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S.16 Application for Proposed Underground Stormwater Drainage Pipe and Excavation and Back-filling of Land on Government Land on Tam Kon Chau Road in DD101 and 104, Mai Po, Yuen Long Planning Statement World Wide Fund for Nature (Hong Kong) PlanArch Consultants Limited AECOM Asia Company Limited China Hong Kong Ecology Consultants Limited March 2021

S.16 Application for on Tam Kon Chau Road in DD101 and 104

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Page 1: S.16 Application for on Tam Kon Chau Road in DD101 and 104

S.16 Application for

Proposed Underground Stormwater Drainage Pipe and

Excavation and Back-filling of Land on Government Land

on Tam Kon Chau Road in DD101 and 104,

Mai Po, Yuen Long

Planning Statement

World Wide Fund for Nature (Hong Kong)

PlanArch Consultants Limited

AECOM Asia Company Limited

China Hong Kong Ecology Consultants Limited

March 2021

Page 2: S.16 Application for on Tam Kon Chau Road in DD101 and 104

Executive Summary

On behalf of The World Wide Fund for Nature Hong Kong (WWF-HK), this

planning statement is prepared in support of an S.16 application to the Town

Planning Board (TPB) for the proposed underground stormwater drainage pipe in

the Government Land along Tam Kon Chau Road in DD101 and DD104, Mai Po,

in support of the rebuilding of the field studies centre.

The proposed underground stormwater drainage pipe is an essential infrastructure

to support the new field studies centre and the on-going development of WWF-

HK’s education programme. The existing stormwater drainage system at the field

studies centre has an outfall to discharge surface run-off to a nearby fish pond and

it was approved by Buildings Department (BD) in 1989. However, since the fish

pond is under private ownership, Drainage Services Department (DSD) suggested

the applicant to design a more reliable and permanent proposal for proper drainage

discharge since the status of the nearby fish pond may change over time. Hence,

the proposed underground stormwater drainage pipe will connect the new surface

run-off drainage system within the field studies centre to a nearby natural stream

agreed by DSD to provide reliable and permanent outfall for the surface run-off

discharge from the site.

Based on the approved Mai Po and Fairview Park Outline Zoning Plan No. S/YL-

MP/6, the majority of the proposed underground stormwater drainage pipe falls

within “Conservation Area” (“CA”) zone (about 128m in length) together with a

small portion in “Government, Institution or Community” (“G/IC”) zone (about

14m in length). Since the proposed underground stormwater drainage pipe is

regarded as “Utility Installation for Private Project” and it is a Column 2 use under

“CA” zone and “G/IC” zone, it requires permission by the Town Planning Board

(TPB) under Section 16 (S.16) of the Town Planning Ordinance. Besides, it

involves excavation and back-filling of land in “CA” zone (about 147.2sq.m.) for

laying of pipes, which would require the permission from the Town Planning

Board.

The proposed underground stormwater drainage pipe is a well-thought out

proposal in terms of the design, scale and extent of work, as well as the

construction method, to ensure that no adverse impact will be caused to the

Wetland Conservation Area and its biodiversity.

Since the construction works for the proposed use will be carried out on a concrete

paved road and the extent of works area and excavation has been minimized, it is

anticipated that neither wetland habitat area nor function of the wetlands in this

part of the Wetland Conservation Area will be adversely affected by the proposed

use. The proposed underground stormwater pipe will be installed underground

that it will not cause adverse impact to visual quality.

Page 3: S.16 Application for on Tam Kon Chau Road in DD101 and 104

All relevant statutory requirements for the construction and implementation of the

proposed underground stormwater drainage pipe will be complied with. In

addition, the Works Contractor shall follow good site practice and be responsible

for the design, construction, operation and maintenance of applicable mitigation

measures specified in ProPECC PN 1/94 for construction site drainage during

construction.

Since location, construction methods and approaches for the proposed use has

been carefully considered to prevent/minimize any potential impacts to wildlife

and the surrounding environment, no adverse impact on visual quality, drainage,

environment and ecology is envisaged.

Therefore, in support of the effort to upgrade the essential infrastructure of the

field studies centre and thereby enabling WWF-HK’s mission and commitment to

provide professional wetland management training, deliver education programmes

that empowers students and the general public to recognize the value of nature,

getting insights on how people and nature can thrive and the urgency needed to

restore biodiversity, members of the Town Planning Board are respectfully

requested to give favorable consideration to the application.

