Regional Conference for Southeast Asia on Rainwater Harvesting in IWRM: An ExChange of Policies and Learnings November 25-26, 2008 Davao City

1. Managing Stormwater for Water Resource and Flood Control Tan Tien Ser Assistant Director Catchment & Waterways Department Public Utilities Board, Singapore

2. Managing the complete water cycle Rain Sea PUB is responsible for the sourcing, collection, purification and supply of drinking water, the treatment of used water and turning it into NEWater, as well as drainage of stormwater Desal Water NEWater NEWater Indirect Potable Use Direct Non-Potable Use

3. Integrating the Water Loop : Water for All

5. INLAND RESERVOIRS ESTUARINE RESERVOIRS Poyan/Tengeh STORM WATER COLLECTION POND Tampines Pond B MacRitchie

7. Treated Used Water Reverse Osmosis 3. NEWater: Reclaimed Treated Used Water NEWater Microfiltration Ultra-Violet

8. NEWater: Fast Expanding Kranji (9 mgd, Jan 2003) Seletar (5 mgd, 2004) Bedok (7 mgd, Jan 2003) Ulu Pandan (32 mgd, Mar 2007)

11. Flood Prone Areas

13. Past major floods in Singapore Dec 1978 1,000 people affected 7 people died Tide level = 3.2m Total flooded area = 3178 ha Dec 1969 3,000 people affected 5 people died Tide level = 3.2m Total flooded area = 2750 ha Dec 1954 50,000 people affected 5 people died Tide level = 3.2m Total flooded area = 2540 ha 326 467 512 No Record Dec 2006 8 nurseries, 29 families, 1 club house & 4 shophouses Tide level = 3.0m Total flooded area = 12 ha 366 Amount of Rainfall (mm) Year 1931 1940 1950 1960 1970 1980 1990 2000 2006 0 100 200 300 400 500 600

14. 3200 ha in the 1970’s Braddell Road, Dec 1978 Past Floods Newton Circus, Dec 1969 Braddell Road, Dec 1978 Bideford Road, Dec 1969 Flood Photo 1954 Flood Photo 1954 Orchard Road, Dec 1954 Potong Pasir, Dec 1954

15. Recent Floods Beng Wan Road (4 Apr 05) Jurong Port Road (17 Apr 06) Pasir Ris Farmway 2 (16 Oct 05) Veerasamy Road (13 Apr 07) Commonwealth Ave (18 Jan 07) Bedok Ave 3 (14 Apr 06)

17. Canal Outlet drain Closed roadside drain Open roadside drain River Types of drains/canals 820 ha safeguarded for drains and canals (excludes roadside drains within road reserves)

18. flood protection measures… working with developing agencies….. Commonwealth Ave/Queensway Interchange Jurong Island Complex Crest protection for MRT Clarke Quay Station 1.0m Crest Higher platform level for wafer fabrication plants

19. Bukit Timah Phase 2A Flood Alleviation 3 1 2 1 2 3 2 1 3 4 2 1 3 4 Newton Circus , 13 May 1988 Bukit Timah Rd / Evans Rd, 13 May 1988 Thomson Road , 3 Dec 1978

21. Marina Barrage … further reduce flood-prone areas Low-lying areas in Chinatown, Jalan Besar, Rochor will be protected Marina Barrage

22. TNP Big Walk 2008 at Marina Barrage (2 Nov 08)

29. Kolam Ayer ABC Waterfront Before

30. Bedok Reservoir Car park Seating Gallery Floating Gallery - decks and stage

32. Facilities @ Bedok Reservoir

33. Sengkang Floating Island

34. Sengkang Floating Island Artist’s Impressions Today A floating boardwalk camouflaged by plants connects the island and the fruit park A fixed bridge connecting floating island to the Anchorvale CC The floating island helps to filter water while providing an interesting transition from the community club to the fruit park

35. Sengkang Floating Island Artist’s Impression Fruit-themed pavilion creates a thematic link to the fruit park

36. Thank You