APPLYING GIS FUNCTIONSIN

NRW REDUCTION ACTIVITIES

Ir. Zainuddin Bin Md GhazaliChief Operating OfficerRanhill Water Services Sdn Bhd83, Matang Building, Jalan Langkasuka,80350 Johor Bahru, Malaysia.Tel: 607 276 2020HP: 6019 772 6611email : zainuddin@rws.com.myWebsite: www.rws.com.my

What is NRW?

Non Revenue Water definition is quantity of water produced from treatment plant not billed to

customer

 NRW = System Input – Water billed

The formula

if P = System Input , C = Billed Consumption

P - C =

NRW %P

P C

RESERVOIR CUSTOMER METERPRODUCTION METER

* A measuring scale for Water Supply company efficiency

Infrastructure Leakage Index (ILI)

• Calculation for ILI is;

CARL (Current Amount Real Loses)

UARL (Un-Avoidable Real Loses)

CARL = physical loses includes overflow, burst, and leaks

UARL = (18 x Lm + 0.8 Nc + 25 Lp) Pr

Pr = Pressure. Avg retic and distr mains = 3.2 Bar.

Lm = Pipe length from GIS in meter.

Nc = Number of Billings connections.

Lp = Private length, or avg communication pipe in meter.

PHYSICAL LOSSES TARGET MATRIX

Physical Loss Performance: Categories; Guide to Further Action

A B C D

Good: further loss reduction may be uneconomic; careful analysis cost effective improvements.

Potential for marked improvements: Consider pressure management, better active leakage practices and better maintenance.

Poor: Tolerable only if water is plentiful and cheap; even then intensify NRW reduction efforts.

Terrible: Inefficient use of resources; NRW reduction programs imperative and priority.

Why NRW is very important to any water operator?

To fully optimize usage of treated water produced by consumers

To optimize revenue

Increase operational efficiency

Where do GIS functions benefit NRW Management?

In areas of: Water Asset Registration DMA establishment Network Modeling Planning & Operation

Where do GIS functions benefit NRW Management?

Water Asset Registration

Asset Registration : eliminate OUTDATED AND UNMAINTAINED DATA

Created once in Excel and no update after thatTACIT

JOHOR DIGITAL MAP & JOHOR DIGITAL MAP & PIPELINESPIPELINES

ASSET MEASUREMENT ASSET MEASUREMENT

Source : SAJH-GIS (Apr 2013)

Measurement Unit Year 2006 Year 2010 % increase

Pipe Length Km 15,114.20 19,191.12 27%

Valve Unit 39,519 54,207 37%

Hydrant Unit 24,033 36,117 50%

Air Valve Unit 8,393 12,537 49%

Double Air Valve Unit 4,848 13,953 188%

Water Sampling Point Unit 861 933 8%

End Cap Unit 4,623 6,514 41%

Customer supply point Unit 46,164 501,103 985%

Asset update progress over five (5) years

* Source of data courtesy of SAJ Holdings Sdn Bhd

GIS for Asset Registration

Single point of reporting for water assets

Avoid outdated and unmaintained data

Where do GIS functions benefit NRW reduction?

DMA Establishment

DMZ – BW16DMZ – BW16

GIS for DMA establishment

Network Tracing to locate valves to be boundary valves for DMA

DMZ polygon

GIS for DMA establishment

Improved DMA boundaries and data value

* Source of data courtesy of SAJ Holdings Sdn Bhd

Conflict output

DMZ Conflict Inspector (DMZ-CI)

Result – better analysis for NRW by DMA (case on zero variance in number of connections

* Source of data courtesy of SAJ Holdings Sdn Bhd

Result – better analysis for NRW by DMA on commercial losses

* Source of data courtesy of SAJ Holdings Sdn Bhd

GIS for DMA establishment

To provide scale-down NRW analysis by DMA

Improve DMA boundary and data value Better analysis on commercial losses Leakage percentage and pressure

management

Where do GIS functions benefit NRW reduction?

Network Modeling

Hydraulic Modeling : tedious work in Excel and plotting in hydraulic software

Create in Excel and transfer to Model

Data transfer from GIS to Hydraulic Modeling Software

Laid on Google map

Result: Analysis on DMA pressure survey (High Pressure)

GIS for Network Modeling

Avoid redrawing of data Data transfer from GIS to Modeling

software Model can be shown as layer-lapping

with GIS map/Google map

Where do GIS functions benefit NRW reduction?

Planning & Operation

Burst locationBurst location

Burst Burst TotalTotal

GIS for Planning of Asset Replacement

Pipe burst record in GIS

GPS to locate burst location and record in GIS

GIS for Planning of Asset Replacement

Record of Asset Burst records

- for pipe replacement program

Planned Shut Down & Trace to Affected Customers Application

Record of customer affected by water disruption from billing system

GIS for DMA Maintenance

Opening/closing of valve: better management on service interruption during DMZ maintenance

- ZPT

- Step test

Challenges & lessons learned

Be achieved with: High commitment from all staffs in the company

– from top to bottom Collaboration & Co-operations Willing to improve

Rapid development environments, ease of use, product reliability, and vendor stability are among key contributors to selecting integrated platform options

Customer service/stakeholders’ interests must be the key indicator – fulfill the needs and efficient service

THANK YOU