•
To construct and
operate a new sewage pumping station with dimension of
Review of Planning and Development Control Framework
Environmental Legislation and Standards
•
Government General
Regulation 740 – restrictions on the preservation and felling of trees in
•
The Forests and
Countryside Ordinance (Cap96) – prohibits felling, cutting, burning or
destroying of trees and growing plants in forests and plantations on government
land. Its subsidiary regulations prohibit the picking, felling or possession of
listed rare and protected plant species
•
The Forestry
Regulations – made under Section 3 of the Forests and Countryside Ordinance
(Cap. 96), defined the list of protected species in
•
ETWBTC No. 2/2004 –
sets out the government departmental responsibilities for maintenance of
vegetation and hard landscape features
•
WBTC No. 3/2006 –
Tree Preservation, which defines and outlines the management and maintenance
responsibilities for natural vegetation and landscape works, and the
authorities for tree preservation and felling
•
WBTC No. 25/93 –
Control of Visual Impact of slopes, outlines the design principles recommended to be used in designing
man-made slopes for Public Works projects in order to reduce their adverse
visual impact
•
WBTC 17/2000 –
Improvement to appearance of slopes, outlines the principles and procedures
recommended for all departments involved in new slope works and maintenance of existing
slopes for improving aesthetic and environmental impact of slope works
•
WBTC No. 7/2002 Tree
planting in Public Works, affirms the advocated policy on tree planting which
adopts a flexible and balanced approach in the planning and design of public
works
•
WBTC No. 29/2004
Registration of Old and Valuable Trees, and Guidelines for their Preservation
•
GEO publication No.
1/2000 ‘Technical Guidelines on landscape treatment and Bio-engineering for
Man-Made Slopes and Retaining Walls’
•
Technical Reports of
Landscape Value Mapping in
•
DSD Publication –
Guidelines on Aesthetic Design of Pumping Station Buildings
•
DSD TC No. 9/2006 –
Vetting Committee on Aesthetic Design of Pumping
•
Baseline study of
landscape and visual resources
•
Landscape impact
assessment
•
Visual impact
assessment
•
Recommendation on
landscape and visual mitigation measures
•
Identification of
residual impacts
Landscape Resources (LRs)
•
Natural and secondary
woodland
•
Amenity planting
•
Scrubland and
grassland
•
Natural topography
•
Significant planning
designation, e.g.
•
Heritage or cultural
features
Landscape Character Area
(LCA)
•
Land use
•
Public use of land
•
Extent of vegetation
•
Age of landscape
•
Cultural, heritage
and religious elements
•
Scale and type of
buildings
•
Pattern of settlement
•
Location and
topography
•
Extent of natural vs
manmade
|
Sensitivity |
Definition |
|
High |
Important components of landscape
of particularly distinctive character susceptible to relatively small changes |
|
Medium |
A landscape of moderately valued
characteristics reasonably tolerant of change |
|
Low |
A relatively unimportant
landscape, the nature of which is largely tolerant to change |
Visual Resources
Zone of Visual Influence/ Visual Envelope (ZVI)
Visually Sensitive
Receivers (VSRs)
•
the type of VSRs,
which is classified according to whether the person is at home, at work, at
school, 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 would have a substantial effect on their perception of
the quality and acceptability of their home environment and their general quality
of life. Those who view the impact from their workplace and at school are
considered to be only moderately sensitive as the attractiveness or otherwise
of the outlook would have a less important, although still material, effect on
their perception of their quality of life. The degree to which this applies
depends on whether the workplace is industrial, retail or commercial. Those who
view the impact whilst taking part in an outdoor leisure activity may display
varying sensitivity depending on the type of leisure activity. Those who view
the impact whilst traveling on a public thoroughfare would also display varying
sensitivity depending on the speed of travel.
•
other factors which
are considered (as required by EIAO GN 8/2002) include the value and quality of
existing views, the availability and amenity of alternative views, the duration
or frequency of view, and the degree of visibility.
|
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. |
·
Identification of relative
numbers of VSRs. This is
expressed in term of whether there are very few, few, medium or many VSRs in
any one category of VSR.
·
Identification of potential
sources of visual impacts. These are the various elements of the construction works and operation
procedures that would generate visual impacts.
·
Assessment of the potential
magnitude of visual impacts. Factors considered include
·
the
compatibility with the surrounding landscape,
·
the
duration of the impact,
·
the
reversibility of the impact,
·
the
scale of the impact and distance of the source of impact from the viewer, and
·
the
degree of visibility of the impact, and the degree of which the impact
dominates the field of vision of the viewer.
