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10. LANDSCAPE AND VISUAL IMPACT
Environmental Legislation, Standards and Guidelines
Project Description and Existing Conditions
Review of Planning and Development Control
Landscape and Visual Assessment during Construction Stage
Landscape and Visual Assessment during Operation Stage
Recommended Mitigation Measures
Acceptability of the Proposed Project
Environmental Monitoring and Audit
List of Tables
Table 10.1 Assessment Matrix for Landscape Impact (Positive or Negative)
Table 10.2 Assessment Matrix for Visual Impact (Positive or Negative)
Table 10.3 Landscape Character Units
Table 10.4 Landscape Resources
Table 10.5 Visual Sensitive Receivers
Table 10.6 Summary of Disturbance to Landscape Character Units
Table 10.7 Summary of Disturbance to Landscape Resources
Table 10.8 Summary of Landscape Impacts (without mitigation measures)
Table 10.9 Summary of Visual Impacts (without mitigation measures)
Table 10.11 Summary of Residual Landscape Impact with recommended mitigation measure
Table 10.12 Summary of Residual Visual Impact with recommended mitigation measure
10.1 This section provides an assessment of the landscape and visual impact of the proposed Road P1 Advance Works at Sunny Bay.
10.2 The requirement for and approach to environmental impact assessment is regulated by the Environmental Impact Assessment Ordinance (Cap. 499). The prescribed approach to landscape and visual impact assessment is laid down in Annex 10 and 18 of the Technical Memorandum and Guidance Notes 8/2002 on preparation on landscape and visual impact assessment under EIAO. A number of technical circulars issued by Environmental, Transport and Works Bureau such as circular No. 14/2002 – “Management and Maintenance of natural Vegetation and Landscape Works and Tree Preservation” and No. 2/2004 – “Maintenance of Vegetation and Hard Landscape Features”; No. 19/98 – “The Advisory Committee on the Appearance of Bridges and Associated Structures (ACABAS) and Highways Technical Circular No. 10/2001 – Visibility of Directional Signs are also considered in this assessment.
10.3 The methodology adopted conforms to the requirements of the Environmental Impact Assessment Ordinance and consists of:
· A comprehensive description of existing environment and alternative options
· A definition of the scope and contents of the assessment;
· A comprehensive description of the baseline landscape and visual character;
· Review of the planning and development control framework;
· Impact assessment to identify of the potential landscape and visual impacts and prediction of its magnitude and extent of impact;
· Recommendations on mitigation measures; and
· Assessment of residual impact and conclusion.
10.4 In setting the scope of the landscape and visual impact assessment, the following aspects will be considered:
· Key issues to be addressed;
· Level of details required for baseline studies;
· System to be used for judging significance of impact;
· Impact assessment;
· Recommended mitigation measures;
· Residual impacts;
· Description of existing environment;
· Project description and alternative options;
· Key viewpoints to be covered; and
· Concurrent project and other development if cumulative impacts are to be assessed.
Key Issues to be addressed
10.5 The assessment identifies the impacts of the proposed improvement works upon the resources that make up the landscape, upon the character of that landscape and upon the visual amenity of that area.
10.6 Key issues related to landscape impact of the proposal will include:
· Impacts upon the landscape character and landscape resources within the assessment area; and
· Impact upon the surrounding area within the assessment area.
10.7 Key issues related to visual impact of the proposal will include:
· Impacts upon VSRs due to the proposed improvement works during the construction stage and operation stage; and
· Interference of views due to the proposed project.
10.8 The baseline study will present an appraisal of the landscape and visual resources of the assessment area. It will focus on the sensitivity of the landscape and visual impact on the visual receiver and its ability to accommodate change. Under the Study Brief, the study area defines for the Landscape Impact Assessment is approximately 500 metres from the proposed works site boundary. A visual envelope defines the area for the visual impact assessment. This is generally the view shed formed by natural/manmade feature such as tree lines and building block.
10.9 Landscape resources considered include topography, woodland, and other vegetation, built form, settlement pattern, land use, scenic spots and details of local streetscapes. The baseline study described the landscape resource by identifying broadly homogenous landscape character units (LCU) of a similar character, they are rated on the quality of element, their sensitivity to change and its importance at various geographical level.
10.10 Visual resources considered are typical viewpoints located and direct towards the project. A visual envelope will establish to define the extent of visual influence of the project and the potential visual impacts. Definition of the extent of the view shed will be based on desktop study and site investigation. Visually sensitive receivers (VSRs) identified in this assessment are representative in that individual or groups that have a similar sensitivity to changes in the visual and landscape environment.
10.11 A review of the planning and development control framework has been undertaken to provide an insight to the future outlook of the area affected and the way the improvement work would fit into its wider context. This will also give further insight into possible future sensitive receiver that might be affected by the proposed improvement works.
· Methodology for Landscape Impact Assessment
10.12 Landscape impacts can be positive or negative. They are assessed at two levels:
· Impacts upon individual landscape features and resources; and
· Impacts upon landscape character
10.13 Landscape impacts are assessed as a function of the magnitude of change and the sensitivity of the landscape resource or landscape character. Landscape sensitivity and magnitude of change are assessed as high, medium or low. Landscape impacts are assessed subsequent to the implementation of prescribed mitigation measures at both construction and operational stages and are termed residual impacts.
10.14 Landscape sensitivity is the ability of the landscape character to accommodate change without prejudice to the quality of that resource.
10.15 Magnitude of change is the degree of degradation or intrusion on the landscape element on which it may be possible to affect through landscape or environment enhancement
10.16 Impacts are assessed as very substantial, substantial, moderate, slight or very slight (positive or negative). Insignificant impacts are termed negligible. A matrix is used to assess landscape impacts and is shown in the Table 10.1 below:
Table 10.1 Assessment Matrix for Landscape Impact (Positive or Negative)
Magnitude of Change |
Sensitivity of Landscape Resource/Character |
||
High |
Medium |
Low |
|
High |
very substantial to substantial |
substantial to moderate |
moderate to slight |
Moderate |
moderate to slight |
slight to very slight |
|
Low |
moderate to slight |
slight to very slight |
very slight to negligible |
Negligible |
negligible |
negligible |
negligible |
Note:
Very Substantial - Adverse/ Beneficial impact where the proposed project would cause impairable degradation or improvement in existing landscape baseline conditions.
Substantial - Adverse/ Beneficial impact where the proposed project would cause significant degradation or improvement in existing landscape baseline conditions.
Moderate - Adverse / Beneficial impact where the proposed project would cause noticeable degradation or improvement in existing landscape baseline conditions.
Slight - Adverse / Beneficial impact where the proposed project would cause a barely noticeable degradation or improvement in existing landscape conditions or where the changes brought about by the project would not be apparent in visual terms.
Very Slight - Adverse / Beneficial impact where the proposed project would cause a hardly noticeable degradation or improvement in existing landscape conditions or where the changes brought about by the project would not be apparent in visual terms.
Negligible - The proposed project does not perceptibly affect the existing landscape baseline conditions
10.17 The criteria used to determine the sensitivity of landscape resource are given below:
· The landscape character and resources and their quality;
· The importance of the landscape elements;
· Ability of the landscape to accommodate change; and
· Significance of the change in consideration of the local area and other development.
10.18 The criteria used to determine the magnitude of change are given below:
· Compatibility of the project with the surrounding landscape;
· Duration of impacts; and
· Reversibility of change.
10.19 Visual impacts can be positive or negative and are defined as a function of the sensitivity of a receiver and the magnitude of the change to that receiver’s view.
10.20 The assessment of visual impacts is structured by receiver sensitivity. Visually Sensitive Receivers (VSRs) are identified through the visual envelope. For the purpose of this study, receivers have been grouped into the following categories:
Residential - Those people who would view the proposal from their home
Occupational - Those people who would view the proposal from their workplace
Travellers - Those people who would view the proposal from their vehicles or on foot
Recreational - Those people who would view the proposal whilst engaging in recreational activities
10.21 The sensitivity of receivers to visual impacts is influenced by the immediate context of the viewer, the activity in which they are engaged and the value that they attach to this location in particular. Receivers are categorized as being of high, medium or low sensitivity to visual impacts.
10.22 Those who view the proposal from their homes are considered to be highly sensitive to any visual intrusion. This is because the attractiveness, or otherwise, of the view would have a notable effect on a resident’s general quality of life and acceptability of their home environment.
10.23 Those people who view the scheme from their workplace are considered relatively less sensitive to visual intrusion. This is because they are employed in activities where visual outlook plays a less important role in the perception of the quality of the working environment. They are classified as a low sensitivity group.
10.24 For those who view the scheme whilst engaging in outdoor leisure pursuits, visual sensitivity varies depending on the type of recreational activity. Those taking a stroll in a park, for example, would be classified as a high sensitivity group compared to football players who would have a low sensitivity rating.
10.25 For those people who view the scheme from public thoroughfares, the degree of visual intrusion experienced depends on the speed of travel and whether views are continuous or only occasional. Generally, the slower the speed of travel and the more continuous the viewing experience, then the greater the degree of sensitivity.
10.26 The criteria used to determine the sensitivity of VSRs are given below:
· value of existing views;
· degree of visibility;
· availability and amenity of alternative views;
· the length and duration of time the proposed development is in view
· the number of visual receivers;
· the category or type of visual receivers as discussed above;
· the landscape context of the proposed development; and
· the particular visual backdrop from specific viewpoints.
10.27 The criteria used to determine the magnitude of change to a view are given below:
· proximity of receivers;
· the nature of the proposed development and its compatibility with the surrounding landscape;
· degree of change of views;
· the landscape context of the proposed development;
· the particular visual backdrop to the development from specific important view points;
· scale of development;
· reversibility of change;
· potential blockage of view; and
· duration of impacts under construction and operation phases.
