UTILITIES - WATER SUPPLY AND DRAINAGE SERVICES CONSIDERATION FOR URBAN PLANNING (c) wellington regional council / http://wellington.govt.nz/services/consents-and-licences/earthworks-consents (c) planning dept. for the government of Hong Kong / http://www.pland.gov.hk/pland_en/tech_doc/hkpsg/full/ch7/ch7_text.htm

1. WATER SUPPLY SERVICES
CONSIDERATIONS IN URBAN PLANNING

2. Service reservoirs (fresh water/salt
water/artificial) should be located as
near as possible to the area they served
and, wherever possible, sited at a level
where water can be fed by gravity to
the community.

3. Water Service Reservoir for Urban Areas
Water Service Reservoir for Rural Areas

4. The design of the reservoirs (if there is
one in the site area) should reduce
adverse visual, landscape and ecological
impacts. Landscape treatments should
be incorporated in the design as well.

5. Black & Veatch design wins award for protecting environment at the University of Hong
Kong; Innovative cavern reservoir design helps preserve listed buildings, hillside, trees,
saves space and money, and reduces waste

6.  They should normally be located within reasonable
proximity to the source of supply to ensure a positive suction
head is available.
 Sites for pumping stations should have adequate vehicular
access to facilitate maintenance and transportation of
materials and dangerous goods (disinfectant substances,
etc.).
 Pumping stations and Water Treatment Facilities should be
located away from residential or other sensitive uses,
wherever possible, to minimize noise problems.

7.  Salt water pumping stations (if site area is a coastal/ near
coast area) should be located as near as possible to seafront
with access to a source of clean sea water. A minimum clear
distance of 100m is normally required.
 Water pipelines are normally placed underground and routed
along roads and road sides.
 If possible, we should provide adequate distance of water
pipelines from power cables, gas pipelines, sewer lines and
other services.

8.  Do not lay water pipelines near the crest of a slope because of
the instability of slope which can cause leakage to pipelines.
In cases where the proposed development cannot be modified to
permit the siting of water mains outside this crest area, the ff.
actions should be taken:
 The slope should be designed to the appropriate factors of
safety, taking into account the effects of possible water
leakage.
 As an alternative, water mains can be housed within a sealed
trench, ducting system or sleeve drained to a suitable
discharge point at a surface drain or natural stream.

9. DRAINANGE
SERVICES
CONSIDERATIONS IN URBAN PLANNING

10. Sewage should be
collected and conveyed in
enclosed conduits which
should normally be placed
underground.

11. Sewers could be located
under the carriageways,
footpaths, cycle tracks
or amenity strips. If this
is not feasible, separate
drainage reserves should
be provided.

12. Storm water may be collected and conveyed either in enclosed
drains or open channels.

13. When choosing the alignment of drainage channels, account
should be taken to minimize disruption to adjacent communities
and minimize land resumption/reopening.

14. Landscaping should be considered and incorporated in the design of
Storm water drainage system to blend in with the environment.

15. Supporting drainage
facilities such as
channel
embankments may
be permitted to be
used as amenities or
recreational areas
and access roads as
waterfront
promenades

16. Polder Drainage and Floodwater Pumping
Schemes are necessary to render flood protection
to villages in low-lying areas.

17. The Storm Water Drainage System Plan and Design must
include the construction of floodwater pumping station,
floodwater storage pond, and flood protective bund or
wall around the villages and floodwater storage pond.

18. Flood Protection

19. Flood Water Pumping Facility

20. Floodwater storage ponds should be located at the lowest
areas of the site. They should either be covered or
properly fenced off for safety reasons. Under no
circumstances should public access routes be allowed
through the areas of the floodwater storage ponds.