•
Identification of the
source of impact, their magnitude, that would be generated during construction
and operation of the project; and
•
Identification of
principal impacts, primarily in consideration of the degree of change to the
baseline conditions.
•
Compatibility of the
project with the surrounding landscape
•
Duration of impacts
under construction and operation phases
•
Scale of the impact
•
Reversibility of
change
|
Magnitude of Change |
Definition |
|
Large |
Notable permanent change in the landscape
characteristics over an extensive area ranging to very intensive changes over
a more limited area |
|
Intermediate |
Moderate changes in a localized
area |
|
Small |
Virtually imperceptible change or
temporary change |
|
Negligible |
Virtually no changes in the area |
•
The landscape
character and its quality
•
The sensitivity of
the landscape in accommodating change
•
Source, nature and
magnitude of potential impacts
•
Construction and
operation phases impacts
•
Degree of change
caused by each of the impacts to the existing LCAs
•
Significance of this
change in the local and regional context and in relation to other developments
•
Cumulative effects on
the landscape of this and neighbouring projects
•
Amenity of
alternative views
|
|
Sensitivity / Quality of the landscape |
|||
|
Low |
Medium |
High |
||
|
Magnitude
of Change |
Large |
moderate |
Moderate / Substantial |
Substantial |
|
Intermediate |
Slight / Moderate |
Moderate |
Moderate / Substantial |
|
|
Small |
Slight |
Slight/ Moderate |
Moderate |
|
|
Negligible |
Insubstantial |
Insubstantial |
Insubstantial |
|
|
Identification
of the Landscape Impact |
Definition |
|
Adverse |
An impact which will be
detrimental to the existing landscape context |
|
Beneficial |
An impact which will
improve the existing landscape context |
|
Neutral |
An impact which will alter the
existing landscape context but not to improve or destroy it |
|
Impacts |
|
|
Substantial |
Adverse/beneficial impact where
the proposal would cause significant deterioration or improvement in existing
landscape quality |
|
Moderate |
Adverse/beneficial impact where
the proposal would cause a noticeable deterioration or improvement in
existing landscape quality |
|
Slight |
Adverse/beneficial impact where
the proposal would cause a barely perceptible deterioration or improvement in
the existing landscape quality |
|
Insubstantial |
No discernible change in the
existing landscape quality |
•
Identification of the
source of visual impacts, their magnitude of change and sensitivity of the
receivers, that would be generated during construction and operation of the
project, and;
•
Identification of
principal visual impacts, primarily in consideration of the degree of change to
the baseline conditions
•
Compatibility of the
proposed project with the surrounding landscape
•
Duration of impacts
during construction and operation stages
•
Scale of impact and
distance of the source of impact from the viewer
•
Reversibility of
impact
•
Potential blockage of
the view
The magnitude of visual impacts is
classified as follows:
|
Large: |
The VSRs would suffer a
major change in their viewing experience. |
|
Intermediate: |
The VSRs would suffer a
moderate in their viewing experience. |
|
Small: |
The VSRs would suffer a
small change in their viewing experience. |
|
Negligible: |
The VSRs would suffer no
discernible change in their viewing experience. |
Relationship between Receptor Sensitivity
and Impact Magnitude in Defining Impact Significance
|
Magnitude
of Impact (Change) |
Large |
Moderate |
Moderate / Substantial |
Substantial |
|
Intermediate |
Slight / Moderate |
Moderate |
Moderate / Substantial |
|
|
Small |
Slight |
Slight / Moderate |
Moderate |
|
|
Negligible |
Insubstantial |
Insubstantial |
Insubstantial |
|
|
|
Low |
Medium |
High |
|
|
Receptor
Sensitivity (of
Landscape Resource, Landscape Character Area or VSRs) |
||||
|
Identification of the Visual Impact |
Definition |
|
Adverse |
An impact which will be
detrimental to the existing views |
|
Beneficial |
An impact which will improve the
existing views |
|
Neutral |
An impact which will alter the
existing views but not to improve or destroy it |
Identification of
Potential Landscape and Visual Impact Mitigation Measures
Identification of
Residual Impacts
Landscape Resources (LR)
The
areas identified as agriculture include orchards and farmland. Orchards are
common around villages and dwellings. This LR is dominated by Dimocarpus longan and Litchi chinensi while other typical
orchard species such as wampi,
breadfruit, mango and citrus trees can also be found. Farmlands include a wide variety of species including cabbages,
coriander, lettuce, etc, which located in the Jockey Club Farm House and Siu
Hang Tsuen. These farmlands and orchards contribute significantly to the agri-rural
visual character within the study area, especially those areas around the Siu
Hang Tsuen and Po Tong Ha. Trees in this LR1 were generally fair in health
condition and possess medium amenity value. The landscape sensitivity to change
of this area is judged to be high.