Page 4: S.16 Application for on Tam Kon Chau Road in DD101 and 104

行政摘要

此計劃書乃為支持世界自然(香港)基金會(下稱「基金會」) 就配合有關野外研習中心重建項目而於元朗米埔丈量約份 101 及 104、担竿洲路的政府土地設置的擬議地下雨水渠,而根據城市規劃條例第 16 條遞交的規劃許可申請。

擬議地下雨水渠是配合新野外研習中心及基金會於米埔自然保護區內發展公衆教育的必須進行基礎設施。野外研習中心内的現有雨水渠系統的排水口與附近的魚塘連接,而此渠務安排已由屋宇署於 1989 年核准。然而,即使該魚塘屬於私人業權而申請人亦可以取得業主的同意,渠務署建議申請人提供一個更可靠及能永久使用的設計,使雨水能夠妥善排放,不會因爲業權變更而受到影響。擬議地下雨水渠將與野外研習中心内的新雨水渠系統連接,並會於附近的溪澗排出。渠務署對此渠務安排亦表示同意。

根據米埔及錦綉花園分區計劃大綱核准圖(編號 S/YL-MP/6),擬議的地下雨水渠的地點大部分位於「自然保育區」(約 128 米長)及小部分為於「政府、機構或社區」(約 14米長)地帶。擬議地下雨水渠為「私人發展計劃的公用設施裝備」用途,屬於相關分區計劃大綱核准圖的「自然保育區」及「政府、機構或社區」地帶的第二欄用途,需要根據城市規劃條例第 16 條獲得城市規劃委員會的批准。此外,擬議用途於「自然保育區」的相關挖掘及回填泥土工序(範圍約 147.2平方米)亦需要獲得城市規劃委員會的批准。

擬議的地下雨水渠就工程的設計、規模、範圍都已作出嚴謹及適切的考慮。有關的施工方法都經細心考慮,不會為濕地保育區的環境及生物多樣性帶來不良影響。 由於擬議地下雨水渠的施工位置處於現時混凝土鋪設的道路上,同時已縮小施工及挖土範圍,預期不會影響濕地保育區濕地的「功能」和「面積」。擬議地下雨水渠將會設於地底,不會構成不良的視覺影響。

所有有關擬議地下雨水渠的施工及運作的法定要求都會遵守。此外,施工時建造承辦商會遵循良好的工地守則,並為《建築工地的排水渠(專業守則1/94)》中列明針對建築地盤排水的緩解措拖的工程設計、運作和維修負責。

擬議地下雨水渠的地點、施工方法及形式已審慎考慮預防/減低任何對自然生態及周邊環境的影響,故此不會引致景觀、渠務、環境及生態帶來不良影響。

擬議地下雨水渠為配合野外研習中心及基金會於米埔自然保護區內發展公衆教育的必須進行基礎設施,讓基金會可以繼續其使命及承諾,提供濕地管理訓練,並為學生及市民提供教育活動來認識大自然的重要性,以及明白人類與大自然共融的方法和修復生物多樣性的逼切需要。就以上理據,敬希城市規劃委員會通過此申請。

Page 5: S.16 Application for on Tam Kon Chau Road in DD101 and 104

S16 Application for Proposed Underground Stormwater Drainage Pipe and

Excavation and Back-filling of Land on Government Land in DD101 and DD104,

Mai Po PlanArch Consultants Ltd.

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1 INTRODUCTION

1.1 On behalf of The World Wide Fund for Nature Hong Kong (WWF-HK),

PlanArch Consultants Ltd. submits a S.16 application to the Town Planning

Board (TPB) for the proposed underground stormwater drainage pipe in

DD101 and DD104 in Mai Po, in support of the rebuilding of the field studies

centre in “Government, Institution or Community” (“G/IC”) zone according to

the approved Mai Po & Fairview Park Outline Zoning Plan No. S/YL-MP/6.

Existing use of “Field Study / Education / Visitor Centre” at the field studies

centre will remain unchanged as specified in the Short Term Tenancy no.1159

Government Land in D.D.101 signed 27th

December 2019 and it is an

always-permitted use which does not require planning permission to the Town

Planning Board (TPB).

