17-67) |
Partial-Full 11.5-12km (17-67) |
Intermediate |
Intermediate |
High (Very Few) |
High (Very Few) |
Slight |
Slight |
CM1-5 OM1-5 |
Slight |
Slight |
Slight |
|
R7 |
Users of |
Partial 13.5km (1-33) |
Partial 13.5km (1-33) |
Small |
Small |
High (Few) |
High (Few) |
Slight |
Slight |
CM1-5 OM1-5 |
Slight |
Slight |
Slight |
|
R8 |
Recreational Boat Users in Port
Shelter (>10km and <15km) |
Partial-Full 10-15km (1-67) |
Partial-Full 10-15km (1-67) |
Intermediate |
Intermediate |
High (Very Few) |
High (Very Few) |
Slight |
Slight |
CM1-5 OM1-5 |
Slight |
Slight |
Slight |
|
R10 |
Users of Kau Sai Chau Golf
Course |
Partial 11.5-13k (17-50) |
Partial 11.5-13km (17-50) |
Small |
Small |
High (Few) |
High (Few) |
Slight |
Slight |
CM1-5 OM1-5 |
Slight |
Slight |
Slight |
|
R11 |
Users of HK Sea Cadet Corps
Nautical Centre |
Partial 14km (1-16) |
Partial 14km (1-16) |
Small |
Small |
High (Very Few) |
High (Very Few) |
Insubstantial |
Insubstantial |
CM1-5 OM1-5 |
Insubstantial |
Insubstantial |
Insubstantial |
|
R12 |
Users of |
Partial-Full 11.5-14.5km (1-67) |
Partial-Full 11.5-14.5km (1-67) |
Intermediate |
Intermediate |
High (Few) |
High (Few) |
Moderate |
Moderate |
CM1-5 OM1-5 |
Slight |
Slight |
Slight |
|
R17 |
Users of Tai Long Wan Bay and
Beach |
Partial-Full 10-13.5km (1-67) |
Partial-Full 10-13.5km (1-67) |
Intermediate |
Intermediate |
High (Few) |
High (Few) |
Moderate |
Moderate |
CM1-5 OM1-5 |
Slight |
Slight |
Slight |
|
R18 |
Hikers on |
Partial-Full 12.5-15km (1-67) |
Partial-Full 12.5-15km (1-67) |
Intermediate |
Intermediate |
High (Few) |
High (Few) |
Moderate |
Moderate |
CM1-5 OM1-5 |
Slight |
Slight |
Slight |
|
R20 |
Recreational Boat Users
north of Project (>10km and <15km) |
Full 10-15km (67) |
Full 10-15km (67) |
Intermediate |
Intermediate |
High (Very Few) |
High (Very Few) |
Slight |
Slight |
CM1-5 OM1-5 |
Slight |
Slight |
Slight |
|
R22 |
Users of |
Partial-Full 10.5-11km (1-67) |
Partial-Full 10.5-11km (1-67) |
Intermediate |
Intermediate |
High (Few) |
High (Few) |
Moderate |
Moderate |
CM1-5 OM1-5 |
Slight |
Slight |
Slight |
|
T1 |
Travellers on Tung Lung
Chau Ferry |
Partial 11.5-14.5km (1-33) |
Partial 11.5-14.5km (1-33) |
Negligible |
Negligible |
Medium (Very Few) |
Medium (Very Few) |
Insubstantial |
Insubstantial |
CM1-5 OM1-5 |
Insubstantial |
Insubstantial |
Insubstantial |
|
T2 |
Motorists on |
Glimpse 11-15km (1-67) |
Glimpse 11-15km (1-67) |
Small |
Small |
Medium (Many) |
Medium (Many) |
Moderate |
Moderate |
CM1-5 OM1-5 |
Slight |
Slight |
Slight |
|
T3 |
Motorists on |
Glimpse 14.5-15km (1-33) |
Glimpse 14.5-15km (1-33) |
Small |
Small |
Medium (Many) |
Medium (Many) |
Moderate |
Moderate |
CM1-5 OM1-5 |
Slight |
Slight |
Slight |
|
T4 |
Users of Kaidos in Port Shelter |
Partial-Full 10-15km (1-67) |
Partial-Full 10-15km (1-67) |
Intermediate |
Intermediate |
Medium (Few) |
Medium (Few) |
Moderate |
Moderate |
CM1-5 OM1-5 |
Slight |
Slight |
Slight |
|
O1 |
Workers on Vessels in Tathong Channel |
Partial-Full 10-15km (17-67) |
Partial-Full 10-15km (17-67) |
Intermediate |
Intermediate |
Low (Very Few) |
Low (Very Few) |
Insubstantial |
Insubstantial |
CM1-5 OM1-5 |
Insubstantial |
Insubstantial |
Insubstantial |
|
O2 |
Workers in |
Partial-Full 14,175m (51-67) |
Partial -Full14,175m (51-67) |
Small |
Small |
Low (Few) |
Low (Few) |
Insubstantial |
Insubstantial |
CM1-5 OM1-5 |
Insubstantial |
Insubstantial |
Insubstantial |
|
O3 |
Students at HKU of Science &
Technology |
Partial 14.5-15m (1-33) |
Partial 14.5-15m (1-33) |
Small |
Small |