Several
areas of Woodland/Dense Semi-natural hillside vegetation occur in the study
area. The major areas are 1) an area located to the southwest of Kei Lun Wai;
2) and area located to north of Union Garden; 3) an area located in Tse Tin
Tsuen, Siu Hang Tsuen and Po Tong Ha. Some species in this LR included Acacia confuse, Ficus microcarpa, Sapium
discolour and Mallotus paniculatus etc. These woodlands, together with the
grassland/shrub areas create a green backdrop to the valley and contribute to
the visual quality within the study area. However, much of these woodlands are
interspersed with village houses, and their associated vehicular access road. As
a consequence to this, the woodland here tends to be poor in scale. Trees
in this LR2 were generally fair in health condition and possess medium amenity
value. In additional to this,
haphazard development and open storage yard has encroached on these woodland
area. The
landscape sensitivity to change of this area is judged to be high.
Grassland
and scrubland are located within the study area, which are located adjacent to
the Tsz Tin Tsuen and Po Tong Ha. All are formed by abandoned / vacant land;
therefore, the amenity value and visual character of many of these areas are
low. The landscape sensitivity to change of this area is judged to be low.
Roadside
planting has been included as a landscape resource as it can provide highly
significant contribution to the green corridor and landscape character within
the study area. There are two significant areas of continuous roadside planting
in the study area. These areas are 1) along
Residential
development consists of public open space and sitting areas are located in
There
are several drainage channels within the study area. There are generally in a
natural and rocky state on the hillsides but tend to be channelised and
diverted to box culvert for flooding prevention in the low level valley floor.
Vegetation is limited in the LR area. The landscape quality and amenity value
of these drainage channels is generally low. The landscape sensitivity to
change of this area is judged to be low.
Landscape Character Area
(LCA)
•
LCA 1 – Urban Peripheral Village
Landscape Character Area, which represents the villages such as Tsz Tin Tsuen, Po
Tong Ha, Siu Hang Tsuen and Kei Lun Wai.
They consist typically of grouped village houses, all separated by
narrow footpaths of lanes. At the periphery of the villages may be sitting
areas, car parks and sometimes, scattered fruited fruit trees and agricultural
fields. Vegetation typically consists of scattered mature trees, e.g. Ficus microcarpa, and peripheral
woodland on hillsides, or scrub in abandoned fields. All these result in an
intimate and informal domestic landscape of small scale features, which stands
in stark contrast to the urban development, e.g. Siu Hong Court & West Rail
Siu Hong Station, around them. The landscape sensitivity to change of this area
is judged to be highs. .
•
LCA 2 – Farmland
Landscape Character Area, which represents all area for agricultural usage, including
the new life farm managed by government, Castle Peak Government Farm, Jockey
Club Farm House and farmlands between Siu Hang Tsuen and Tsz Tin Tsuen. Several
of these fields are abandoned. They provide a remanent agrarian character in
the study area. The landscape sensitivity to change of this area is judged to
be medium.
•
LCA 3 – Hillside
Landscape Character Area, which represents all hillside plantation area, which located
to the south of Kei Lun Wai. The upland areas of Kei Lun Wai form the physical
and visual boundary of the study area. They are essentially natural areas
comprising of wooded and grassland slopes. This upland form a scenic backdrop
surrounding the Kei Lun Wai and are an important visual resources. The
landscape sensitivity to change of this area is judged to be high.
•
LCA 4 – Open Storage Landscape
Character Area, which represents all areas used for vehicle parking or storage yards
for large shipping containers in Po Tong Ha, Siu Hang Tsuen, Kei Lun Wai and
Tsz Tin Tsuen. These containers are even sometimes stacked up to seven
containers high and years cover large areas of the landscape creating major
landscape and visual impact within the study area. Many yards have been created
through the filling of ponds and clearing of plantation. The landscape
sensitivity to change of this area is judged to be low.
•
LCA 5 – High-Rise
Residential Urban Landscape Character Area, which represents all mixed use of
high-rise residential zone organized on a orthogonal grid, commercial and
retail uses, and public open space, such as Siu Hong Court. Vegetation includes
amenity planting on podium garden and planting alongside roads and
carriageways. The landscape sensitivity to change of this area is judged to be
medium.