10.28 Impacts are assessed as very substantial, substantial, moderate, slight or very slight. Insubstantial impacts are termed negligible. A matrix is used to assess visual impacts and is shown in Table 10.2 below:
Table 10.2 Assessment Matrix for Visual Impact (Positive or Negative)
Magnitude of Change |
Sensitivity of Receiver Group |
||
High |
Medium |
Low |
|
High |
very substantial to substantial |
substantial to moderate |
moderate to slight |
Moderate |
substantial to moderate |
moderate to slight |
slight to very slight |
Low |
moderate to slight |
slight to very slight |
very slight to negligible |
Negligible |
negligible |
negligible |
negligible |
Note:
Very Substantial - Adverse/ Beneficial impact where the proposed project would cause impairable degradation or improvement in existing landscape baseline conditions.
Substantial - Adverse/ Beneficial impact where the proposed project would cause significant degradation or improvement in existing visual baseline conditions.
Moderate - Adverse / Beneficial impact where the proposed project would cause noticeable degradation or improvement in existing visual baseline conditions.
Slight - Adverse / Beneficial impact where the proposed project would cause a barely noticeable degradation or improvement in existing visual conditions or where the changes brought about by the project would not be apparent in visual terms.
Very Slight - Adverse / Beneficial impact where the proposed project would cause a hardly noticeable degradation or improvement in existing landscape conditions or where the changes brought about by the project would not be apparent in visual terms.
Negligible - The proposed project does not perceptibly affect the existing visual baseline conditions.
10.29 Mitigation will not be limited to damage reduction but the consideration of potential landscape visual enhancement. This study presents the most appropriate mitigation measure proposal for consideration.
10.30 The identification of the landscape and visual impact will highlight those sources of conflict requiring design solutions or modification to reduce impacts and absorb the improvement and associated activities into the surrounding landscape. These mitigation efforts will consider factors as list below and will derive landscape mitigation proposals to alleviate the identified landscape and visual impact.
· Woodland, tree and shrub planting to new or disturbed slopes, amenity strips, highway reservations and adjacent to any proposed structures:
· Contouring of new slopes to blend with existing topography in a natural manner;
· Earth mounding and screening;
· Highlighting unacceptable impacts and considering alternative proposals;
· Hard landscape elements including design and appearance of proposed facility; and
· Significant landscape elements.
10.31 Residual impact is defined as the impact remaining after all practical methods of mitigation have been implemented. At the final stage of the landscape and visual impact assessment study, the residual impacts are assessed. The impacts (with reference to Annexe 10 of EIA TM) will be classified according to their level of significance as summarized below:
- the project will complement the landscape and visual character of its setting, will follow the relevant planning objectives and will improve the landscape and visual quality of the assessment area. |
|
- the assessment indicates that there will be no significant effects on the landscape, no significant visual effects caused by the appearance of the project, or no interference with key views. |
|
- the assessment indicates that there will be some adverse effects but these can be eliminated, reduced or offset to a large extent by specific measures. |
|
- the adverse effects are considered too excessive and are unable to mitigate practically. |
|
- significant adverse effects are likely, but the extent to which they may occur or may be mitigated cannot be determined from the study. Further detailed study will be required for the specific effects in question. |
10.32 The major purpose of the proposed project is to advance part of Road P1 at Sunny Bay to provide a second entrance/exit to and from the proposed theme park and other development in Penny’s Bay in case of emergency. Descriptions regarding the major project components are discussed in Chapter 2 of the EIA Report.
10.33 The assessment area is situated at Sunny Bay at the north shore of Lantau Island. The proposed Slip Road 5 and Slip Road 6 connect the existing North Lantau Highway, an at-grade Road A and at-grade Road P1 roundabout at Sunny Bay reclamation area. The existing site conditions are illustrated in aerial photo Figure 10.1.
10.34 The assessment area is orientated in a east – west direction with the North Lantau Highway (NLH), Airport Express Line (AEL) and Disneyland Resort Line (DRL) running parallel on the south side of the Sunny Bay reclamation area. The greenery of Cheung Sok Island and Luk Keng Headland together with the Yam O Wan at north side forms visually pleasurable scenery. The hill knolls of Tai Shan, Tai Yam Teng and Mong Tung Hang forms a green backdrops from southwest to southeast. To the west are the transport corridor and railway structures. To the east are the Sunny Bay Traction Substation and the reclamation site of the existing temporary Sunny Bay Public Transport Interchange (Sunny Bay PTI) / future Tourism Area Gateway with the open sea and distant hills as backdrop.
10.35 The landscape and visual context in the immediate vicinity has been identified and illustrated in Figure 10.1.
· Yam O Wan –The Yam O Wan is located on the north side of the site. The log pond within the open water has distinctive landscape character of their own in assessment area. It is visually pleasurable and serves as an attractive tourism spot. With the Luk Keng Headland and Cheung Sok Island as green background, the whole setting forms a pleasant view to the visual receptors;
· Hill Knoll – the Hill Knoll on the south side also provide visual relief to the visitors/passengers travelling on the transport corridor and forms a green pleasant backdrop;
· Existing transport corridor – these include mainly the NLH, AEL, DRL and existing link roads 1 to 4. Some temporary site office and works areas are also located along the corridor. Amenities planting along the corridor soften the hard elements. The overall structure (which include edge parapets and columns) of the bridges has similar colour and shapes to reduce visual intrusion;
· Village and other settlement – The only village site identified with habitation is the Luk Keng Tsuen. Luk Keng Tsuen contains approximately population of 13 people as stated in the explanatory statement of North-East Lantau Outline Development Plan No. D/1-NEL/1. The village is sited about 220m from the Project. The pier and house offices for the logging industry are also within the village’s vicinity; and
· Utility facilities and other existing facilities – the existing utility facilities include the Sunny Bay Traction Substation. Other existing facilities includes the temporary Sunny Bay PTI/ future Tourism Area Gateway, the Sunny Bay MTR station, and other utility facilities below and adjacent to the Sunny Bay Interchange;
10.36 Three alternative alignments for the Project were discussed in Chapter 2 and the landscape and visual impact for the three alternatives are described in the following paragraphs.
10.37 For the recommended option, Slip Roads 5 and 6 are divided into permanent and temporary section. The temporary steel deck sections and the at-grade Road A and P1 Roundabout will be located on the Sunny Bay reclamation area adjacent to the Temporary Sunny Bay PTI/ future Tourism Area Gateway. The permanent concrete sections will run south-eastward crossing over the NLH and AEL. The required reclamation is approximately 3 hectare, which is approximately 6 hectare less than the requirement for option 1 as describe below and will reduce the landscape impact upon Sunny Bay. The adoption of the steel decking will allow flexibility in diversions during the implementation of the future Road P1 and Temporary Sunny Bay PTI. Since the temporary section are located on the reclaimed land, the demolition and construction work of this part will not interfere with other development, thus minimize the landscape and visual impacts upon the planned tourism/PTI development and transportation Corridors. The alignment of this option and comparison of impact is illustrated in Figure 10.2.
10.38 Option 1 connects with the NLH via the two existing end of slip roads of Sunny Bay Interchange and run north-eastward over the log ponds in Yam O Wan. Although the structure and alignment is similar to the recommended option, it will require further reclamation of approximate 6 hectare and construction of additional bridge foundations. These will result in a longer construction time. In consequences, this option will generate and prolong the unfavourable impacts upon the landscape and visually resources within the assessment area. Therefore this option is not recommended due to longer construction time and additional area needed for reclamation. The alignment of option 1 and its impact is illustrated in Figure 10.3.
10.39 The alignment of the slip roads as in Option 2 are turning 180 degree around and over the existing NLH and Sunny Bay MTR Station and connect with Sunny Bay Road (Sunny Bay Section). This option will result in the elimination of the need for reclamation at log pond. Although this option will reduce the adverse impact upon Sunny Bay, it will generate direct and adverse visual impact upon the future PTI/tourism area gateway due to the long span of the structure crossing over the top of the future MTR Station and transportation corridor. In addition, it is necessary to demolish the whole structure for the implementation of the future Road P1. In consequences, this will generate both visual and landscape impact upon the PTI and existing transportation corridor during the demolition stage. Therefore, this option is not considered. The alignment of Option 2 and its impact is illustrated in Figure 10.4.
10.40 To conclude, Option 1 and Option 2 will have longer construction time, the need for construction of additional bridge foundation, additional area of reclamation (for option 1) and difficulty to facilitate the implementation for future Road P1. These unfavourable factors will prolong the adverse visual and landscape impacts when compared to the recommended option and therefore not recommended.
10.41 More details regarding construction methods for alternative alignments are discussed in Chapter 2.
10.42 The construction of the project will commence in mid 2006 and complete in end 2008. The life cycle of these works can be divided into the construction stage and operation stage. The impact will be assessed for all sensitive receivers ever on the temporary sections as long as they can see that section at that period of life cycle. The temporary section of the Project will be demolished for the implementation of the Sunny Bay Tourism Area Gateway in about Year 2016.
10.43 Perspective view of the recommended option is illustrated in Figure 10.5.
10.44 Five principal viewpoints have been identified to indicate both the existing and the proposed views before and after implementation of this project. For the purpose of this environmental impact assessment study, the following viewpoints would be appropriate and photomontages are therefore prepared.
· View east from Yam O Wan (Figure 10.6);
· View west from North Lantau Highway (Figure 10.7);
· View north from existing Link Road 1 (Figure 10.8); and
· View south from North Lantau Highway (Figure 10.9 and Figure 10.10).
· View from Sunny Bay MTR Station (Figure 10.23)
10.45 There is no concurrent project in the vicinity of the site area during construction period as discussed in Section 2 of the EIA Report.
10.46 The baseline study will present an appraisal of the landscape and visual resources of the assessment area. It will focus on the sensitivity of the landscape and visual impact on the visual receiver and its ability to accommodate change.
