Rainwater Harvesting(Elya2 1)

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Information about Rainwater Harvesting(Elya2 1)

Published on November 27, 2008

Author: vicmanlapaz

Source: slideshare.net

Description

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

November 25-26, 2008
Davao City

RAINWATER UTILISATION: SHARING NAHRIM EXPERIENCE IN RAINWATER SYSTEM RESEARCH NATIONAL HYDRAULIC RESEARCH INSTITUTE OF MALAYSIA (NAHRIM)

Annual Rainwater ≈ 990 billion m3 (Area = 330,000km2 with Average Annual Rainfall = 3,000mm) 566 billion m3 becomes surface runoff 360 billion m3 evaporated 64 billion m3 discharges as groundwater Water Consumption ≈ 12.5 billion m3 (year 2000) BUT…..we still have water supply disruptions?! (1998 drought brought unpleasant water supply disruptions to the 1.8 million residents of Klang Valley)

Annual Rainwater ≈ 990 billion m3

(Area = 330,000km2 with Average Annual Rainfall = 3,000mm)

566 billion m3 becomes surface runoff

360 billion m3 evaporated

64 billion m3 discharges as groundwater

Water Consumption ≈ 12.5 billion m3 (year 2000)

BUT…..we still have water supply disruptions?!

(1998 drought brought unpleasant water supply disruptions to the 1.8 million

residents of Klang Valley)

Long ago, has been practiced in Malaysia especially in the villages. Housing and Local Government expressed to use RWHS on 7 May 1998 due to drought season (April 1998). Main aim: to encourage Malaysia to think and adopt wherever possible appropriate innovative alternatives which offer real advantages and adaptable to their needs. To support: NAHRIM, DID, DLG & higher learning institutions collaborate to pursue R&D on RWHS. HISTORY OF RWHS APPLICATION IN MALAYSIA

Long ago, has been practiced in Malaysia especially in the villages.

Housing and Local Government expressed to use RWHS on 7 May 1998 due to drought season (April 1998).

Main aim: to encourage Malaysia to think and adopt wherever possible appropriate innovative alternatives which offer real advantages and adaptable to their needs.

To support: NAHRIM, DID, DLG & higher learning institutions collaborate to pursue R&D on RWHS.

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

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

The system consist: 1 2 3 5 4 7 6 CATCHMENT AREA

IMPLEMENTED RAINWATER HARVESTING PROJECT DID HQ @ Jalan Sultan Salahuddin, K. Lumpur UTHM Hostel

DID Dungun @ Terengganu Bangalow House Mosque Complex

NAHRIM CURRENT RWHS PROJECTS RWHS @ NATIONAL ZOO RWHS @ LONG HOUSE

RWHS AT NATIONAL ZOO

Objective installing RWHS at National Zoo To create some creative and interesting design To proof to Malaysian RWHS has been implemented To encourage people to use RWHS To educate younger generation on RWHS To provide a supplementary water supply Reduce water bill

To create some creative and interesting design

To proof to Malaysian RWHS has been implemented

To encourage people to use RWHS

To educate younger generation on RWHS

To provide a supplementary water supply

Reduce water bill

 

 

RWHS AT LONG HOUSE Source From impounded river source located 3.4 km from long house. During Wet season Sufficient volume and water pressure. During Dry season No supply form impounded source. Resident has to carry water from stream at foot hill.

Source

From impounded river source located 3.4 km

from long house.

During Wet season

Sufficient volume and water pressure.

During Dry season

No supply form impounded source. Resident has to carry water from stream at foot hill.

Existing Sanitation System Discharge Direct discharge into cesspool and stream. No treatment

Discharge

Direct discharge into cesspool and stream.

No treatment

5 No HDPE 10,000 gallon Storage Tank 200mm wide gutter Catchments for Rainwater Down Pipe 5 No HDPE 1000gallonStorage Tank

RWHS designed by villager….

Software: Tangki NAHRIM

Software: Tangki NAHRIM

CONCLUSION - The practice of using RWHS should be promoted widely to the masses; The government agencies should lead by example and start installing systems at their own premises; 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..

- The practice of using RWHS should be promoted widely to the masses;

The government agencies should lead by example and start installing systems at their own premises;

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..

Thank You..

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