dma set up - jalur cahaya sdn bhd
TRANSCRIPT
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8/8/2019 DMA Set Up - Jalur Cahaya Sdn Bhd
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Malaysia Issues onNRW
DMA Set-Up
Speaker- Dato Abdul Jalil Abdul Karim
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WH AT IS A DMA?
A District Metered Area (DMA)is a small area of distribution system whichis specifically defined
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To monitor the performance of the area byvarious indicators: W ater balance, NR W% , NR W volume Level of leakage
For Active Leakage Control activities Critical areas can be prioritized the for leak
detection
For Pressure management (where possible) Eliminating excess pressure Reducing leakage volume
WHY DO W E NEED TO H AVE DMAs?
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Selection criteria 500 to 2000 connections 5km to 20 km Sufficient pressure Ability to hydraulically isolate area
GIS roles in pre-selection of area
Zero pressure testPermanent meter & data logger installationData storage & analysis
A DMA SET-UP
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GIS roles in pre-selection of area
GPS Ground Level Survey must be carried out for each feature (hydrant,air valve, pipeline etc) to have a view of terrain on the potential area of
DMA establishment. This information is critical for pressure managementundertaking in the near future.
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GIS roles in pre-selection of area
The correct pipeline registration will help define the natural boundary existedby the current supply system- suitable DMA can be planned from this
information. Pipe registration can also be used to identify the measurementof pipeline within the zone as required in the selection criteria.
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A typical inlet point to a DMA
Logger abinetLogger abinet trainer
Meter
trainer
Meter
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Data Center- H ome of DMAs Data
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Netbase W ater Management Software
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Daily DMA Monitoring using Netbase
Leakage Leakage
Repair Repair Repair Repair Repair
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After a
proper DMA Set-Up
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PENISULAR MALAYSIA
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SELANGOR
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GOMBAK DISTRICT ( Total No of Connections: )
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GB100,Kg Dato Keramat (No Of Connections : 1510)
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Info of DMA - GB100
Date Established : 30 Sep 2008Mainslength of pipe :12.84 kmNo. of connections : 1510
Pipe materials : AC ( 100
200 dia )
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PMI GB100
Permanent Meter Installation (PMI) T he purpose of PMI isto measure incoming flow into the DMA
Level : 36.197 mCoordinate : 1014405.31"E 30954.51"N
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PRV GB100
Pressure Reducing Valve (PRV) T he purpose of PRV is toreduce & control the incoming pressure into DMA
Level : 38.255 mCoordinate : 1014405.31"E 30955.28"N
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AZP GB100
Average Zone Pressure (AZP) T o measure averagepressure inside DMA
Level : 32.186 m
Coordinate : 10143'25.64"E 30957.18"N
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TP GB100
T arget point ( T P) - T he critical (minimum) pressure insideDMA
Level : 32.933 mCoordinate : 1014316.63"E 309'59.23"N
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BV 1
BoundaryValve (BV)
DMA GB.100
Outside DMA
Border Of DMA GB.100
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BV 2
BoundaryValve (BV)
DMA GB.100
Outside DMA/
District Kuala Lumpur
Border Of DMA GB.100
Border Of District
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Boundary Valve (BV)
Boundary Valve
Valve permanently closed to maintainintegrity of DMA
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Technological advancement & competition has givenmore equipment choices at lower cost- Battery operated Electromagnetic Flowmeter - GSM/ GPRS Data Logger
- Longer Battery Life
W ide GSM/ GPRS Coverage at low cost for DataPackage (only RM8/ month)
Permanent & Continuous monitoring with GSM DataLogger is cheaper than manual data download in thelong term (savings in manhour and logistic cost)
Current Practices & Technology
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Poor mappingDMA breached ( opening of by-pass & BV )Limitation of pressure management
isolated houses & elevationConnectivity issue lack of informationConflict between Operations Dept & NR W units
Supply system changes & road wideningworksShortage of skilled staff
Problem Encountered
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Th ank you!