1.2 Since there is no public stormwater drainage system in the vicinity of the new

field studies centre for connection or discharge, upgrading of new field studies

centre would require a new drainage system to replace existing arrangement

for proper and permanent discharge of surface run-off from the new field

studies centre.

1.3 Based on the concerned Outline Zoning Plan, the majority of the proposed

underground stormwater drainage pipe falls within “Conservation Area”

(“CA”) zone, together with a small portion in “Government, Institution or

Community” (“G/IC”) zone. Since the proposed underground stormwater

drainage pipe is regarded as “Utility Installation for Private Project” and it is a

Column 2 use under “CA” zone and “G/IC” zone, it requires permission by the

Town Planning Board (TPB) under Section 16 (S.16) of the Town Planning

Ordinance. Besides, excavation and back-filling of land for laying of pipes

within “CA” zone would require permission by the Town Planning Board.

1.4 In support of the application, this planning statement sets out the site

background, outlines the development proposal and gives justifications for the

proposed infrastructure upgrade project. The structure of the planning

statement is as follow:

Section 2: introduces the site context of the proposed underground

stormwater drainage pipe as “Utility Installation for Private

Project” (the “proposed use”);

Section 3: describes the background and details of the proposal;

Section 4: lays out the technical justifications;

Section 5: Provides the planning justifications and planning gains for the

proposed use; and

Section 6: concludes the above discussion and requests for the approval

of proposed use.

Page 6: S.16 Application for on Tam Kon Chau Road in DD101 and 104

S16 Application for Proposed Underground Stormwater Drainage Pipe and

Excavation and Back-filling of Land on Government Land in DD101 and DD104,

Mai Po PlanArch Consultants Ltd.

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2 SITE CONTEXT

2.1 The Application Site

The proposed location for the underground stormwater drainage pipe is located

in the Government Land in D.D. 101 and D.D.104 in Mai Po, which extends

from the new field studies centre to a nearby stream (Photos 1, 2 & 3). The

alignment of the proposed underground stormwater drainage pipeline is about

142m long (Plan 1).

2.2 Land Use Zoning

According to the concerned OZP, majority of the proposed underground

stormwater drainage pipe falls within “Conservation Area” (“CA”) zone

(about 128m in length and 147.2sq.m. in area), together with a very small

portion in “Government, Institution or Community” (“G/IC”) zone (about 14m

in length and 16.1sq.m. in area). The proposed use is regarded as “Utility

Installation for Private Project”, which is a Column 2 use under the “CA” zone

and “G/IC” zone. In addition, excavation and back-filling of land in “CA”

zone would require permission by the TPB.

Planning intention of “CA” zone is to “conserve the ecological value of

wetland and fish ponds which form an integral part of the wetland ecosystem

in the Deep Bay Area. The “no-net-loss in wetland” principle is adopted for

any change in use within this zone. The primary intention is to discourage

new development unless it is required to support the conservation of

ecological integrity of the wetland ecosystem or the development is an

essential infrastructure project with overriding public interest.”

The “G/IC” zone is “intended primarily for the provision of Government,

institution or community facilities serving the needs of the local residents and

the district population.”

2.3 Town Planning Board Guidelines No.12C - Wetland Conservation Area

According to the Town Planning Board Guideline No. 12C (TPB PG-No. 12C),

the application sites fall within the Wetland Conservation Area (WCA). The

principle of “no-net-loss in wetland” applies and it can be referred to both loss

in “area” and “function”. Land uses in WCA should be related to

conservation management of the wetland area, environmental education, and

essential infrastructure projects.

In addition, it is noted that “new development within the WCA would not be

allowed unless it is required to support the conservation of the ecological

Page 7: S.16 Application for on Tam Kon Chau Road in DD101 and 104

S16 Application for Proposed Underground Stormwater Drainage Pipe and

Excavation and Back-filling of Land on Government Land in DD101 and DD104,

Mai Po PlanArch Consultants Ltd.

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value of the area or the development is an essential infrastructural project with

overriding public interest.”

Although the application site falls within the WCA, the implementation of the

stormwater drainage pipe will be located on dry land, which will not lead to

loss of function and area of the wetland.