10.47 In accordance with the EIAO Guidance Note No. 8/2002, the landscape impact assessment area is identified within 500m from the work limit of the project and illustrated in Figure 10.11. The defined visual envelope (zone of visual influence) is shown on Figure 10.12.
10.48 North Lantau Highway (NLH) and Airport Express Line (AEL) are located to the immediate south of the steel sections of Slip Roads 5 and 6. Views of Yam O Wan are at present partially obstructed by the railway structures and the Sunny Bay Traction Substation when viewed from the south side. When viewed from the west side of NLH. The distant hills are partially obstructed by the existing elevated roads.
10.49 The temporary Sunny Bay PTI, which will be demolished for the implementation of Sunny Bay Tourism Area Gateway in 2016, with the Sunny Bay MTR Station located at the west, this area can be seen as part of the overall context and blend in with the elevated slip road structures.
10.50 The future land use of Sunny Bay PTI area will be converted to a tourism node, namely Sunny Bay Tourism Area Gateway, based on the latest planning. Works constructed under this Project will be demolished to facilitate implementation of the Sunny Bay Tourism Area Gateway except the concrete bridge sections of Slip Roads 5 and 6. Therefore, landscape and visual impact assessment on the future Sunny Bay Tourism Area Gateway will be assessed for all VSRs except for those who would not see the temporary works.
10.51 In accordance with the North-East Lantau Outline Development Plan (ODP No. D/1-NEL1), it is assumed that the building height restriction in the Tourism Area Gateway (Area 3A) will be at 40mPD maximum and 15m within the G/IC zone. And the airport height restriction is 120 mPD.
10.52 In accordance with the study brief, landscape character units (LCUs) and landscape resources have been identified within 500m from the site boundary and listed in Table 10.3 and 10.4 below respectively. The LCUs have been selected depending on the presence and combination of landscape pattern, topography and existing vegetation. Namely: Yam O Wan , existing transport corridor, green belt of Tai Shan and Tai Yam Teng, conservation area of Luk Keng Headland and Cheung Sok Island, existing utility facility, temporary Sunny Bay PTI/future tourism gateway area. For each LCU assessment has been made of its quality and sensitivity to change. The landscape resources (including trees, sea, coastline, log pond, existing roads etc.) have been quantified. The assessment area is illustrated in Figure 10.11. Landscape character units and landscape resources are illustrated in Figure 10.13 and 10.14 representatively. Photos taken at selected representative landscape character units are prepared and illustrated in Figure 10.15.
10.53 The combination of the LCUs are discussed below and shown in Table 10.3.
· Yam O Wan (LCU1) - – The log pond within the inlet is a distinctive character within the assessment area and recognised as a regionally significant character. The coastline, open water and log pond is disturbed by the on-going reclamation activities currently. The overall landscape quality is high and sensitivity to change of LCU 1 is high. The temporary section of the Project is located within the reclamation area of LCU1;
· Existing Transport Corridor (LCU2) - Existing structures for vehicle, which include the NLH, the AEL, Existing Link Roads 1 to 4 and Cheng Tung Road is the key assess to airport. NLH and AEL are linear structures running mainly east to west. The existing link roads 1 to 4 are bridges and ramp down from the Sunny Bay Interchange towards north and connect to the NLH. The linear engineering structure can always adapt to change and has a low sensitivity. Common species of roadside tree are found within the corridor. This LCU has low landscape quality. The permanent section of the proposed slip roads 5 and 6 will cross over on top of LCU2;
· Green Belt (LCU3A) – The Green Belt includes the major ridgelines of Tai Shan at southeast, Tai Yam Teng and Fa Peng Teng to the southeast. This LCU encompasses north facing wooded slopes that provide a green backdrop to the proposed Project. Parts of the woodland resources on the south side have been disturbed by formation works required for road and /or construction of utility facilities for future tourism area and the theme park at Penny’s Bay. This localised disturbance LCU3A remains as important landscape resource in local context of the future land use (i.e. the theme park and tourism area gateway). Because of this distinct nature, LCU3A has as high landscape quality and a high sensitivity to change;
· Conservation area (LCU3B) – This area includes the existing woodland and coastline of the Luk Keng Headline and Cheung Sok Island at the north side of the site. The wooded areas provide a green backdrop and an attractive coastline to the Project. Therefore LCU3B is considered as an important landscape character in local context of the land use (i.e. for natural vegetation and terrain conservation). LCU3B is considered has a high landscape quality and a high sensitivity to change.
· Utility Facilities (LCU4) - Existing and proposed facilities at Sunny Bay Transport Interchange, which include the Sunny Bay Traction Substation adjacent to the Sunny Bay MTR Station. The existing utility stations include the sewage pumping stations below Sunny Bay Interchange and irrigation booster pumping station next to the Interchange of the Cheung Tung Road for Penny’s Bay development. LCU4 is assessed as having a low landscape quality as utility buildings are not serve as attraction point and that is can accommodate change; and
· Sunny Bay PTI/Future Tourism Gateway Area (LCU 5) - Under the North-East Lantau Outline Development Plan (ODP No. D/1-NEL/1), the sites along the north side of NLH at Sunny Bay Reclamation area are mainly designated as ‘Tourism and Recreations Related Uses 1’ with possible use of hotel, and tourism related facilities. The Sunny Bay PTI, which will be demolished for the implementation of Sunny Bay Tourism Area Gateway in 2016. The proposed facilities will have with major visual nodes towards the seaside. Under the same Outline Development Plan, the area fronting the main transport corridor is zoned at ‘OU’ (other specified use) annotated “Amenity Area’ to provide landscape corridors as well as additional landscape berms are envisaged within the ‘G/IC’ (Government, Institution or community) annotated “Amenity Area” to screen off the car-park and PTI. Therefore, the overall quality of this LCU can be considered to be medium. The sensitivity to change is low because the existing Sunny Bay PTI will be demolished for the construction of the tourism gateway. The proposed Project will have no direct physical impact upon this LCU as the bridge structure will run along the NLH and AEL except the at-grade road A will connect to the roundabout in Sunny Bay PTI in the future.
Table 10.3 Landscape Character Units
LCU |
Name |
Description |
Quality/Sensitivity to Change |
LCU1 |
Yam O Wan |
Existing coastline, log pond and open water beyond the log pond |
High/High |
LCU2 |
Existing Transport Corridor |
Existing structures for vehicle, which include the NLH, the AEL, Existing Link Roads 1 to 4 and Cheung Tung Road. |
Low/Low |
LCU3A |
Green Belt of Tai Shan and Tai Yam Teng |
Existing hill slopes comprises the predominantly wooded backdrops of Tai Shan and Tai Yam Teng |
High/High |
LCU3B |
Conservation area of Luk Keng headland and Cheung Sok Island |
Existing woodland and coastline of Luk Keng Headland and Cheung Sok Island. |
High/High |
LCU4 |
Existing utility Facilities |
Existing facilities include the existing Sunny Bay Traction Substation, sewage pumping stations below Sunny Bay Interchange and irrigation booster pumping station next to the interchange of Cheung Tung Road. |
Low/Low |
LCU5 |
Temporary Sunny Bay PTI/ Future Sunny Bay Tourism Area Gateway |
The site adjacent to the Sunny Bay MTR Station will be considered as a transport node up to year 2013 and become tourism gateway in year 2016. |
Medium/Low |
10.54 Within the 500m assessment area, the temporary section of the Slip Roads 5 and 6 falls within Yam O Wan (LCU1) and the permanent section fall within the existing transport corridor (LCU2). The addition of bridge structure along north of NLH and adjacent to the Sunny Bay PTI/Future Tourism Area Gateway (LCU5) does not present any physical impact upon this LCU. The structures of the slips road do not have any physical impact upon the existing utility facilities (LCU4) as well as, Green Belt area of Tai Shan and Tai Yam Teng (LCU3A) and Conservation Area of Luk Keng Headland and Cheung Sok Island (LCU3B) because no pier foundations are entrusted into these LCUs. The landscape resources (refer to Table 10.4) are changing due to reclamation and other construction activities on current projects. The overall quality of LCU1 will subject to changed for the on-going development for the Tourism Area Gateway. The overall quality of LCU2 will remain as transport corridor in the future. The permanent section of the slip roads is located within the LCU2, a total of 111 nos. of roadside trees are falls within the working area of the project.
Table 10.4 Landscape Resources
LES |
Type |
Total area within project area |
Description |
LE1 |
Existing Road Side Tree |
Approx. 111 nos. within works limit |
Existing planting on amenity planting strip along roads |
LE2 |
Industrial/ utility buildings |
Approx. 2 ha. |
Existing facilities include the existing Sunny Bay Traction Sub-station, Sunny Bay MTR Station, sewage pumping stations and irrigation booster pumping station next to the Interchange of the Cheung Tung Road.
|
LE3 |
Existing Roadway |
Approx. 20 ha. |
Existing structures for vehicles which include the NLH, AEL, existing Link Roads 1 to 4 and Cheng Tung Road.
|
LE4 |
Open Water |
Approx. 67ha. |
Existing open eater beyond the log pond at Yam O Wan
|
LE5 |
Coastline |
Approx. 4000m long |
The existing coastline along Luk Keng Headland, Cheung Sok Island and along NLH. |
LE6 |
Log Pond |
Approx. 22 ha. |
Existing log pond at Yam O Wan |
LE7 |
Woodland |
Approx. 245 ha. |
Existing vegetation on Tai Shan, Tai Yam Teng, Luk Keng Headland and Cheung Sok Island |
10.55 In accordance with the assessment methodology, visually sensitive receivers (VSRs) within the visual envelope were identified and grouped into types as shown in Table 10.5. Locations of the VSRs are indicated on plan in Figure 10.16 and photos taken at selected viewpoints are shown on Figure 10.17. In summary, the VSRs can be classified into 8 representative groupings according to the location of the Project as defined in Table 10.5. The visual resources closely relate to the landscape character units (LCUs) as discussed in paragraphs 10.56 to 10.58.
