Rainwater Harvesting(Elya2 1)

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Regional Conference for Southeast Asia on Rainwater Harvesting in IWRM: An ExChange of Policies and Learnings

November 25-26, 2008
Davao City

Published in: Technology, Business
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Rainwater Harvesting(Elya2 1)

  1. 1. RAINWATER UTILISATION: SHARING NAHRIM EXPERIENCE IN RAINWATER SYSTEM RESEARCH NATIONAL HYDRAULIC RESEARCH INSTITUTE OF MALAYSIA (NAHRIM)
  2. 2. <ul><li>Annual Rainwater ≈ 990 billion m3 </li></ul><ul><li>(Area = 330,000km2 with Average Annual Rainfall = 3,000mm) </li></ul><ul><li>566 billion m3 becomes surface runoff </li></ul><ul><li>360 billion m3 evaporated </li></ul><ul><li>64 billion m3 discharges as groundwater </li></ul><ul><li>Water Consumption ≈ 12.5 billion m3 (year 2000) </li></ul><ul><li>BUT…..we still have water supply disruptions?! </li></ul><ul><li>(1998 drought brought unpleasant water supply disruptions to the 1.8 million </li></ul><ul><li>residents of Klang Valley) </li></ul>
  3. 3. <ul><li>Long ago, has been practiced in Malaysia especially in the villages. </li></ul><ul><li>Housing and Local Government expressed to use RWHS on 7 May 1998 due to drought season (April 1998). </li></ul><ul><li>Main aim: to encourage Malaysia to think and adopt wherever possible appropriate innovative alternatives which offer real advantages and adaptable to their needs. </li></ul><ul><li>To support: NAHRIM, DID, DLG & higher learning institutions collaborate to pursue R&D on RWHS. </li></ul>HISTORY OF RWHS APPLICATION IN MALAYSIA
  4. 4. RAINWATER HARVESTING SYSTEM CHRONOLOGY To support: NAHRIM, DID, DLG & higher learning institutions collaborate to pursue R&D on RWHS. Date Chronolgy April, 1998 Water Shortage Crisis in Klang Valley during drought season 7 May , 1998 Government announced interest on RWHS 23 Jun 1999 Initial guideline produce by Housing and Local Governemnt “Installing a Rainwater Collection and Utilisation System”. October, 2004 Cabinet paper released to encourage government and federal buildings need to install RWHS but it is still not a mandatory August 2006 Town of Country Planning & Development had produced a National Urbanization Policy (NUP) stress the need to improve water management efficiency by emphasizing the use of RWHS March 27, 2006 Mandatory by government to large buildings like factory, schools or bungalows to install RWHS
  5. 5. Water Demand and Projected Water Supply for Selangor and Klang Valley SisTAH REDUCES THE NETT TREATED WATER DEMAND Sg Selangor Dam Klau Dam Interstate Water Transfer Telemong Dam and Bentong Weir Liang Dam Lipis Dam WATER DEMAND Delayed Dam Construction
  6. 6. The system consist: 1 2 3 5 4 7 6 CATCHMENT AREA
  7. 7. IMPLEMENTED RAINWATER HARVESTING PROJECT DID HQ @ Jalan Sultan Salahuddin, K. Lumpur UTHM Hostel
  8. 8. DID Dungun @ Terengganu Bangalow House Mosque Complex
  9. 9. NAHRIM CURRENT RWHS PROJECTS RWHS @ NATIONAL ZOO RWHS @ LONG HOUSE
  10. 10. RWHS AT NATIONAL ZOO
  11. 11. Objective installing RWHS at National Zoo <ul><li>To create some creative and interesting design </li></ul><ul><li>To proof to Malaysian RWHS has been implemented </li></ul><ul><li>To encourage people to use RWHS </li></ul><ul><li>To educate younger generation on RWHS </li></ul><ul><li>To provide a supplementary water supply </li></ul><ul><li>Reduce water bill </li></ul>
  12. 14. RWHS AT LONG HOUSE <ul><li>Source </li></ul><ul><ul><li>From impounded river source located 3.4 km </li></ul></ul><ul><ul><li>from long house. </li></ul></ul><ul><li>During Wet season </li></ul><ul><ul><li>Sufficient volume and water pressure. </li></ul></ul><ul><li>During Dry season </li></ul><ul><ul><li>No supply form impounded source. Resident has to carry water from stream at foot hill. </li></ul></ul>
  13. 15. Existing Sanitation System <ul><li>Discharge </li></ul><ul><ul><li>Direct discharge into cesspool and stream. </li></ul></ul><ul><ul><li>No treatment </li></ul></ul>
  14. 16. 5 No HDPE 10,000 gallon Storage Tank 200mm wide gutter Catchments for Rainwater Down Pipe 5 No HDPE 1000gallonStorage Tank
  15. 17. RWHS designed by villager….
  16. 18. Software: Tangki NAHRIM
  17. 19. Software: Tangki NAHRIM
  18. 20. CONCLUSION <ul><li>- The practice of using RWHS should be promoted widely to the masses; </li></ul><ul><li>The government agencies should lead by example and start installing systems at their own premises; </li></ul><ul><li>Agencies of technical and research capabilities need to collaborate to come out with ideas to develop an effective system, suitable to people condition and well accepted by all.. </li></ul>
  19. 21. Thank You..

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