Page 8: S.16 Application for on Tam Kon Chau Road in DD101 and 104

Legend:

Plan Based on

Mai Po

Outline Zoning Plan

No. S/YL-MP/6

Published on 18.2.2005

Location Plan

S16 Application for

Proposed Underground Stormwater Drainage Pipe

Government Land in D.D. 101 and 104

Mai Po, Yuen Long

Plan 1

PlanArch Consultants Ltd.

Revision: Date: 19.10.2020

CA

Proposed Underground Stormwater Drainage Pipe

User
Typewritten Text
User
Typewritten Text
Page 4 of 16
Page 9: S.16 Application for on Tam Kon Chau Road in DD101 and 104

S16 Application for Proposed Underground Stormwater Drainage Pipe and

Excavation and Back-filling of Land on Government Land in DD101 and DD104,

Mai Po PlanArch Consultants Ltd.

\\PLANARCH\Project\Pjt552\App-16 Page 5 of 16 March 2021

Photo 1: The proposed underground stormwater drainage pipe will connect to the drainage system within the new field studies centre in the GIC site on the concerned OZP.

Photo 2: The proposed underground stormwater drainage pipe will be located on the Government Land at the existing concrete road (Tam Kon Chau Road)

Photo 3: The proposed underground stormwater drainage pipe will be connected to a stream in the Conservation Area.

Field Studies

Centre in the

GIC site

3

2

1

From new field studies

centre to Tam Kong Chau

Road

Page 10: S.16 Application for on Tam Kon Chau Road in DD101 and 104

S16 Application for Proposed Underground Stormwater Drainage Pipe and

Excavation and Back-filling of Land on Government Land in DD101 and DD104,

Mai Po PlanArch Consultants Ltd.

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3 PROPOSED UNDERGROUND STORMWATER DRAINAGE PIPE ON

GOVERNMENT LAND IN D.D. 101 AND D.D. 104 FOR THE FIELD

STUDIES CENTRE

3.1 Background

The new field studies centre located at the end of Tam Kon Chau Road near

the Hong Kong Police Force Pak Hok Chau Operational Base, Yuen Long. It

falls within “G/IC” zone on the concerned OZP. The site has been in

operation as a field studies centre since the 1980s and many facilities are

unable meet modern standard and present community needs.

The proposed underground stormwater drainage pipe is an essential

infrastructure to support the upgrading. Since the length of the total alignment

is about 142m, and the width of excavation for laying the pipes and necessary

buffer area is about 1.15m, the application site area is about 163.3sq.m.

The existing stormwater drainage system at the field studies centre has an

outfall to discharge surface run-off to a nearby fish pond and it was approved

by Buildings Department (BD) in 1989. However, since the fish pond is

under private ownership, Drainage Services Department (DSD) suggested the

applicant to design a more reliable and permanent proposal for proper drainage

discharge since the status of the nearby fish pond may change over time.

After discussing with DSD on several alignments for stormwater drainage pipe,

it was accepted at the discharge to a nearby stream which is in Government

Land. With stormwater drainage pipe underneath Government Land, it will

ensure proper discharge permanently.

A Drainage Impact Assessment Report prepared to facilitate the General

Building Plans submission for the field studies centre was submitted to DSD

previously, and DSD has no comment (please refer to Appendix 1 for this

Drainage Impact Assessment Report).

3.2 Development Proposal

The proposed underground stormwater drainage pipe will connect the new

surface run-off drainage system within the field studies centre in the GIC site

to a nearby natural stream agreed by DSD to provide reliable and permanent

outfall for the surface run-off discharge from the site. Such drainage

arrangement will ensure no adverse drainage impact causing to the

surrounding areas. The alignment and the related works area of the

underground stormwater drainage pipe is shown is Plan 2 (Application Site).

The diameter of the proposed underground stormwater drainage pipe will be

450mm (0.45m) and the proposed alignment is about 142m. The application

Page 11: S.16 Application for on Tam Kon Chau Road in DD101 and 104

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Excavation and Back-filling of Land on Government Land in DD101 and DD104,

Mai Po PlanArch Consultants Ltd.

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site area is about 163.3sq.m. The excavation area will be 1.15m wide and

128m long, with excavation of about 1 to 2.1m deep. Upon the installation of

the proposed facilities, the underground stormwater pipe will be covered with

the original material type.