Low (Many) |
Low (Many) |
Insubstantial |
Insubstantial |
CM1-5 OM1-5 |
Insubstantial |
Insubstantial |
Insubstantial |
|
O5 |
Workers on Vessels >10km and
<15km from Project |
Full 10-15km (67) |
Full 10-15km (67) |
Intermediate |
Intermediate |
Low (Very Few) |
Low (Very Few) |
Insubstantial |
Insubstantial |
CM1-5 OM1-5 |
Insubstantial |
Insubstantial |
Insubstantial |
|
D1 |
Residents in Sheung Yeung, Pan Long
Wan, Ng Fai Tin |
Partial-Full 11.5-12.5km (1-67) |
Partial-Full 11.5-12.5km (1-67) |
Intermediate |
Intermediate |
High (Few) |
High (Few) |
Moderate |
Moderate |
CM1-5 OM1-5 |
Slight |
Slight |
Slight |
|
D2 |
Residents in Silverstrand and Bella
Vista |
Partial-Full 13.5-14km (34-67) |
Partial-Full 13.5-14km (34-67) |
Intermediate |
Intermediate |
High (Many) |
High (Many) |
Substantial |
Substantial |
CM1-5 OM1-5 |
Moderate |
Moderate |
Moderate |
|
D5 |
Residents in Tai Wan |
Partial 13.5-14km (1-16) |
Partial 13.5-14m (1-16) |
Small |
Small |
High (Very Few) |
High (Very Few) |
Insubstantial |
Insubstantial |
CM1-5 OM1-5 |
Insubstantial |
Insubstantial |
Insubstantial |
|
* O = Occupational |
10.8.1
Summary of Landscape and Visual Mitigation Measures
10.8.1.1 (Pre) Construction Phase mitigation measures will comprise the following (described in detail in Table 10.2):
· CM1 - Reduction of Pre-Construction and Construction period to practical minimum.
· CM2 - Control night-time lighting and glare by hooding all lights;
· CM3 - Reduction of number of construction vessels and vessel movements to practical minimum;
· CM4 - Painting Research Mast in visually neutral / recessive colours. Consistent with safety requirements, minimise area of each turbine treated with bright colours;
· CM5 - Consistent with meeting safety requirements, minimise numbers of safety lights and their intensity on Research Mast.
10.8.1.2 Operational Phase mitigation measures will comprise the following (described in detail in Table 10.3):
· OM1 - Use a matt or semi-matt off-white finish to turbines and Research Mast to reduce albedo (reflectivity). Consistent with safety requirements, minimise area of each turbine treated with bright colours;
· OM2 - Consistent with meeting safety requirements, minimise numbers of safety lights and their intensity;
· OM3 - Ensure non-reflective materials used in construction of Offshore Transformer Station and Research Mast. Finishes should be neutral and visually recessive (pale grey / blue or off-white);
· OM4 - Employ regular patterns of turbines to create a balanced, controlled appearance, as opposed to random or clustered groups;
· OM5 - The design of turbine tower, above the platform, should be slender and elegant.
10.8.2
Impacts Generally
10.8.2.1 Impacts during the (Pre) Construction Phase and the Operational Phase are likely to be very similar, though this will be for different reasons in each Phase.
10.8.2.2 During the (Pre) Construction Phase, the effect of incomplete structures and shipping will be to introduce incomplete, complex and rather unresolved structures into the natural offshore landscape. These will contrast unfavourably with the uniformity and coherence of the offshore landscape. Impacts will however be only for a relatively short duration (2-3 years).
10.8.2.3 In the Operational Phase however, the effect of completed structures on the character of views will be less significant, due to the fact (explained below) that these structures will in certain ways, complement the landscape. The duration of the impacts is however somewhat greater (20-25 years).