•
LCA 6 –Institutional
Landscape Character Area, which represents all government institutions and public
utilities such as Castle Peak Hospital, Tuen Mun E.A.S.Y. Services centre, The
Jockey Club Perseverance Hall, The Jockey Club Serene House, Tuen Mun Hospital,
Tuen Mun Skills Opportunity School Substation, Castle Peak Hospital Nurses
Quarter, and Jockey Club Tuen Mun Home for the Aged Blind. They generally
comprise extensive medium rise complexes of buildings separated by open spaces
used for parking or circulation, with a high coverage of semi-formal landscape
and vegetation. The landscape sensitivity to change of this area is judged to
be medium.
•
LCA 7 – Transport
Corridor Landscape Character Area, which represents vehicular roads such as Tuen Mun
Road Highway and West Rail Siu Hong Station. They are linear landscapes, whose
major features are the highways and railways that define them. Between the roads and railways are
landscaped embankments and islands, generally with a semi-mature amenity
vegetation of trees and shrubs. The landscape sensitivity to change of this
area is judged to be low.
Table 7.1 List of the Landscape
Resources and Landscape Character Area affected during Construction &
Operational Phase
|
LR |
Landscape Resources |
Dominant Tree Species |
Area(Ha) within Study Area |
Amenity Value |
Sensitivity to Change |
|
LR 1 |
Farmland
/ Orchard |
Dimocarpus longan, Litchi chinensis, etc. |
4.0 |
Medium |
High |
|
LR 2 |
|
Acacia confusa, Ficus microcarpa, Sapium discolor, Sapium sebiferum,
Mallotus paniculatus, Litsea glutinosa, Casuarina equisetifolia, Celtis
sinensis, Sterculia lanceolata, Casuarina equisetifolia, Musa paradisiaca,
Macaranga tanarius, and other native tree species, etc. |
7.4 |
Medium |
High |
|
LR 3 |
Scrubland / Grassland |
N.A. |
1.3 |
Low |
Low |
|
LR 4 |
Roadside
Planting |
Acacia confusa, Bauhinia spp., Ficus microcarpa, Casuarina
equisetifolia, Celtis sinensis, Macaranga tanariu, etc. |
1.1 |
Medium |
Medium |
|
LR 5 |
Urban Residential Open
Space |
Bauhinia spp., Ficus microcarpa, Delonix regia, Cassia
siamea, etc. |
8.0 |
Low |
Low |
|
LR 6 |
Drainage Channel |
N.A. |
0.9 |
Low |
Low |
|
LCA |
Landscape Character Area |
Area(Ha) within Study Area |
Sensitivity |
|
Landscape Resources |
|||
|
LCA1 |
Urban |
37 |
High |
|
LCA2 |
Farmland Landscape
Character Area |
9.8 |
Medium |
|
LCA3 |
|
1.5 |
High |
|
LCA4 |
Open Storage Landscape
Character Area |
17.6 |
Low |
|
LCA5 |
High-Rise Residential
Urban Landscape Character Area |
9.4 |
Medium |
|
LCA6 |
Institutional Landscape
Character Area, |
9.6 |
Medium |
|
LCA7 |
Transport Corridor
Landscape Character Area |
1.6 |
Low |
Visually Sensitive
Receivers (VSRs)
•
High rise residential development of
•
High rise residential development of Po Tin Estate
•
Ridgeline of Yuen Tau Shan and
Table
7.2 Visual Sensitive Receivers
(VSRs) and their
Sensitivity to Change (Note: All impacts adverse unless
otherwise noted.)
