8
Infrastructure
31
8.1 Introduction
A comprehensive engineering analysis and pre- liminary design has been carried out for the proposed development. Basic services, including roads, water supply, sewerage and electricity/ telephone, as well as surface storm drainage systems, have been quantified and located on plan. Terrain analysis studies have analysed existing geological and soils conditions leading to specific recommendations regarding fill pro- cedures and foundations design.
8.2 Terrain Analysis: Landform
Development planning in San Tin has been structured to avoid building areas in low alluvial terrain as much as possible. Of the roughly 3 million cubic metres of fill material needed, about 2/3 is used in the construction of town park, open space, and associated recreation areas. These requirements can be met largely through fish pond and lake area excavations, since they are non-structure supporting.
Remaining fill material can be acquired through adjacent site borrow within the project boundary or through imported materials from the immediate region or beyond. (See Volume 2, Appendix Section 3 for details.)
8.3 Surface Water Drainage
Comprehensive water retention amenity ponds have been designed through primary open space systems. These culminate in a large northern lake in the town park. Fixed level weirs coupled with a backup recirculation system integrated into open space irrigation outlets -- will maintain water levels.
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Agriculture areas will include irrigation ponds and a separate drainage system flowing past the town park into the Shum Chun River.
including existing from flooding in a
The whole of the proposed system is designed to protect all development floodprone village areas 200 year storm.
-
P19
36 42693
A12
2635
P8
2161
A2
$4
A14
334
<15
191
10D
D11
3841
P7
107
A 210
P18
<41010
35A
800
3330
P6
IC1
1204
800
P17
I A1
(800)
8
2530
IB
109
P5
SA
1014
IB1
P2
465)
A4
549
Pt
P4