10.8.2.4 The result of the above, are impacts which are very similar for both (Pre) Construction and Operational Phases.
10.8.2.5 It is also important to note that all the landscape and visual impacts described in this assessment are wholly reversible upon the decommissioning and dismantling of the project.
10.8.3
Summary of Predicted Landscape and Visual Impacts in the (Pre)
Construction Phase
10.8.3.1 Residual landscape impacts in the (Pre) Construction Phase are listed in Table 10.4 and mapped in Figures 10.23 and 10.25. Residual visual impacts in the (Pre) Construction Phase are listed in Table 10.5 and mapped in Figure 10.27.
10.8.3.2 The only significant landscape impacts during the (Pre) Construction Phase will be adverse residual impacts of Moderate significance on the landscape character of the Eastern Hong Kong Offshore Waters (LCA1), covering around 15 sq.km.
10.8.3.3
The most significant visual
impacts during the (Pre) Construction Phase will be adverse residual impacts of
Substantial significance on the following VSRs:
·
Visitors to Proposed Geological
Park <5km from Project (R23)
·
Visitors to Proposed Geological
Park >5km and <10km from Project (R24)
10.8.3.4
During the (Pre) Construction
Phase there will also be adverse residual impacts of Moderate significance on
the following VSRs:
·
Recreational Boat Users west of
Project (>5km and <10km) (R2)
· Recreational Boat Users north of Project (>5km and <10km) (R19);
· Recreational Boat Users >5km and <10km of Project (R21); and
·
Residents in Silverstrand and
Bella Vista (D2).
10.8.3.5
There will also be adverse residual visual impacts of Slight
significance during the (Pre) Construction Phase on the following VSRs:
· Visitors / Hikers on Tung Lung Chau (R1);
·
Users of
· Hikers on High Junk Peak Trail (R4);
·
Users of
·
Users of Little
·
Users of
· Recreational Boat Users in Port Shelter (>10km and <15km) (R8);
·
Recreational Boat Users in
Rocky Harbour (>5km and <10km) (R9);
· Users of Kau Sai Chau Golf Course (R10);
·
Users of
· Users of Long Ke Wan Bay and Beach (R13);
·
Users of
·
Hikers on Sai Wan
· Users of Pak Lap Wan Bay and Beach (R16);
· Users of Tai Long Wan Bay and Beach (R17);
·
Hikers on
· Recreational Boat Users north of Project (>10km and <15km) (R20);
·
Users of
·
Motorists on
·
Motorists on
· Users of Kaidos in Port Shelter (T4).
· Users of Kaidos in Rocky Harbour (T5);
· Users of Kaidos north of Project (T6)
· Residents in Sheung Yeung, Pan Long Wan, Ng Fai Tin (D1).
· Residents in Long Ke Wan Training Centre (D3);
·
Residents in Pak Wan (D4).
10.8.4
Summary of Predicted Landscape and Visual Impacts in the Operational
Phase
10.8.4.1 The assessment acknowledges that in certain regards, there will be negative impacts on the landscape and visual amenity of the Project Area and Visual Envelope, resulting from the completed Project.
10.8.4.2 At the same time however, particularly during the Operational Phase, negative effects will be to a certain extent offset by what empirical research and professional opinion (noted above) shows to be certain potential mitigating effects. Therefore the assessment of landscape and visual impact has been informed by a cognisance of this combination of negative and positive effects.
10.8.4.3 Whilst the Project is extensive and its structures tall, it is notable that there are no predicted adverse residual impacts of Substantial significance. This is attributable to a number of factors:
· The marine location of the Project, that means that no significant landscape resources are affected;
· The fact that there are no other human features around the Project, means that the scale of the turbines will not be very apparent;
· The great distance from the Project to most VSRs;
· The small numbers of VSRs who can approach close to the project (all ship-based);
· An emerging acceptance by the public of the appearance of wind farms in the landscape (perhaps in part due to their positive environmental associations with sustainable power). Empirical research shows consistently that a clear majority of people living close to wind farms believe wind turbines have no negative impact on the landscape and that in an offshore context, more people may find them interesting, rather than deterrent features;
· Views from authoritative sources (including in one instance the Secretary of State for the Environment in the UK) that wind farms may in certain circumstances complement existing landscapes and result in an enhancement of sense of place;
· The simple sculptural forms of wind turbines which are seen by some, as being positive landscape features;
· The fact that the Project has a fixed duration (being 20-25 years) and so, though long-term in scope, will be known to be removed in due course. All landscape and visual impacts are therefore wholly reversible when the project is decommissioned and dismantled.