|
|
Key
Visual Sensitive Receivers (VSRs) |
Type
of VSRs |
Number of Individuals (Many/ Medium/ Few/ Very Few) |
Quality of Existing View (Good/ |
Availability of Alternative Views (Yes/ No) |
Amenity of Alternative view (Good/ |
Degree of Visibility (Full/ Partial/ Glimpse) |
Frequency and Duration of View (Very Frequent/ Frequent/ Occasional/ Rare) |
Sensitivity to Change (Low,
Medium, High) |
||||
|
Construction |
Operation |
||||||||||||
|
Residential Receivers |
|||||||||||||
|
R1 |
Planned high rise
Public Housing Development at Site 2 |
Residential |
Many |
Good |
Yes |
Good |
Full |
Frequent |
N.A |
High |
|||
|
R2 |
Planned high rise
Public and private housing Residential Site 3 & 4 |
Residential |
Many |
Good |
Yes |
Good |
Full |
Frequent |
N.A |
High |
|||
|
R3 |
Planned high rise
Public Housing Residential Site 1
& 1A |
Residential |
Many |
Fair |
Yes |
Fair |
Partial |
Frequent |
N.A |
Medium |
|||
|
R4 |
High rise residential
development - |
Residential |
Many |
Good |
Yes |
Good |
Partial |
Frequent |
High |
High |
|||
|
V1 |
Village development - |
Residential |
Many |
Fair |
Yes |
Fair |
Glimpse |
Frequent |
High |
High |
|||
|
V2 |
Village development -Po
Tong Ha, Siu Hang Tsuen and Tsz Tin Tsuen |
Residential |
Many |
Fair |
Yes |
Fair |
Glimpse |
Frequent |
High |
Medium |
|||
|
Occupational Receivers |
|||||||||||||
|
GIC1 |
Planned Schools in Site
4A (3 primary and 3
secondary schools) |
Working staff, students |
Many |
Fair |
Yes |
Fair |
Full |
Occasional |
N.A |
medium |
|||
|
GIC2 |
|
Working Staff, patient |
Many |
Good |
Yes |
Good |
Glimpse |
Occasional |
medium |
medium |
|||
|
Recreational Receivers |
|||||||||||||
|
O1 |
Planned District Open Space in Site 4A |
Recreational user |
Many |
Fair |
Yes |
Fair |
Partial |
Occasional |
N.A. |
Large |
|||
|
Travelling Receivers |
|||||||||||||
|
T1 |
Planned Road L54B |
Travelers |
Many |
Fair |
Yes |
Fair |
Partial |
Rare |
N.A. |
Low |
|||
|
Id No. |
Key
Visual Sensitive Receiver (VSR) |
Potential
Blockage of View of the Development from VSR (High l/ Low/ None |
Viewing
Distance (M) |
Scale of
Development (when
viewed from this VSR) (Large/
Medium/ Small) |
Compatibility (Good/
Fair/ Poor) |
Reversibility
of Change (Yes/
No) |
Magnitude
of Impacts (Large/ Intermediate/ Small/
Negligible |
|
|
Construction |
Operation |
|||||||
|
Residential Receivers |
||||||||
|
R1 |
Planned high rise Public Housing Development at Site 2 |
Low |
160 |
Medium |
Fair |
No |
N.A |
Small |
|
R2 |
Planned high rise Public
and private housing Residential Site 3 & 4 |
None |
160 |
Medium |
Fair |
No |
N.A |
Small |
|
R3 |
Planned high rise Public
Housing Residential Site 1 & 1A |
None |
400 |
Small |
Fair |
No |
N.A |
Small |
|
R4 |
High rise residential
development - |
Low |
280 |
Small |
Fair |
No |
Small |
Small |
|
V1 |
Village development - |
Low |
50 |
Large |
Fair |
No |
Intermediate |
Intermediate |
|
V2 |
Village development Po
Tong Ha, Siu Hang Tsuen and Tsz Tin Tsuen |
None |
150 |
Medium |
Fair |
No |
Negligible |
Negligible |
|
Occupational Receivers |
||||||||
|
GIC1 |
Planned Schools in Site
4A (3 primary and 3 secondary schools) |
Low |
0 |
Medium |
Poor |
No |
N.A |
Large |
|
GIC2 |
|
None |
250 |
Medium |
Poor |
No |
Small |
Small |
|
Recreational Receivers |
||||||||
|
O1 |
Planned Schools in Site
4A (3 primary and 3 secondary schools) |
High |
30 |
Large |
Fair |
No |
N.A. |
Intermediate |
|
Travelling Receivers |
||||||||
|
T1 |
Planned Road L54B |
High |
0 |
Large |
Fair |
No |
N.A> |
Small |
Landscape Impact Assessment (LIA)
•
construction works involving the removal of
existing vegetation;
•
construction of site access;
•
excavation works for the inlet chamber and inlet
sewer ;
•
stockpiling of excavated materials;
•
haulage off-site of excavated materials
•
stockpiling of construction materials;
•
importation and storage of construction equipment
and plant;
•
contractor’s temporary works areas, including
site accommodation and parking area;
•
night lighting;
•
New sewage pumping station 43m(L) x 22m (W) x 7m