10.56 To assist in determining Visually Sensitive Receivers (VSRs), a visual envelope has been determined as illustrated in Figure 10.12 and key views from and toward the proposed Project are described as below.
10.57 Key views from the Project are:
· North with open view to the Yam O Wan Inlet and green backdrops of the Luk Keng Headland and Cheung Sok Island;
· South with open view to the existing transport corridor and elevated roads at Sunny Bay Interchange;
· Partially obstructed view to the south towards the green backdrops of Tai Shan and Tai Yam Teng;
· East to the reclamation site for the Sunny Bay PTI/Tourism Area Gateway. The existing Sunny Bay Traction Sub-station partially obstructs the views towards distant hills; and
· Views to the west and southwest are dominated by railway structures (the Airport Express Line) and North Lantau Highway (NLH) with part of Yam O Wan Inlet as backdrop.
10.58 Key views toward the Project are:
· Oblique and open views south across the site form the Yam O Wan;
· Direct and open views south towards the site within log pond at Yam O Wan;
· Open views towards north from Sunny Bay Interchange;
· Partial obstructed view form east of NLH and AEL;
· Partial view from west of NLH and AEL; and
· Full view of the proposed elevated slips overhead on NLH.
10.59 Details of the VSRs are provided below and summarised in Table 10.5.
· VSR1 are the drivers and passengers of vehicles using the NLH, AEL, DRL and Cheung Tung Road. They are having direct views towards the reclaimed area as when they travelling adjacent to the reclaimed area. When travelling from west to east, part of the elevated sections will be partially obstructed by the existing Traction Sub-station. Although they will only have a glimpse view of the structure, these receivers are relatively large in number due to high volume of traffic. Therefore, their sensitivity to change is high.
· VSR2 are the drivers and passengers of vehicles using the existing link roads 1 to 4 at Sunny Bay Interchange. They have direct views towards the elevated slip roads 5 and 6 crossing over on top of the existing transport corridor and partially obstructed view toward the reclaimed area by the existing Traction Sub-station. Similar to VSR1, they only will receive a glimpse view of the structure due to high speed of travel. The quantity of this group of VSR is less than those of VSR1 without the railway and therefore the sensitivity to change is medium.
· VSR3 are workers on vessels travelling on Yam O Wan. They have direct/oblique and open views towards the site; the existing Traction Sub-station obstructs part of view towards the elevated section of the slips roads. The visibility towards the site will decrease as their distance to the site increase. The local climatic conditions may also result in sea mist and reduce the visibility of the VSR 3 as well. The durations of views toward the site varies depending on the activities of the VSRs engaged. In general, the speed of travel is slower than those on the NLH and AEL and will have a more continuous viewing experience than VSRs 1 and 2. This group of VSR is employed in working activities where visual outlook plays a less important role to them; therefore the sensitivity to change is medium.
· VSR4 are travellers and visitors at Luk Keng Tsuen and Cheung Sok Island. For this group of VSRs, they will experience a combination of direct, oblique and partial obstructed views towards the site depending on their location. The existing Traction Sub-station obstructs part of view towards the elevated section of the slips roads as well. In addition, the Luk Keng Headland may partial obstruct the views towards the site. When compare to VSR3, this group of VSR are recreation in nature and their duration towards the site is longer. Therefore their sensitivity is considered high when compare to workers.
· VSR5 are the passengers, visitors and workers at the Sunny Bay PTI. They will experience oblique and partially obstructed view towards the site. Since the Sunny Bay PTI is for emergency purpose only, the sensitivity for this small group of VSR is considered to be low.
· VSR6 are passengers at Sunny Bay MTR Station. This group of VSR experience and direct open view toward the permanent portion of the Project. This duration of view towards the site is considered as medium due to the transfer nature. Their sensitivity to change is considered as medium.
· VSR7 are residents at Luk Keng Tseun. Generally, the villagers will have a greater sensitivity to change than the workers (VSR3), as the views towards the site will affect the resident’s general quality of their home environment. The residents will have a high sensitivity to change when compare to the workers.
· VSR8 are visitors at the future tourism gateway area in year 2016. They will experience oblique and partially obstructed view towards the site. Their duration of view will be various and will depend on their engaged activities. The advance screen planting on the eastern side of the proposed development will greatly reduce the sensitivity of this group of VSR to medium.
Table 10.5 Visual Sensitive Receivers – Sensitivity to Change and Visual Intrusion
·
VSRs |
Quantity of VSR |
Name |
Viewer Group |
Frequency of use |
Max. Staying Time |
Distance to the Project |
Frequency and Duration of View and Sources of Impact Type of View |
Value and Quality of Existing Views |
Available and Amenity of Alternative Views |
Sensitivity to Change and Visual Intrusion |
VSR1 |
Large |
Traffic from NLH, AEL, DRL Vpt 1 – View east from existing link road 1 Vpt 1.1 – View south-westward from road adjacent to AEL |
Passenger |
High during day and night |
10-15 seconds |
1 to 200m from North of NLH; 1 to 500m from west of NLH and 1to 750m from east of NLH |
Direct views towards the site. High frequency during day and night. Duration of view towards the site is short due to the high speed of travel. Since the roads are linear in nature, the proposed elevated road can be seem from both directions |
High Log pond and existing roads. |
Medium Green backdrops of hill knolls and ridge line with existing vehicular corridor as foreground. |
High |
VSR2 |
Large |
Traffic from Existing Link Roads 1 to 4 at high point Vpt2 – View north from existing link road 1 at high point |
Passenger |
High during day and night |
10-15 seconds |
Up to 700m |
Partial and obstructed views towards the site. High frequency during day and night. Duration of view towards the site is short due to high speed of travel. The proposed elevated roads can only be seen when travelling from south to north (i.e. going down-ramp) |
Medium Existing roads at roads and utility facilities such as Sunny Bay Traction Sub-station
|
Medium Sky and distant open water |
Medium |
VSR3 |
Small |
Marine traffic at Yam O Wan and log pond Vpt 3 – View east from log pond towards Yam O Wan PTI/Tourism Area Gateway Vpt 3.1 – View south from Yam O Wan towards log pond |
Workers |
Low during day and night |
12 hours |
Visual impact will reduce as the distance to the project increased |
Direct/Oblique and open views towards the site. The existing Traction Sub-station and other elevated roads blocks part of the view. Duration of views towards the site is varies depends on the activity they engaged. The visibility towards the site will decrease as their distance to the site increase. The local climatic conditions may also result in sea mist and reduce the visibility of the VSR3 as well. |
Medium Green backdrops and existing roads and elevated roads |
Medium Green backdrops of hill knolls and ridge line |
Medium |
VSR4 |
Small |
Luk Keng headland and Cheug Sok Island
|
Visitors |
Medium during day |
12 hours |
Up to 400m |
Combination of direct, oblique and partial obstructed views towards the site. Duration of views towards the site varies and depends on the VSR. |
Medium Green backdrops and existing roads and elevated roads |
Medium Green backdrops of hill knolls and ridge line |
High |
VSR5 |
Very Small
(For emer-gency only) |
Temporary Sunny Bay PTI
|
Workers |
Low during day and night |
24 hours |
Up to 900m |
Indirect/oblique views towards the proposed project because the development at this area will have visual nodes toward Sunny Bay. Duration of views towards the site varies and depends on the VSR. |
High Open Water |
Medium Open water and distant ridge lines |
Low |
VSR6 |
Large |
Sunny Bay MTR Station |
Visitors |
High during day and night |
15 min. |
Up to 100m |
Direct and open views toward the site, duration of view towards the site is short due to the transfer nature |
Medium Existing roadways and woodland |
Low Existing roadways and woodland |
Medium |
VSR 7 |
Small |
Residential Development at Luk Keng Tsuen (Note (1)) Vpt 4 – View from pier area at Yam O Wan |
Residents |
Medium during day and night |
24 hours |
Approx. 220 to 370m |
Combination of direct, oblique and partial obstructed views towards the site. Duration of views towards the site varies, depending on the VSR. |
High Green backdrops and existing roads and elevated roads |
Medium Green backdrops of hill knolls and ridge line |
High |
VSR8 |
Large |
Future tourism gateway area (to be open in 2016) |
Visitors |
High during day and night |
Varies, depends on visitor’s activities. |
Up to 900m |
Indirect and partial obstructed views towards the proposed project because the development at this area will have visual nodes toward Sunny Bay. Duration of views towards the site varies and depends on the VSR. |
High Existing roadways, woodland and open water |
Medium Open water and distant ridge lines |
Medium |
Note: (1) Luk Keng Tsuen contains approx. population of 13 people in accordance with the explanatory statement of North-East Lantau Outline Development Plan No. D/1-NEL/1.
(2) Definition/explanation on the rating/assessment is illustrated below.