During construction phase of the proposed use, relevant mitigation measures

will be carried out to ensure no adverse impact will be caused to the

surrounding environment.

Please refer to Plan 2 for the proposed site location of the underground

stormwater drainage pipe, and Plan 3a for the DSD’s specification drawing

(drawing no. DS 1049B) for reference on the design of the proposed

underground stormwater drainage pipe and Plan 3b for the drawing showing

the indicative design of the new outfall for stormwater discharge.

Table 3.1: Development Parameters of the Proposed Underground Stormwater

Drainage Pipe

Current Application

Proposed Application Site Area : Works Area : about 163.3 sq.m.

Dimension of Proposed

Underground Stormwater

Drainage Pipe

: Diameter: 450mm (0.45m)

Length: about 142m

(128m in “CA” zone and 14m in “G/IC” zone)

Excavation Area (for “CA” zone

only)

: About 147.2sq.m.

Width of excavation : About 1.15m

Length of excavation : About 128m

Depth of Excavation : About 1 to 2.1m

3.3 Proposed Construction & Mitigation Measures

Comprehensive mitigation measures are proposed from design and

construction aspects. For instance, the works area of the proposed use is

based on the DSD’s technical specifications and the extent of excavation has

been set to be minimal. Since the excavation will take place along a paved

area, there will be no impact on vegetation and floral species. To minimize

the impact to the ecology and the environment, the construction of the

stormwater drainage pipeline will follow stringent protocols and mitigations.

All construction will be completed within 6 weeks, and most excavation done

in about 2 weeks.

To ensure that there will be no adverse impacts to the wild life, their habitats

as well as the residents in the surrounding areas, careful considerations have

been given when devising the design, scale and extent of work involved to

ensure that the proposed works is minimal and it will be compatible with the

surrounding environment.

Page 12: S.16 Application for on Tam Kon Chau Road in DD101 and 104

S16 Application for Proposed Underground Stormwater Drainage Pipe and

Excavation and Back-filling of Land on Government Land in DD101 and DD104,

Mai Po PlanArch Consultants Ltd.

\\PLANARCH\Project\Pjt552\App-16 Page 8 of 16 March 2021

All relevant statutory requirements for the construction and implementation of

the proposed underground stormwater drainage pipe will be complied with.

The construction works for the proposed use will be carried out on a concrete

paved road and the extent of works area and excavation will be kept minimal.

The works area will remain in the concrete paved and verge areas and would

not affect the bund areas. Hence, neither wetland habit area nor function of

the wetlands in this part of the WCA will be adversely affected by the

proposed use.

Good site practice will be implemented during construction. During the

operational phase, with the provision of new drainage facilities in the field

studies centre in the GIC site (e.g., sand trap and catch pit etc.), waste, such as

fallen leaves and soil etc., collected in the U-channels within the field studies

centre will be filtered out before directing into the underground pipes.

Since the proposed stormwater pipe will be installed underground that it will

not cause adverse impact to visual quality.

Hence, it is anticipated that neither wetland habitat area nor function of the

wetlands in the Wetland Conservation Area will be adversely affected by the

proposed use.

Page 13: S.16 Application for on Tam Kon Chau Road in DD101 and 104

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User
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Plan 2 Page 9 of 16
Page 14: S.16 Application for on Tam Kon Chau Road in DD101 and 104
User
Typewritten Text
Plan 3a Page 10 of 16
Page 15: S.16 Application for on Tam Kon Chau Road in DD101 and 104

Outfall Details

User
Typewritten Text
Plan 3b Page 11 of 16
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Excavation and Back-filling of Land on Government Land in DD101 and DD104,

Mai Po PlanArch Consultants Ltd.

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4 Technical Justifications

4.1 Drainage System

Drainage Impact Assessment (DIA) and review on potential drainage impact

due to the upgrading of the new field studies centre in the GIC site was carried

out, and proposed underground stormwater drainage pipe is a proper and

permanent arrangement which can ensure no adverse drainage impact to the

surrounding areas (please refer to Appendix 1 for the DIA report). The same

report was submitted to DSD and BD for their comment. Both departments

have no comment on the proposal.