(H) above ground level)
within Site 4A;
Nature
and Magnitude of Landscape Change Before Mitigation in Construction Phase
Landscape Impacts at Construction
Stage before Mitigation
LR1 -
Farmland / Orchard
LCA2 –
Farmland Landscape Character Area
Residual Landscape Impacts at
Construction Stage after Mitigation
Landscape Impacts at Operation
Stage before Mitigation
Residual Landscape Impacts at
Operation Stage after Mitigation
Table 7.4 Significance of landscape
adverse impacts in the construction and operation phases (Note: All impacts adverse unless otherwise noted. Only
those resources or character areas that are impacted are listed in the table –
resources not impacted are not listed. )
Part
1 – Physical Landscape Resources (Topography, Vegetation, Soil, Open Space,
Special Features, etc)
|
|
Landscape Resources (LR) |
Sensitivity to Change (Low, Medium, High) |
Magnitude of Change before Mitigation (Negligible, Small, Intermediate, Large) |
Impact significance Threshold Before Mitigation (Insubstantial, Slight, Moderate, Substantial) |
Recommended Mitigation Measures |
Residual Impact Significance Threshold After Mitigation (Insubstantial, Slight, Moderate, Substantial) |
||||
|
Construction |
Operation |
Construction |
Operation |
Construction |
Operation |
|||||
|
DAY 1 |
YEAR 10 |
|||||||||
|
LR1 |
Farmland / Orchard |
High |
Intermediate |
Intermediate |
Moderate |
Moderate |
CM1, CM2, CM3, CM4, CM5, CM6, CM7, CM8, OM1 |
Slight |
Insubstantial |
Insubstantial |
|
LR2 |
|
High |
Negligible |
Negligible |
Insubstantial |
Insubstantial |
N/A |
Insubstantial |
Insubstantial |
Insubstantial |
|
LR3 |
Scrubland / Grassland |
Low |
Negligible |
Negligible |
Insubstantial |
Insubstantial |
N/A |
Insubstantial |
Insubstantial |
Insubstantial |
|
LR4 |
Roadside Planting |
Medium |
Negligible |
Negligible |
Insubstantial |
Insubstantial |
N/A |
Insubstantial |
Insubstantial |
Insubstantial |
|
LR5 |
Urban Residential Open Space |
Low |
Negligible |
Negligible |
Insubstantial |
Insubstantial |
N/A |
Insubstantial |
Insubstantial |
Insubstantial |
|
LR6 |
Drainage Channel |
Low |
Negligible |
Negligible |
Insubstantial |
Insubstantial |
N/A |
Insubstantial |
Insubstantial |
Insubstantial |
Part
2 – Landscape Character Areas
|
|
Landscape Character Area (LCA) |
Sensitivity to Change (Low, Medium, High) |
Magnitude of Change before Mitigation (Negligible, Small, Intermediate, Large) |
Impact significance Threshold Before Mitigation (Insubstantial, Slight, Moderate, Substantial) |
Recommended Mitigation Measures |
Residual Impact Significance Threshold After Mitigation (Insubstantial, Slight, Moderate, Substantial) |
||||
|
Construction |
Operation |
Construction |
Operation |
Construction |
Operation |
|||||
|
DAY 1 |
YEAR 10 |
|||||||||
|
LCA1 |
Urban |
High |
Negligible |
Negligible |
Insubstantial |
Insubstantial |
N/A |
Insubstantial |
Insubstantial |
Insubstantial |
|
LCA2 |
Farmland Landscape
Character Area |
Medium |
Intermediate |
Intermediate |
Moderate |
Moderate |
CM1 to CM8, OM1 to OM3 |
Slight |
Insubstantial |
Insubstantial |
|
LCA3 |
|
High |
Negligible |
Negligible |
Insubstantial |
Insubstantial |
N/A |
Insubstantial |
Insubstantial |
Insubstantial |
|
LCA4 |
Open Storage Landscape
Character Area |
Low |
Small |
Small |
Slight |
Slight |
CM2 to CM8, OM1 to OM3 |
Insubstantial |
Insubstantial |
Insubstantial |
|
LCA5 |
High-Rise Residential
Urban Landscape Character Area |
Medium |
Negligible |
Negligible |
Insubstantial |
Insubstantial |
N/A |
Insubstantial |
Insubstantial |
Insubstantial |
|
LCA6 |
Institutional Landscape
Character Area, |
Medium |
Negligible |
Negligible |
Insubstantial |
Insubstantial |
N/A |
Insubstantial |
Insubstantial |
Insubstantial |
|
LCA7 |
Transport Corridor
Landscape Character Area |
Low |
Negligible |
Negligible |
Insubstantial |
Insubstantial |
N/A |
Insubstantial |
Insubstantial |
Insubstantial |
Table 7.5 Significance of visual
adverse impacts in the construction and operational phases
(Note: All impacts adverse unless otherwise
noted.)