10.8.4.4 Residual landscape impacts in the Operational Phase are listed in Table 9.4 and mapped in Figure 10.24 and Figure 10.26. Residual visual impacts in the Operational Phase are listed in Table 10.5 and mapped in Figure 10.28.
10.8.4.5 The only significant landscape impacts during the Operational Phase will be adverse residual impacts of Moderate significance on the landscape character of the Eastern Hong Kong Offshore Waters (LCA1), covering around 15 sq.km.
10.8.4.6 The most significant visual impacts during the Operational Phase will be adverse residual impacts of Moderate significance on the VSRs Residents in Silverstrand and Bella Vista (D2) and Visitors to Proposed Geological Park <5km (R23) and >5km and <10km from Project (R24).
10.8.4.7
There will also be adverse
residual impacts of Slight significance on the following VSRs during the
Operational Phase:
·
Visitors / Hikers on Tung Lung
Chau (R1)
· Recreational Boat Users west of Project (>5km and <10km) (R2);
·
Users of
· Hikers on High Junk Peak Trail (R4);
·
Users of
·
Users of Little
·
Users of
· Recreational Boat Users in Port Shelter (>10km and <15km) (R8);
· Recreational Boat Users in Rocky Harbour (>5km and <10km) (R9);
· Users of Kau Sai Chau Golf Course (R10);
·
Users of
· Users of Long Ke Wan Bay and Beach (R13);
·
Users of
·
Hikers on Sai Wan
· Users of Pak Lap Wan Bay and Beach (R16);
· Users of Tai Long Wan Bay and Beach (R17);
·
Hikers on
· Recreational Boat Users north of Project (>5km and <10km) (R19);
· Recreational Boat Users north of Project (>10km and <15km) (R20);
· Recreational Boat Users >5km and <10km of Project (R21);
·
Users of
·
Motorists on
·
Motorists on
· Users of Kaidos in Port Shelter (T4).
· Users of Kaidos in Rocky Harbour (T5);
· Users of Kaidos north of Project (T6)
· Residents in Sheung Yeung, Pan Long Wan, Ng Fai Tin (D1).
· Residents in Silverstrand and Bella Vista (D2)
· Residents in Long Ke Wan Training Centre (D3);
· Residents in Pak Wan (D4).
10.8.5.1 Overall, it is considered that, in the terms of Annex 10 of the EIAO TM, the landscape and visual impacts are acceptable with mitigation measures. Whilst the project will give rise to certain significant local effects on the landscape, it is considered that according to Clause 1.1c) “there will be some adverse effects, but these can be eliminated, reduced or offset to a large extent by specific measures”.
10.8.5.2 In reaching this conclusion, it is recognised that a certain percentage of the public will inevitably find the appearance of the Project problematic. Indeed, given the degree to which subjectivity plays a part in forming visual responses, as well as the extent to which the wind farm produces a variety of responses from individuals, it would be unusual to encounter agreement from all parties. However, wind turbines are relatively new features in the landscape worldwide, and research has consistently shown that a clear majority of the public have responses towards their appearance that are more favourable than towards other types of development in similar circumstances. In the particular landscape and visual context of this Project, it can generally be concluded that for the vast majority of VSRs the wind farm will not represent an unacceptable impact.
10.8.5.3 As a footnote to the above, it should be noted that this assessment represents a ‘worst case’ scenario. In particular, the impacts may in fact be eventually reduced from those shown in this assessment by the following factors:
· Constant ongoing advances in the efficiency of turbines mean that when the project undergoes detailed design, it may be possible to use slightly smaller turbines to produce the same output, or the same number of turbines to produce even more output of clean renewable energy.
· As has been noted above, this assessment assumes a 3MW turbine layout, which is considered to be a very slightly worse case than the alternative 5MW layout outlined in section 2. The 5MW layout is predicted to produce a marginally lower magnitude of impacts both during construction, due to approximately 40% fewer vessel movements required to erect the smaller number of turbines, and also during operation due to the slightly less dense visual appearance of the turbine layout. However this difference is not great enough to result in the residual landscape or visual impacts falling within a different significance threshold.
· Research indicates that VSRs undergo an ongoing process of habituation to new forms in the landscape which have a positive environmental connotation and that they regard the appearance of turbines more favourably after completion, than before they are built. It is possible that the general public may continue to see the appearance of structures such as wind turbines as being less and less problematic in the future.
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Maritime Institute for Ireland & Countryside Council for Wales (2001) ‘Guide to Best Practice in Seascape Assessment’, ITERREG Report No.5.
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