Visual Sensitive Receivers – Magnitude of Change
Visually Sensitive Receiver (VSR) |
Proximity of receiver (1) |
Compatibility with the surrounding (2) |
Degree of change of view (3) Large Medium Low |
Landscape Context of the development (4) |
Particular visual backdrop from specific view points (5) Large Medium Low |
Scale of develop-ment in relation to the proximity of the receiver (6) Large Medium small |
Reversibility of change (7) |
Potential blockage of view (8) Large Medium Low
|
Duration of impact under construction and operation phase (9) |
Magnitude of change |
VSR1 |
Up to 200M |
Not compatible |
Medium |
Transport corridor |
Medium quality |
Large Scale |
Irreversible |
Medium |
Throughout both phase |
Moderate |
VSR2 |
700M |
Not compatible |
Medium |
Transport corridor |
Medium quality |
Small Scale |
Irreversible |
Medium |
Throughout both phase |
Moderate |
VSR3 |
Up to 700M |
Not compatible |
Medium |
Yam O Wan log pond |
High quality |
Small to Medium Scale |
Irreversible |
Medium |
Throughout both phase |
Moderate |
VSR4 |
Up to 400M |
Not compatible |
Large |
Woodland |
High quality |
Medium to Large Scale |
Irreversible |
Large |
Throughout both phase |
High |
VSR5 |
Up to 900M |
Not compatible |
Medium |
Transport interchange |
Medium quality |
Medium to large Scale |
Irreversible |
Low |
Throughout construction and early operation phase |
Low |
VSR6 |
Up to 100M |
Not compatible |
Medium |
MTR station |
Medium quality |
Medium to Large Scale |
Irreversible |
Medium |
Throughout both phase |
Moderate |
VSR7 |
Up to 400M |
Not compatible |
Large |
Village type development |
High quality |
Medium to Large Scale |
Irreversible |
Large |
Throughout both phase |
High |
VSR8 |
Up to 900M |
Not compatible |
Medium |
Tourism development |
Medium Quality |
Medium to Large Scale |
Irreversible |
Low |
Throughout operation phase only |
Moderate |
Notes:
1. proximity of receivers (distance between receiver and site)
2. the nature of the proposed development and its compatibility with the surrounding landscape
3. degree of change of views (extent of existing view changed by proposed development)
4. the landscape context of the proposed development (view of proposed development in relation to existing view background)
5. the particular visual backdrop to the development from specific important view points (view quality of existing backdrop)
6. scale of development: size of proposed development in relation to existing viewed area
7. reversibility of change to existing view
8. potential blockage of view (extent of obstruction of existing view)
9. duration of impacts under construction and operation phase
10.60 The broad statutory planning framework and intention for the proposed site is currently covered by the Approved North – East Lantau Outline Zoning Plan (OZP) No. S/I – NEL/9 exhibited on 5th July 2002.
10.61 The future Road P1 would connects to North Lantau Highway (NLH), Chuk Ko Wan Link Road (CKWLR) and Sunny Bay Road and is intended to perform a function similar to that of NLH as well as a primary access along the northern shore.
10.62 The north side of the assessment area (i.e. the Cheung Sok Island) is under ‘GB’ uses (Green Belt). The Cheung Sok Island is intended for conservation of the existing natural landscape features.
10.63 The non-statutory Planning Context indicated in the North-East Lantau Outline Development Plan (ODP No. D/1-NEL/1) was adopted in July 2002. The ODP was prepared on the basis of the recommendations of the Northshore Lantau Development Feasibility Study (NLDFS). The sites along the north side of NLH at Sunny Bay Reclamation area are mainly designated as ‘Tourism and Recreations Related Uses 1’ and zoned as Area 3A with possible use of hotel, and tourism related facilities. Area 3F to the east of Area 3A is designed as “G/IC” (Government, institution or community) zone. Below and adjacent to the Sunny Bay Interchange are also zone as “G/IC” to include a sewage pumping stations and irrigation booster pumping station to cater for Penny’s Bay development. The district open space (DO) along the Northshore includes the Sunny Bay Inlet for the future development of waterfront promenade, walkway and cycle track/tourism link. The Cheng Sok Island and Luk Keng Headland are zoned as “CA” (Conservation Area) to protect the natural vegetated upland, scenic coast and water inlet. The eastern and northern hillsides at Tai Shan are zones as “GB” (Green Belt) for the conservation of the existing natural landscape and scenic areas. The area fronting the main transport corridor is zoned at “OU” (other specified use) annotated “Amenity Area” to provide landscape corridors to screen off the temporary Sunny Bay PTI area.
10.64 The future-planning outlook of the assessment area will remain designated as a tourism gateway in year 2016. The natural environment of Luk Keng Headland, Cheng Sok Island and Yam o Wan Inlet will be preserved and protected. The proposed Road P1 Advance Work at Sunny Bay (formerly known as Yam O) would be likely to disturb the natural setting of Yam O Wan and result in a very substantial change to Yam O Wan Inlet. Mitigation measures such as careful planning of buffer planting zone and site layout would reduce the negative (both landscape and visual) impacts on surrounding environment.
10.65 Preliminary design of bridges and structures to be constructed under this Project had been presented to the Advisory Committee on the Appearance of Bridges and Associated Structures (ACABAS) on its 229th meeting. The aesthetic and landscaping proposal, which include the planting concept, the parapet proposal, the pattern on concrete columns and cladding panels on the steel columns and abutment wall were presented during the meeting. No major concerns was raised during the discussion and was consider acceptable subject to the detail submission of lighting proposal and parapet design in the future. The mitigation measures of this report are based on the materials presented and take into account comments from the Committee as well.
10.66 The Project is on reclaimed land and on existing transport corridor. Potential construction impact will be the reclamation at Yam O Wan removal of existing vegetation, building material delivery, site formation and construction of the elevated Slip Roads 5 and 6, at-grade Road A and Road P1 Roundabout. The construction work will commence in mid 2006 and complete in end 2008.
10.67 Sources of landscape impact will include:
· The reclamation activity at Yam O Wan;
· Construction works for the principal development of the elevated roads;
· The removal of existing vegetation for the build element and the related construction activity;
· Designation of temporary site areas for storage, plant cabins and associated site equipment;
· Temporary construction arrangements that affect access to adjacent areas.
10.68 A landscape impact is a physical change to an existing landscape character and resources. By mapping the extent and location of these changes, any loss or alteration can be addressed and, where possible, re-provisioned or compensated by landscape mitigation measures incorporated into a Project. The assessment of impact has made reference to the derived magnitude of change as in Table 10.6 and 10.7 and Figure 10.18.
10.69 Disturbance to the Yam O Wan:
· Reclamation activities will cover approximate 3 hectare of landscape recourses at Yam O Wan and will result in major disturbance to LE4 - open water, LE5 – coastline (550m) and LE6 – Log Pond and caused in a high magnitude of change;
· As LCU1 is a regionally significant character as discussed in baseline study with high sensitive, the impact during construction stage is considered substantial.
10.70 Disturbance to the Existing Transport Corridor:
· Pier foundations are located at the central median and in close proximity to NLH and AEL and will result in a mirror disturbance to LCU2.
· Very slight negative impact upon the LCU2 and landscape resources of the transport corridor (LCU2) as many existing pier foundations and structures are within the assessment area already.
10.71 Disturbance to the Existing Vegetation:
· Construction activities will comprise site formation and building of the proposed slip roads. Site formation includes clearance of the works area. Other sources of construction impacts will come from storage of construction materials and the movement of machinery. These construction activities will result in disturbance to vegetation at the transport corridor within LCU2. There are approximate 111 nos. of common roadside trees such as Eucalyptu robusta and Casuarina equistifolia found within the works limit and approx. 59 nos. of these trees will be lost, in addition to the lost of approx. 30 nos. of trees for the DRL’s contract within the assessment area. This will add minor disturbance to the LCU2. Mitigation of this impact is dealt with under the corresponding landscape mitigation measure as discussed in the Recommended Mitigation Measures.
· Although the Green Belt (LCU3A) and Conservation Area (LCU3B) have high landscape sensitivity as discussed in the baseline study, negligible impact was found upon these landscape resources as there is no pier foundations in this area.
10.72 Disturbance to the Utility Facilities:
· Negligible impact was found upon the landscape resources and character of the construction site of LCU4. The project will not interfere the existing utility facilities below and adjacent to the Sunny Bay Interchange and the existing Sunny Bay Traction Sub-station.
10.73 Disturbance to the Sunny Bay PTI/Future Tourism Area Gateway Area:
· The reclamation and construction activities will have impacts upon the construction site of Sunny Bay PTI (LCU5) due to site formation and temporary construction arrangements. The existing LCU5 will be re-constructed in future and the magnitude of change is considered low, therefore the impact upon it is very slight adverse.
10.74 Disturbance to landscape character units and resources are summarized in Table 10.6 and Table 10.7 and illustrated in Figure 10.18.
Table 10.6 Summary of Disturbance to Landscape Character Units
Compatibility with surrounding |
Duration of impacts |
Reversibility of change |
Magnitude of Change |
||
LCU1 - Yam O Wan |
Approximately 3 ha. reduction of the embay area of Yam O Wan
|
Not compatible |
Throughout construction period |
Irreversible |
High |
LCU2 – Existing Transport Corridor |
Pier foundations are located at the central median and in close proximity to NLH and AEL and existing vegetation need to be removed.
|
Medium compatible |
Throughout construction period |
Irreversible |
Low |
LCU3A – Green Belt of Tai Shan and Tai Yam Teng
|
No interaction |
Not compatible |
No interaction |
No interaction |
Negligible |
LCU3B - Conservation area of Luk Keng Headland and Cheng Sok Island
|
No interaction |
Not compatible |
No interaction |
No interaction |
Negligible |
LCU4 - Existing Utility Facilities
|
No interaction |
Medium compatible |
No interaction |
No interaction |
Negligible |
LCU5 - Temporary Sunny Bay PTI/Future Tourism Area Gateway
|
Temporary construction arrangement |
Medium compatible |
Throughout construction period |
Irreversible |
Low |
Table 10.7 Summary of Disturbance to Landscape Resources
LEs |
Type of Landscape Resources |
Total area/nos. within the project area |
Total Area/ Nos. interacted with the project Area |
Compatibility with surrounding |
Duration of Impacts |
Reversibility of change |
Magnitude of Change |
Approx. 111 nos. |
58 nos. to be fell |
Not compatible |
Throughout construction period |
Irreversible |
Moderate |
||
Approx. 2 ha |
No interaction |
Medium compatible |
No interaction |
No interaction |
Negligible |
||
Approx. 20 ha. |
Pier foundations are located at the central median and in close proximity to NLH and AEL |
Medium compatible |
Throughout construction period |
Irreversible |
Low |
||
Approx. 67 ha. |
Approx. 2 ha. |
Not compatible |
Throughout construction period |
Irreversible |
High |
||
Approx. 4000m long |
Approx. 550m Long |
Not compatible |
Throughout construction period |
Irreversible |
High |
||
Approx. 1 ha. |
Not compatible |
Throughout construction period |
Irreversible |
High |
|||
No interaction |
Not compatible |
No interaction |
No interaction |
Negligible |
10.75 Source of visual impacts include the following:
· Removal of existing vegetation within the site;
· Construction of site assess and traffic movement;
· Storage of building materials and stockpiling;
· Possible glares generated form the area flood light at night;
· Construction equipment and plant; and
· Temporary parking area on site, accommodation and working areas.