|
VSR Type & ID |
Key Visually Sensitive Receiver (VSR) |
Degree of Visibility of Source(s) of Visual Impact (Full,
partial, glimpse) |
Minimum distance between VSR & Source(s) of Impact |
Magnitude of Change in View before Mitigation (negligible,
small, intermediate, large) |
Receptor Sensitivity (Low, medium, High) |
Impact significance threshold before mitigation (insubstantial, slight, moderate, substantial) |
Recommended Mitigation Measures |
Residual Impact Significance Threshold after Mitigation
(insubstantial, slight, moderate, substantial) |
|||||
|
Construction |
Operation |
Construction |
Operation |
Construction |
Operation |
Construction |
Operation |
||||||
|
DAY 1 |
YEAR 10 |
||||||||||||
|
Residential |
|||||||||||||
|
R1 |
Planned high rise Public Housing
Development at Site 2 |
Partial |
160m |
N.A |
Small |
N.A |
High |
N.A |
Slight |
OM1, OM2, OM3 |
N.A |
Insubstantial |
Insubstantial |
|
R2 |
Planned high rise Public and
private housing Residential Site 3 & 4 |
Partial |
160m |
N.A |
Small |
N.A |
High |
N.A |
Slight |
OM1, OM2, OM3 |
N.A |
Insubstantial |
Insubstantial |
|
R3 |
Planned high rise Public
Housing Residential Site 1 & 1A |
Glimpse |
400m |
N.A |
Small |
N.A |
Medium |
N.A |
Slight |
OM1, OM2, OM3 |
N.A |
Insubstantial |
Insubstantial |
|
R4 |
High rise residential
development - |
Partial |
280m |
Small |
Small |
High |
High |
Slight |
Slight |
CM1 to CM6, OM1, OM2, OM3 |
Slight |
Insubstantial |
Insubstantial |
|
V1 |
Village development - |
Partial |
50m |
Intermediate |
Intermediate |
High |
High |
Moderate |
Moderate |
CM1 to CM6, OM1, OM2, OM3 |
Moderate |
Slight |
Insubstantial |
|
V2 |
Village development -Po Tong Ha,
Siu Hang Tsuen and Tsz Tin Tsuen |
Glimpse |
150m |
Negligible |
Negligible |
High |
Medium |
Insubstantial |
Insubstantial |
CM1 to CM6, OM1, OM2, OM3 |
Insubstantial |
Insubstantial |
Insubstantial |
|
Occupational |
|||||||||||||
|
GIC1 |
Planned Schools in Site 4A (3 primary and 3 secondary schools)
|
Full |
0m |
N.A |
Large |
N.A |
Medium |
N.A |
Moderate |
OM1, OM2, OM3 |
N.A |
Slight |
Insubstantial |
|
GIC2 |
|
Partial |
250m |
Small |
Small |
medium |
medium |
Slight |
Slight |
CM1 to CM6, OM1, OM2, OM3 |
Slight |
Slight |
Insubstantial |
|
Recreational |
|||||||||||||
|
O1 |
Planned District Open Space in Site
4A |
Partial |
0m |
N.A |
Intermediate |
N.A |
High |
N.A |
Moderate |
OM1, OM2, OM3 |
N.A |
Slight |
Insubstantial |
|
Traveler |
|||||||||||||
|
T1 |
Planned Road L54B |
Glimpse |
0m |
N.A |
Small |
N.A |
Low |
N.A |
Slight |
OM1, OM2, OM3 |
N.A |
Slight |
Insubstantial |
Recommended
Landscape & Visual Mitigation Measures in Construction and Operational
Phase
Table 7.6 Proposed Landscape and Visual Mitigation Measures in Construction
Phase
|
ID No. |
Nature / Type |
Visual Mitigation Measure |
Funding / Implementation
|
Management/ Maintenance |
|
CM1 |
Design / Construction
Planning |
No-intrusion Zone To maximize protection to
existing trees, woodland, plantation areas and ground vegetation,
construction contracts may designate “No-intrusion Zone” to various areas
within the site boundary with rigid and durable fencing for each individual
no-intrusion zone. The contractor should
closely monitor and restrict the site working staff not to enter the
“no-intrusion zone”, even for non-direct construction activities and storage
of equipment. |
CEDD |
CEDD |
|
CM2 |
Design / Construction
Planning |
Hoarding Hoarding or boundary fencing
for construction shall be considered. It should be sensitively designed,
subtle, camouflaged and more ‘permeable’ so that they fit into the existing
environment when looking from outside. |
CEDD |
CEDD |
|
CM3 |
Site Practice |
Minimize disturbance of
construction workers To ensure minimum
disturbance to existing village, rustic dwellings and workshops users,
construction works may only enter these areas with their helmets and safely
vests properly stored or carried in non-transparent bags. They shall also
properly and cleanly dress. The construction
contract should require the main contractor to issue guideline to the
construction works to minimize disturbance to existing village, rustic