According to the DIA report, the proposed underground stormwater pipeline

can divert all stormwater intercepted via the new drainage facilities within the

field studies centre to the designated outfall to a nearby natural stream.

Proper maintenance of the proposed underground pipes will be undertaken by

the applicant to ensure no adverse drainage impact will be caused to the

surrounding areas.

Please refer to Appendix 1 for the Drainage Impact Assessment (DIA) report.

4.2 Ecological Impact

To ensure that there will be no adverse impacts to the wild life, their habitats

as well as the residents in the surrounding areas, careful considerations have

been given when devising the design, scale and extent of work involved to

ensure that the proposed works will be compatible with the surrounding

environment.

All relevant statutory requirements for the construction and implementation of

the proposed underground stormwater drainage pipe will be complied with.

Since the construction works for the proposed use will be carried out on a

concrete paved road and the extent of works area and excavation has been

minimized, it is anticipated that neither wetland habitat area nor function of the

wetlands in this part of the Wetland Conservation Area will be adversely

affected by the proposed use.

Please refer to Appendix 2 for the Ecological Impact Assessment report.

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Excavation and Back-filling of Land on Government Land in DD101 and DD104,

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5 Planning Justifications

5.1 Proposed Underground Stormwater Drainage Pipe with excavation and

backfilling of land is essential to the upgrading of the field studies centre

in the GIC site and WWF-HK’s public education programme

WWF-HK has been operating education programme for students and the

general public for 40 years. The proposed underground stormwater drainage

pipe is essential to facilitate the upgrade of the new field studies centre in the

GIC site. It provides reliable and permanent drainage arrangement to

discharge the surface run-off intercepted via the new drainage system within

the field studies centre in support of the new public education programme.

In other words, the proposed underground stormwater drainage pipe will

contribute to comprehensive upgrade of the new field studies centre for better

opportunities to students and the general public from different backgrounds

and sectors of the society to experience the wetlands, to appreciate water birds

and other wildlife.

5.2 Nature of Use and Scale of the Proposed Underground Stormwater

Drainage Pipe are in line with the planning intention of “CA” and “G/IC”

zones

WWF-HK has been conserving with the AFCD to actively conserve the

wetlands and its biodiversity and with Education bureau to develop and run

education programme for students for over 30 years, and the new field studies

centre in the GIC site is an integral component of its education programme.

Monitoring and research are also conducted in the reserve by various

institutions and experts. WWF-HK also uses the field studies centre as a base

to run wetland management training to build up the capacity of reserve

managers in the region, as well as for citizen science-based experience and

projects with youth and other community and volunteer groups. WWF-HK

provides community appreciation /awareness of nature and biodiversity with

nature interpreted guided visits.

The proposed underground stormwater drainage pipe is in-line with the

planning intention of “CA” zone since the proposed use “is an essential

infrastructure project with overriding public interest.” It will support the

field studies centre, which is a GIC facility serving the need of the visitors

through the education programme of the MPNR, which meets the planning

intention of “G/IC” zone.

Besides, the nature of use, design, scale and extent of the proposed

underground stormwater drainage pipe has been carefully considered in order

to minimize any potential impact to the surrounding environment and the flora

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and fauna. Liaison with Drainage Services Department (DSD) has also been

carried out in 2020, and the current proposal is in line with DSD’s suggestion

to facilitate proper and permanent arrangement to discharge of the surface

run-off from the field studies centre.

5.3 No Adverse Environmental Impact

TPB PG-No.12C requires no-net-loss of wetland resulted from any

developments that fall within the boundary of Wetland Conservation Area

(WCA). Since the construction works of the proposed underground

stormwater drainage pipe will only be carried out along an existing pave

concrete road on Tam Kon Chau Road in D.D. 101 and D.D 104 in Mai Po,

and the extent of the works area will be kept minimal, no-net-loss of wetland is

anticipated as the proposed use will not be affecting the bunds and wetland in

the Wetland Conservation Area, and neither area nor function of the wetlands

within MPNR will be adversely affected.

The proposed underground stormwater drainage pipe will be connected to the

new surface run-off drainage system within the field studies centre in GIC site,

and will provide reliable and permanent outfall for the surface run-off

discharge from the PSFSC. Such drainage arrangement will ensure no

adverse drainage impact causing to the surrounding areas.