10.76 It is considered VSRs which located close to the construction works and the duration of time viewing to the site is long would receive either substantial or moderate adverse visual impacts. On this basis, VSRs in the following areas would be worst affected during the slip roads construction program;
· Drivers and passengers of VSR1 will have interrupted view eastwards and westwards by the construction machinery and reclamation process. This will cause the lost of view of the Yam O Wan and expose to visual glare from welding and site illumination. In addition, the lost of existing roadside trees may also reduce the visual quality along the traffic corridor and result in substantial adverse impact.
· Drivers and passengers of VSR2 will have interrupted view northwards by the construction machinery and reclamation process. This will cause the lost of view of the open sky and distant sea, as well as expose to visual glare from welding and site illumination and result in moderate adverse impact.
· The visitors at Luk Keng Headline and Cheung Sok Island (VSR4) and the residents at Luk Keng Tsuen (VSR7) will also experience interrupted view southwards by the construction machinery and reclamation; and visual glare from welding and site illumination as well. This will obstruct the view to the green drops to the south and result in substantial adverse impact.
· For VSR3, the visual impact during construction stage includes the obstruction of view to the green backdrops on the south side by construction machinery. As the visibility towards the site will decrease according to the distance from the site and the sensitivity of these group are relatively low (as discussed in the baseline study), the impact can be considered as moderate adverse when compare to VSRs 4 and 7.
· Visitors and passengers at Sunny Bay MTR Station (VSR6) will experience interrupted views southwards as well. This will obstruct the view to the green drops to the south and result in moderate adverse impact.
10.77 Slight Negative visual impact will be felt by the following groups of VSR:
· For VSR5, this small group of visually sensitive receiver will have a slight adverse impact due to the obstruction of view towards south to the greenery by construction machinery.
10.78 VSR8 will have no impact during construction stage as the Future Tourism Gateway Area is not constructed yet.
10.79 The proposed Project is a traffic corridor. Although the permanent elevated viaduct will intrude into the local context, the overall quality of the existing transport corridor will remain unchanged because the proposed elevated slip roads can blend in with the surrounding slip road structures. The loss of sea is an irreversible change upon the landscape resource of Yam O Wan; however with the full development of the Tourism Area Gateway in the future, the reclaimed land on Sunny Bay will be another tourism attraction node. The construction work will be completed in Year 2008 and the temporary section of the Project will be demolished to facilitate the implementation of Road P1 in about Year 2013. Cumulative landscape and visual impact will result from the construction and operation of the Temporary Sunny Bay PTI, DRL and utility facilities as describe in the baseline study.
10.80 The landscape impacts upon landscape resources and characters during operation stage are quantified and described below:
· Although the reclamation impact is irreversible, only 3 ha of the total of 89 ha of water area are affected. The remaining portion is remaining as a high quality landscape area; therefore substantial adverse impacts are considered for landscape characters units LCU1.
· Very slight adverse impacts upon the LCU2 as the elevated structure can blend in with the overall context of the man shade environment. The lost of existing trees can be compensation by additional planting subject to detail design in the future.
· Negligible impact upon landscape character units LCU3 and LCU4;
· Very slight adverse impacts upon landscape character units LCU5 as the overall context of the area is man shade and visual attraction at this location is towards the seaside.
10.81 Landscape impacts are summarised in Table 10.8 and illustrated in Figure 10.18.
Table 10.8 Summary of Landscape Impacts (without mitigation measures)
Landscape Character Unit |
Sources of Impact |
Magnitude of Change |
Landscape Sensitivity |
Impact Characteristic during Construction Phase |
Impact Characteristic during Operation Phase |
|
Construction |
Operation |
|||||
LCU1– Yam O Wan |
Construction and reclamation |
High |
High |
High |
Substantial adverse |
Substantial adverse |
LCU2 – Existing Transport Corridor |
Construction of proposed structure |
Low |
Low |
Low |
Very slight adverse |
Very slight adverse |
LCU3A– Green Belt of Tai Shan and Tai Yam Teng |
No interaction |
Negligible |
Negligible |
High |
Negligible |
Negligible |
LCU3B – Conservation Area of Luk Keng Headland and Cheung Sok Island |
No interaction |
Negligible |
Negligible |
High |
Negligible |
Negligible |
LCU4 – Existing Utility Facilities |
No interaction |
Negligible |
Negligible |
Low |
Negligible |
Negligible |
LCU5 - Temporary Sunny Bay PTI/Future Tourism Area Gateway |
Construction and reclamation |
Low |
Low |
Low |
Very slight adverse |
Very slight adverse |
Landscape Resources |
Sources of Impact |
Magnitude of Change |
Landscape Sensitivity |
Impact Characteristic during Construction Phase |
Impact Characteristic during Operation Phase |
|
Construction |
Operation |
|||||
LE1 - Roadside Tree |
Construction of proposed structure |
Moderate |
Moderate |
High |
Substantial adverse |
Substantial adverse |
LE2 - Industrial Utility |
No interaction |
Negligible |
Negligible |
Low |
Negligible |
Negligible |
LE3 – Existing Roadway |
Construction of proposed structure |
Low |
Low |
Low |
Very slight adverse |
Very slight adverse |
LE4– Open Water |
Construction and reclamation |
High |
High |
High |
Substantial adverse |
Substantial adverse |
LE5 – Coastline |
Construction and reclamation |
High |
High |
High |
Substantial adverse |
Substantial adverse |
LE6 – Log Pond |
Construction and reclamation |
High |
High |
High |
Substantial adverse |
Substantial adverse |
LE7 - Woodland |
No interaction |
Negligible |
Negligible |
High |
Negligible |
Negligible |
10.82 The sources of visual impacts during the operational stage will include the following:
· New superstructures of Slip Roads 5 and 6 crossing over the existing infrastructures cause visual intrusion;
· Obstruction of views to Yam O Wan and distant hills; and
· Glare from lighting.
10.83 The visual impacts in comparison to the baseline condition arising from the operation phase are discussed below. A summary of the visual impact is given in Table 10.9 and illustrated in Figures 10.16 and 10.19.
· VSR1 on train on the AEL and travel by vehicle on NLH will have a glimpse view of these two slip roads due to the fast travelling speed. These two slip roads will be seen in conjunction with Link Roads 1 to 4 at an acute angle, only the bottom part of the slip roads and the columns will be visible with the existing regulated slope as background view. When travelling from west to east, they will have a full view of the concrete sections of the proposed slip roads 5 and 6 overhead and partially block the sky view and the distant views towards the greenery and the log pond. When travelling from west to east, part of the elevated section will be partially obstructed by the existing Traction Sub-station. The steel sections of Slip roads 5 and 6 partially block the attractive view of log ponds along the rail. Alternative view for VSR1 will be the greenery of the hills on the southeast to southwest or the distant view of Luk Keng Headland of Cheung Sok Island depends on the direction of travel. The amenity value of the alternative is medium due to the existing elevated roads partially block the views towards the green backdrops as well. The visual impact is substantial adverse when considering the elevated portion of the road partially block the skyline overhead.
· VSR2 travelling at Sunny Bay Interchange area will have moderate adverse impact as they will see the elevated Slip Roads 5 and 6 flying over the Sunny Bay MTR station and other superstructures, which result in partially blocking the sky view and Yam O Wan when going down ramp. VSR2 can enjoy the distant greenery and open sea as an alternative view for a temporary visual relief.
· The Slip Road 5 up-ramp and Slip Road 6 down-ramp will cause a visual intrusion for VSR 3, VSR4 and VSR7 when view from Yam O Wan, Luk Keng Headland and Cheung Sok Island. The elevated part of the slip roads will be partially obstructed by the existing Sunny Bay Traction Substation. The elevated slip roads will be seen together with existing link roads 1, 2, 3 and 4 as an overall context with the surrounding superstructure except at the portion where the elevated road are flying over the existing ones.. Alternative view option for these groups of VSRs will be the greenery behind existing roads, and the quality is considered to be medium due to the existing infrastructures slightly obstruct the lower part of the hills. Depending on the local climatic conditions, sea mist may be presence to obstruct the views towards the proposed site. For VSR3, when they view towards the site form a long distance, the massive green backdrops will usually take the attentions of the viewers away from the transport corridor. Although the quantity of these VSRs is small, their view towards the site is longer than those of VSRs 1 and 2. Since VSR3 are occupational in nature, their sensitivity to change is relatively lower than VSRs 4 and 7. In consequence, the visual impact for VSR3 is moderate adverse and substantial adverse for VSR4 and VSR7.
· As the temporary Sunny Bay PTI (VSR5) and future Tourism Area Gateway (VSR8) have major visual nodes/attentions towards the seaward side of Sunny Bay, as well as the provision of landscape corridors and additional landscape planting to screen off the area; therefore VSR5 will only receive very slight adverse impact when view towards the proposed development while VSR8 will have moderate adverse impact when compare to the quantity of VSRs between these 2 groups.
· VSR6 travelling at Sunny Bay MTR station will have moderate adverse impact as they will see the elevated Slip Roads 5 and 6 and other superstructures, which result in partially blocking the sky view and Sunny Bay.