dwellings and workshops. . |
CEDD |
CEDD |
|
CM4 |
Site Practice |
Dust and Erosion Control
for Exposed Soil Excavation works and
demolition of existing squatters / workshops which will be highly visible
form surrounding areas should be well planned and with precautions to
suppress dust. Exposed soil shall be
covered or ‘camouflaged’ and watered often. Areas that are expected to be
left with bare soil for a long period of time after excavation shall be
properly covered with suitable protective fabric. Silt and erosion shall be
controlled by ground barriers around the slope cutting area. |
CEDD |
CEDD |
|
CM6 |
Site Practice |
Construction Light All security floodlights
for construction sites shall be equipped with adjustable shield, frosted diffusers
and reflective covers, and be carefully controlled to minimize light
pollution and night-time glare to nearby village. The Contractor shall
consider other security measures which shall minimize the visual impacts. |
CEDD |
CEDD |
|
CM7 |
Design / Construction |
Re-use of Existing Soil Existing topsoil shall
be re-used where possible for new planting areas within the project. The construction program
shall consider using the soil removed from one phase for backfilling another.
Suitable storage ground, gathering ground and mixing ground may be set up
on-site as necessary. |
CEDD |
CEDD |
|
CM8 |
Site Supervisions/
Establishment Period |
Establishment Period 12 month establishment
period for the soft landscape works will be allowed in the main contract.
Most construction contracts in This period also serves
as a kind of warranty / guarantee on the quality of the plants supplied and
installed by the Contractor. |
CEDD |
CEDD |
Table 7.7 Proposed Landscape and Visual Mitigation Measures in
Operation Phase
|
ID No. |
Nature / Type |
Landscape Mitigation Measure |
Funding / Implementation
|
Management/ Maintenance |
|
OM1 |
Design / Operation |
Re-instatement of
excavated Area All excavated area and
disturbed area for utilities diversion, temporary road diversion, and
pipeline woks will be reinstated to former conditions, subject to applicable
Government Standards. |
DSD |
DSD |
|
OM2 |
Design / Operation |
Architectural Treatment
for the proposed structures Compatible design,
construction materials and surface finishes of the proposed Sewage Pumping
Station should be harmony with proposed GIC development within Site Finishing materials
shall have due consideration to form, basic color, color/tone variation,
micro- and macro-texture, and reflectivity/light absorbance to avoid
glare. |
CEDD (Design) / DSD (Operation) |
DSD |
|
OM3 |
Design / Operation |
Greening for the
proposed Sewage Pumping Station Permeable boundary wall
with tree and shrub planting (with 1.2m topsoil depth planting strip) shall
be used. The tree planting (21 nos. of trees) should be in heavy standard sized
(the stem diameter is exceeding 75mm but not exceeding 150mm measure at a
height of 1m from the root collar) to provide early screening effect. Trees
with normal standard size (the stem diameter is exceeding 45mm but not
exceeding 75mm measure at a height of 1m from the root collar) (14 nos. of
trees) and shrub are proposed for buffer planting. The trees would be one or more of following species: Bauhinia
blakeana, Bischofia trifoliate, Cassia surattensis, Callistemon rigidus and
Magnolia grandiflora. The shrubs
would be one or more of following species: Codiaeum variegatum, Hibiscus
rosa-sinensis, Jasminum sambac, Osmanthus fragrans and Rhododendron
pulchrum. One or more of the
following climbers: Bauhinia glauca, Bougainvillea spectabilis, Lonicera japonica,
Parthenocissus himalayana, Pyrostegia venusta and Wisteria sinensis, flowers
racks or other vertical greening should be installed to soften the monolithic
effects of boundary wall. Green roof with shrub and groundcovers is
proposed. |
CEDD (Design) / DSD (Operation) |
DSD |
Visual Impact Assessment (VIA)
Potential Sources of
Visual Impacts
Visual Mitigation
Measures
Prediction of
Significance of Visual Impacts
Residual Visual
Impacts
Summary of Predicted Residual Landscape Impacts
Summary of Predicted Residual Visual Impacts