During construction phase of the proposed use, relevant statutory requirements

will be followed and mitigation measures will be carried out to ensure no

adverse impact will cause to the surrounding environment.

Good site practice will be implemented during construction. Contractors will

be responsible for the design, construction, operation and maintenance of

applicable mitigation measures specified in ProPECC PN 1/94 for construction

site drainage during construction. During the operational phase, with the

provision of new drainage facilities in the field studies centre in the GIC site

(e.g., sand trap and catch pit etc.), waste, such as fallen leaves and soil,

collected in the U-channels will be filtered out before directing into the

underground pipes.

5.4 Reliable and Permanent Stormwater Discharge to Ensure No Adverse

Drainage Impact to the Surrounding Areas

Drainage Impact Assessment (DIA) and review on potential drainage impact

due to the upgrading of the new field studies centre in the GIC site was carried

out, and proposed underground stormwater drainage pipe is a reliable and

permanent arrangement which can ensure no adverse drainage impact to the

surrounding areas.

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According to the DIA report, the proposed underground stormwater pipeline

can divert all stormwater intercepted via the new drainage facilities within the

field studies centre in GIC site to the designated outfall to a nearby natural

stream. Proper maintenance of the proposed underground pipes will be

undertaken by the applicant to ensure no adverse drainage impact will be

caused to the surrounding areas.

Please refer to Appendix 1 for the Drainage Impact Assessment (DIA) report.

5.5 No Adverse Ecological Impact

To ensure that there will be no adverse impacts to the wild life, their habitats

as well as the residents in the surrounding areas, careful considerations have

been given when devising the design, scale and extent of work involved to

ensure that the proposed works will be compatible with the surrounding

environment.

All relevant statutory requirements for the construction and implementation of

the proposed underground stormwater drainage pipe will be complied with.

Since the construction works for the proposed use will be carried out on a

concrete paved road and the extent of works area and excavation has been

minimized, it is anticipated that neither wetland habitat area nor function of the

wetlands in this part of the Wetland Conservation Area will be adversely

affected by the proposed use.

5.6 The approval of the application will not set an undesirable precedent

The proposed underground stormwater drainage pipe is a well-thought out

proposal in terms of the design, scale and extent of work, as well as the

construction method, have been carefully considered to ensure that no adverse

impact will be caused to the Wetland Conservation Area and its biodiversity.

The works area of the proposed use is based on the DSD’s technical

specifications and the extent of excavation will be minimal. The proposed

underground stormwater pipe will be installed underground that it will not

cause adverse impact to visual quality.

Besides, the proposed infrastructure upgrading works are in line with the

planning intention of “CA” zone and “G/IC” zone.

The proposed use will support WWF-HK’s public education and conservation

programme at the field studies centre. It will provide more opportunities for

the general public to learn about wetland conservation and sustainable

development. Therefore, the approval of this application will support

WWF-HK’s on-going effort in wetland conservation and public education, and

it will not set an undesirable precedent.

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6 Conclusion

The proposed underground stormwater drainage pipe is essential to the

upgrading of the new field studies centre in the GIC site and the on-going

development of WWF-Hong Kong’s education programme. It will provide

proper and permanent drainage connection to discharge the surface run-off

intercepted in the field studies centre.

The proposed underground stormwater drainage pipe is a well-thought out

proposal in terms of the design, scale and extent of work, as well as the

construction method, have been carefully considered to ensure that no adverse

impact will be caused to the Wetland Conservation Area and its biodiversity.

The works area of the proposed use is based on the DSD’s technical

specifications and the extent of excavation will be minimal. The proposed

underground stormwater pipe will be installed underground that it will not

cause adverse impact to visual quality. Location, construction methods and

approaches for the upgrading proposals have been carefully considered to

prevent/minimize any potential impacts to wildlife and the surrounding

environment. Hence, no adverse impact on visual, drainage, environment

and ecology is envisaged.

Therefore, in support of the effort to upgrade the essential infrastructure of the

field studies centre and thereby enabling WWF-HK’s mission and commitment

to provide professional wetland management training, deliver education

programmes that empowers students and the general public to recognize the

value of nature, getting insights on how people and nature can thrive and the

urgency needed to restore biodiversity, members of the Town Planning Board

are respectfully requested to give favorable consideration to the application.