· Although the existing mass will form a solid background for the proposed new roads, the exposed portion of the proposed elevated structure is higher than the existing ones. This will partially block the skyline for VSRs 1 and 2; and will directly block the middle part of green backdrops of Tai Shan and Tai Yam Teng for VSRs 3, 4 and 7. At such great height, the exposed portion will result a substantial adverse visual impact to VSRs.
· Although the loss of sea and the elevated roads are an irreversible change, after the full development of the Tourism Area Gateway in the future, the reclaimed land on Yam O Wan will be served as another localised attractive view for the visually sensitive receivers.
· Cumulative adverse visual impacts will result from the permanent intrusion of the existing elevated slip roads at the background and possibly from the proposed utility facility.
10.84 Night time glare is potentially a significant visual impact. Yet, permanent lighting of the elevated viaduct is required to meet the safety and security requirement. The lighting requirement for these types of facilities are standard, they will be similar to those used on the existing link roads and those on NLH. The impact of night time glare for the proposed project will be reduced by its absorption into the overall and existing night time of the neighbouring traffic corridor and construction site. A slight cumulative impact from the night time glare is anticipated with the completion and operation of the Temporary Sunny Bay PTI. It is predicted that the magnitude of change will be small resulting in slight negligible adverse impact upon all the VSRs.
Table 10.9 Summary of Visual Impacts (without mitigation measures)
VSRs |
Quantity of VSR |
Viewer Group |
Value of Existing Views |
Availability and amenity of alternative view |
Receiver Sensitivity |
Magnitude of Change |
Impact characteristic during construction stage |
Impact characteristic during operation stage |
|
Construction |
Operation |
||||||||
VSR1 – North Lantau Highway and Railway |
Large |
Passenger |
High |
Medium |
High |
Moderate |
Moderate |
Substantial adverse |
Substantial adverse |
VSR2 – Existing Link Roads 1 to 4 |
Large |
Passenger |
Medium |
Medium |
Medium |
Moderate |
Moderate |
Moderate adverse |
Moderate adverse |
VSR3 – Marine Traffic within Yam O Wan |
Small |
Workers |
Medium |
Medium |
Medium |
Moderate |
Moderate |
Moderate adverse |
Moderate adverse |
VSR4 – Luk Keng and Cheung Sok Island |
Small |
Recreational |
Medium |
Medium |
High |
High |
High |
Substantial adverse |
Substantial adverse |
VSR5 –Temporary Sunny Bay PTI |
small |
Occupational |
High |
Medium |
Low |
Low |
Low |
Slight adverse |
slight adverse |
VSR6 – Sunny Bay MTR Station |
Large |
Travellers |
Medium |
Low |
Medium |
Moderate |
Moderate |
Moderate adverse |
Moderate adverse |
VSR7 -- Residents at Luk Keng and Cheung Sok |
Small |
Residential |
High |
Medium |
High |
High |
High |
Substantial adverse |
Substantial adverse |
VSR8 – Future Tourism Gateway |
Large |
Visitors |
High |
Medium |
Medium |
No interaction |
Moderate |
No interaction |
Moderate adverse |
10.85 The assessment in the previous section predicts that the majority of landscape impacts both during construction and the initial operation stage are predicted as substantial to very slight negative because of the reclamation process and the intrusion of the permanent elevated structures upon the transport corridor. Impacts on the visual resources and VSRs are also predicted to be moderate to very slight adverse primary due to the visual intrusion of the permanent elevated roads and the construction works on the reclaimed area.
10.86 The key source landscape impact arises from reclamation and construction activity, such as site formation, building material delivery, stockpiling, and associated facilities, as well as the loss of sea. The key source of visual impact is the permanent intrusion of the viaduct in the views from all VSRs.
10.87 Figure 10.20 and Figure 10.21 illustrate the landscape layout plan and sectional views of the Project. Generally, the recommended mitigation measures (LMM) seek to minimize potential impacts of the structures development, to soften the hard edges of the new structures and provide compensation in the form of environmental improvements to offset the adverse effects of the project.
10.88 The landscape concept plan aims to provide the maximum level of landscape and visual mitigation for the assessment area and, in so doing, result in the minimisation of the landscape and visual impacts at the operational stage. Details of the landscape design should be subject to further study during the detailed design stage.
10.89 Recommended mitigation measures during construction should include the following general mitigation measures:
· LMM1 - provide advance screen planting, if possible subject to detailed design stage and minimize felling of existing road side trees;
· LMM2 - sensitively designed site hoarding in both colour and form to help screen views of construction works;
· LMM3 - operational time restrictions to limit after-dark welding and lighting; and
· LMM4 - minimize night time glare, only applied for safety, limit light intensity on site during construction stage for security reason. The lighting requirement for the project should be compatible with Highways Standard and will be similar to those used on existing link roads and those on NLH to reduce night time glare during operational stage as well.
10.90 To minimize the impact on landscape a visual features, proper provision of mitigation measures during the design stage would result in a visually more compatible design when viewed at adjacent environment. Subject to the detailed design, possible mitigation measures to be considered during design stage should include:
· LMM5 - Trees such as Casuarinas equisetifolia and Hibiscus tiliaceus with broad canopy, salt/wind tolerated species and fast growing type to secure the survival rate along coastal line;
· LMM6 – At the lower level when concrete columns/abutments are located, tall evergreen trees are proposed to soften the vertical element. Planting should also be provided along the coastal line of the reclamation to soften the man-made structures viewed from marine traffic at Yam O Wan;
· LMM7 - Edge parapets and columns of bridge structures should adopt similar colour and shape as the existing the existing Link Roads 1 to 4 located at the Sunny Bay interchange area;
· LMM8 - Select finish pattern of concrete columns of similar to the existing bridge columns at Sunny Bay interchange area, i.e. rib pattern finish. The rib pattern finish at concrete columns would soften the overall appearance of the bridge; and
· LMM9 - Glass fibre reinforced concrete (GFRC) cladding panels with rubble stone patterns are recommended to apply on columns and abutment supporting the steel bridge in order to enhance the visual appearance of the steel decking. The rubble stonewall pattern can provide a nature setting in relationships among the sea and distant hillsides. At lower portion of the ramp and surrounding the abutment, screen planting with broad canopy tree and lower story shrub planting will help to reduce the visual intrusions as well.
Proposed Planting Palette
Species |
Form |
Colour |
Size |
-Casuarinas equisetifolia |
Conical |
Light green |
Heavy standard |
-Hibiscus tiliaceous |
Oval ball |
Dark green |
Heavy standard |
-Delonix regia |
Spreading free |
Medium green |
Heavy standard |
-Bauhinia spp |
Open free |
Medium green |
Heavy standard |
-Cerbera manghas |
Oval ball |
Dark standard |
Standard |
-Ficus elastica |
Spreading free |
Dark standard |
Standard |
-Roystonea regia |
Palm |
Light green |
5 M High |
-Phoenix roebelenii |
Palm |
Medium green |
5 M High |
-Archontophoenix alexandrae |
Palm |
Medium green |
5 M High |
10.91 At works constructed under this project are located at a rather man-made transport network interchange and the outmost important measures which could minimize the landscape and visual impact to the landscape units and resources are to provide regular maintenance of the landscape planting along roadside. In addition, it is also worth-noted that careful planning and design of Sunny Bay Tourism Area Gateway during implementation of this tourism node are necessary to minimize further cumulative impacts upon landscape character and resources.
10.92 Summary programming, funding, implementation, management and maintenance agents of landscape and visual mitigation measures is shown in Table 10.10.
Table 10.10 Summary Landscape Mitigation Measures Programming, Funding, Implementation, Management and Maintenance Agents
LMM |
Description of Landscape Mitigation Measure |
Programming |
Funding and Implementation Agent |
Management and Maintenance Agent |
|
LMM1 |
Provide advance screen planting, if possible subject to detailed design stage and minimize felling of existing road side trees |
Construction stage |
Project Proponent / Contractor |
Contractor |
|
LMM2 |
Sensitively designed site hoarding in both colour and form to help screen views of construction works |
Construction stage |
Project Proponent / Contractor |
Contractor |
|
LMM3 |
Operational time restrictions to limit after-dark welding and lighting |
Construction stage |
Project Proponent / Contractor |
Contractor |
|
LMM4 |
Minimize night time glaze, only applied for safety, limit light intensity on site |
Construction and Operation stage |
Project Proponent / Contractor |
Contractor |
|
LMM5 |
Selection of fast growing, wind and salt tolerated, broad canopy trees and lower story shrub mixes |
Design Stage |
Project Proponent |
LCSD(Confirmed) |
|
LMM6 |
Provide planting along the edges of reclamation, at low level of columns/abutments at the reclamation area to soften and screen the bridge structures and columns |
Design Stage |
Project Proponent |
LCSD(Confirmed) |
|
LMM7 |
Design edge parapets and columns of bridge structures in similar shape and colour to existing bridge structures in the Sunny Bay interchange area |
Design Stage |
Project Proponent |
Highways Department (Confirmed) |
|
LMM8 |
Provide rib pattern finish to concrete columns |
Design Stage |
Project Proponent |
Highways Department (Confirmed) |
|
LMM9 |
Provide cladding panels, in glass fibre reinforced concrete with rubble stone patterns subjected to detailed design, at columns and abutment walls support the steel decking section of Slip Roads 5 and 6 |
Design Stage |
Project Proponent |
Highways Department (Confirmed) |
|
10.93 The proposed project with elevated slip roads and at-grade road are compatible with the existing zoned “DO” as Area 3A will be part of the tourism area gateway in the future. The proposed mitigation measures will help to reduce substantial adverse to slight adverse impact during construction and operational stage.
10.94 A summary of residual landscape impact is shown in Table 10.11. In general, the incorporation of mitigation measures into the proposed projects will be effectively in reducing the “substantial adverse down to moderate adverse” impact at the construction stage and ‘substantial adverse down to moderate adverse’ at the operational stage as well. The assessment indicates that the loss of sea is an irreversible change and despite this fact, there will be no significant effects on the landscape caused by the appearance of the project.
10.95 A summary of Residual Visual Impact is shown in Table 10.12. The incorporation of mitigation measures in the proposed project will effectively reduce construction and operational visual impact to moderate adverse. The exposed portion of the proposed elevated road above the existing elevated roads is intruding into the existing skyline when view from the traffic corridor below, and when viewed from across Yam O Wan, this portion can not be hidden behind the existing elevated structure. However, this exposed portion is relatively short in length when compare to the whole length of the development. The remaining portion would blend in with other man-made contexts with the implementation of mitigation measure. The assessment concluded that despite the fact that the intrusion of elevated viaducts is irreversible change, there will be no significant visual effects caused by the appearance of the project.
10.96 The proposed project incorporates landscape and visual mitigation measures which will reduce the overall adverse level of visual impact to an acceptable level. Advance buffer planting work along the reclamation area will enhance the local visual quality for the villagers at Luk Keng Tsuen.
10.97 Night time glare is considered to be acceptable within the visual envelop. The change to the baseline condition will be negligible.
10.98 Careful phasing of the tree transplanting and/or advance boundary screen planting would reduce the impact of the loss of roadside trees, thus maximize the buffering effect along the perimeter of the assessment area.
10.99 Within the planning context of ‘Tourism Area Gateway’, the proposed Project is predicted to be acceptable with landscape and visual mitigation measure implemented.
Table 10.11 Summary of Residual Landscape Impact with recommended mitigation measure – Landscape Character Unit (LCU)
LCUs |
Residual Landscape Impact Without Mitigation Measure |
Recommended Mitigation Measures |
Residual Landscape Impact With Mitigation Measures |
||
Construction Stage |
Operation Stage |
Construction Stage |
Operation Stage |
||
LCU1 |
Substantial adverse |
Substantial adverse |
LMM1 to LMM6 - New planting along the newly redefined coastline as a compensation to the intrusion of the existing coastline. |
Moderate adverse
|
Moderate adverse
|
LCU2 |
Very slight adverse |
Very slight adverse |
LMM1 to 4 & 6 to soften the hard edges and to compensate the trees to be felled. |
Very slight adverse |
Very slight adverse |
LCU3A |
Negligible (no interaction) |
Negligible (no interaction) |
- |
Negligible (no interaction) |
Negligible (no interaction) |
LCU3B |
Negligible (no interaction) |
Negligible (no interaction) |
|
Negligible (no interaction) |
Negligible (no interaction) |
LCU4 |
Negligible (no interaction) |
Negligible (no interaction) |
- |
Negligible (no interaction) |
Negligible (no interaction) |
LCU5 |
Very slight adverse |
Very slight adverse |
LMM1 to 6 to provide more greenery for visitors in this area in the future. |
Negligible |
Negligible |
Table 10.11 Summary of Residual Landscape Impact with recommended mitigation measure – Landscape Resources (LE)
LCUs |
Residual Landscape Impact Without Mitigation Measure |
Recommended Mitigation Measures |
Residual Landscape Impact With Mitigation Measures |
||
Construction Stage |
Operation Stage |
Construction Stage |
Operation Stage |
||
LE1 |
Substantial adverse |
Substantial adverse |
LMM1 to LMM6- to compensate the lost of felled trees |
Negligible (affected trees are permanently removed) |
Negligible |
LE2 |
Negligible (no interaction) |
Negligible (no interaction) |
- |
Negligible (no interaction) |
Negligible (no interaction) |
LE3 |
Very slight adverse |
Very slight adverse |
LMM1 to 4, 6 to 9 to adopt similar finishing scheme of existing road to the proposed road can reduce the level of intrusion by blending the elevated road into the surrounding |
Negligible |
Negligible |
LE4 |
Substantial adverse |
Substantial adverse |
LMM1 to LMM6- to minimalism further disturbance to the open water. Screen planting to soften the edge of the reclaimed land and as a compensation to the lost of open water |
Substantial adverse |
Substantial adverse |
LE5 |
Substantial adverse |
Substantial adverse |
LMM1 to LMM6 and 9- ne coastline with screen planting to soften the edge of the reclaimed land and as a compensation to the lost of coastline |
Substantial adverse |
Substantial adverse |
LE6 |
Substantial adverse |
Substantial adverse |
LMM1 to LMM6- to minimalism further disturbance to the open water. Screen planting to soften the edge of the reclaimed land and as a compensation to the lost of open water |
Substantial adverse |
Substantial adverse |
LE7 |
Negligible (no interaction) |
Negligible (no interaction) |
- |
Negligible (no interaction) |
Negligible (no interaction) |
Table 10.12 Summary of Residual Visual Impact with recommended mitigation measure
VSRs |
Residual Visual Impact Without Mitigation Measures |
Recommended Mitigation Measures |
Residual Visual Impact With Mitigation Measures |
||
Construction stage |
Operation stage |
Construction stage |
Operation stage |
||
VSR1 |
Substantial adverse |
Substantial adverse |
LMM2 to 8 To reduce the level of visual intrusion by adapting the similar design of the existing elevated roads and to soften /screen the columns by planting |
Moderate adverse |
Moderate adverse |
VSR2 |
Moderate adverse |
Moderate t adverse |
LMM 2 to 8 |
Slight adverse |
Slight adverse |
VSR3 |
Moderate adverse |
Moderate adverse |
LMM 1 to 9 |
Slight adverse |
Slight adverse |
VSR4 |
Substantial adverse |
Substantial adverse |
LMM 1 to 9 Advance screen planting to reduce the level of visual intrusion during construction stage and benefits from bigger size trees as buffer planting during operational stage |
Moderate adverse |
Moderate adverse |
VSR5 |
Slight adverse |
Slight adverse |
LMM 2 to 9 |
Very slight adverse |
Very slight adverse |
VSR6 |
Moderate adverse |
Moderate adverse |
LMM 2 to 8 |
Slight adverse |
Slight adverse |
VSR7 |
Substantial adverse |
Substantial adverse |
LMM 1 to 9 Advance screen planting to reduce the level of visual intrusion during construction stage and benefits from bigger size trees as buffer planting during operational stage |
Moderate adverse |
Moderate adverse |
VSR8 |
No interaction |
Moderate adverse |
LMM 2 to 9 Benefit from advance screen planting during operational stage |
No interaction |
Slight adverse |
10.100 The implementation and maintenance of the landscape compensatory planting measures is a key aspect and should be checked to ensure that the proposal are fully realised. It is recommended that detail design, implementation, and operational maintenance of all the proposed landscape and visual mitigation measure are included within the EM&A. In the design stage EM&A will consist of auditing the detailed landscape design. Construction and operational stage EM&A will comprise audit of the compensatory planting and planting establishment in the form of site inspection.
10.101 Baseline monitoring for the landscape and visual resources will comprise a vegetation survey. An assessment of the landscape character will be made against which future change can be monitored.
10.102 A competent Landscape Architect should be employed for the implementation of landscape construction works particularly during subsequent maintenance operations during the 12 month establishment period during the operational stage
10.103 All measures undertaken by both the contractor and the landscape contractor during the construction stage and a Landscape Architect, as a member of the Environmental Team, shall audit the first year of the operational stage. This shall be completed on a regular basis to ensure compliance with the intended aims of the EIA.
10.104 Summary of the implementation and funding schedule of the landscape mitigation measures is summarized in Section 13.
10.105 The Project would require reclamation of approximate 3 ha. of sea area at Yam O Wan and construction of two approximately 1km long elevated bridges over the existing North Lantau Highway and Airport Express Line and connect to the at-grade Road P1 Roundabout formed on the reclaimed land. The elevated bridges structures are located at about 32m above existing ground level and when viewed from the road level of NLH, the structures are at an average of 25m above.
10.106 The primary visual impacts will be the obstruction to the views of Sunny Bay and woodlands when viewed by marine traffic outside Yam O Wan. The elevated Slip Roads 5 and 6 will cause the majority of visual obstruction. However, landscape treatment at lower level of the superstructure can provide visual-relief effect for travellers and the majority of visual impacts would be minimized.
10.107 The proposed Project would inevitably disturb the natural settings and scenery during both the construction and operation phases. Major landscape resources and landscape characters that would have the most disturbance is the open water at Yam O Wan Inlet which are visually pleasurable.
10.108 The assessment predicted that the reclamation and construction works would have negative impacts upon the landscape character and resources over marine traffic and the development at Yam O Wan. Travellers and road users along Airport Express Line, North Lantau Highway and associated road network would feel moderate to slight adverse visual impacts without mitigation measures.
10.109 The magnitude of negative impact on both landscape and visual quality due to the proposed reclamation and construction works would be reduced if proper mitigation measures were implemented during construction and operation phases. Major mitigation measures include good site practices during construction phase; provision of an international standard of soft landscape and ensure regular maintenance of planting are provided during operation of the Project.
10.110 The landscape and visual impact due to the proposed reclamation works at operation phase would be the loss of part of Yam O Wan. With proper mitigation measures, such as advance screen planting to reduce the level of intrusion to surrounding, the adverse landscape impact upon the landscape resources and character at Yam O Wan will be reduced from substantial during construction stage (without mitigation measures) to moderate adverse in operation stage. The provision of an international quality soft landscape treatment would inevitably reduce the moderate adverse visual impact in the construction stage to slight adverse in the operational stage. Since most of the features identified within the project area are man-made structures such as road network, viaducts, railway tracks, railway stations and transport interchange, it is considered with implementation of mitigation measures, the change brought by the Project would be reduced in visual term and therefore the residual impact was considered as an acceptable impact as the works would blend in with the overall man-made context of the adjacent development. In conclusion, the overall landscape and visual impacts associated with the Road P1 Advance Works are deemed to be acceptable with proper implementation of the mitigation measures as required in Annexe 10 of the EIA TM.