Borella Area Bei R a Lake & 8 OICC with Mal I Gakanda 24 Zone CB 2 Offi Ce Ca Mpbel Park Officers OI C 7 Offi Ce - Sl Ave Isl and OI C 4 Office

Annex -3 Training Materials (9)

Presentation Material for Public Seminar Held on 15th October, 2012

2. Pilot Activities in Borella

Present Situation of the Colombo City THE CAPACITY DEVELOPMENT PROJECT FOR NRW REDUCTION IN • Area 37.4 Sqkm N

COLOMBO CITY • No of Connections as at Mattakkul iya A E I & OI C1 - Near Eli e House 2011 128,000 Col o mbo

Port Access Road

SRI LANKA CBI office k m • Administrative by Two OI C 2 Offi ce Kotahena 0 50 100 150 Col o mbo Harbour

OI C 8 Office Manager office , 4 AEE JI CA SLK Offi ce Hul ft sdorf AEII & OI C 3 Mal i gawatta Borella Area Bei r a Lake & 8 OICC with Mal i gakanda 24 Zone CB 2 offi ce Ca mpbel Park Officers OI C 7 Offi ce - Sl ave Isl and OI C 4 Office

Bor el l a Presented by • NRW Percentage 49%

OI C 5 D.H.R. Hettiarachchi Off ice

(Zone officer Borella area) Havel ocktown Savoy Ci nema CB3 office B.Sc. (Phy), NDES(Civil) Pa mankada bri dge IESL(Part2) Wel l a watta km 0 1 2

Work Flow of Activities Purpose of the Project & Project Area Sub① ‐Zone Selection (starts) Mapping section Sub Zone selection Billing section Drawing List of Valve & Fire hydrant Customer details Valve Locating & Not Found Customer Record Sub Zone Isolation Location Survey Excavation Found Found Not found set Meter Installation & Operation • NWSDB Capacity to implement Installation Customer meter

Off Meter Yes list update Initial Inflow Valve Replacement No accuracy test Kotahena Area Feedback Valves & Fire hydrant NRW reduction activity in Yes Consumer Survey Feedback Check the Connection No Isolation Meter ing of un ‐ Meter Accuracy Test meter places Colombo City is Strengthened Flow meter Installation Additional Flow Leak Detection Water Pressure Meter installation No • Borrella Pilot Zone Yes Customer meter NRW (Before) Leak Repair Flow measurement (Before) reading (Before) – Area nearly 4 Sqkm Borella Area Free Water metering Leak detection survey Further reduction of Defective meter Elimination of illegal – Total Connections 5000 replacement connections Evaluation (END) NRW (Step testing) Leak Repair Confirmation survey

Customer meter list – Length of Pipe network - 32 km Leak repair details Observations update StepReduction testing not and enough Pressure – Community consists of Domestic, Achievements Management Flow measurement (After) Cust omer meter NRW (After) Commercial & Tenement Gardens Project outcome reading (behind)

Selected Pilot Zones In Colombo City Area Zone Map‐B1 4

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i Bulk meter c

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c c c c v Inlet 4 (B2)

i 1

v v v

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c 2 ci p

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4 4 4 i 4 c B5 1 4 12 ci Ultra sonic meter

3 1 c 2 i 4 ci ci 4 PVC 4 p Inlet 1 (B4) v c Out let 2 (B 2) Bulk meter with logger 3 pvc Inlet 1 (B6) / Outlet 1 (B5) B3Bulk meter with logger Bulk meter with logger 3 ci

3 pvc i i

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c ci 4

3 ci 2 2 3 3 5 3 3 pvc 4 pvc 6 6 1 3 pvc 1 1 Outlet 1 (B2) 0 3 4 pvc 4 pvc vc 3 3 p p 3 p

p p p Ultra sonic meter v c 1

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3 pvc 90 pvc

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0 0 0

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i 90 50 0 c pv 5

3 Bulk meter with logger c

4 63 c c p c 4 4 4

vc 4 v

v c v

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p p c

c v

c c c

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i 4 i c d 6 p c v 0 0 p 3 3 4 c vc 0 v p p 6 v B10 1 63 p v 0 3 6 1 c 5 p c v Inlet 1 (B1)

i c c c c i v

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i i i c 4 1 4 4 1 3

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p c

3 6 c 3

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4 c 4 c c i

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6 6 6

c 6 4

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i c

p p p p v

c 0 p Bulk meter with logger

v v v v 5

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di c i 4 300 c i ci 4 c c 4 4 B2 c c 0 pv c

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i p

c 9 c i c i

i 3 4 i i c ci c 6 3 3 4 i i c c c i c c 4 4 ci 2

v 2 4 cc i i i p i 1 p

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d c c v

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4 c c c c v

3 c

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p p 0 9

i 5 1 Inlet 3 (B2) 3 3 3 0 4 3

2 3 B1

1 110 pvc i i i

i 6

i c c c i c c

Bulk meter with logger

c 0 0 0 c 0

3 8 ci 4

3 ci 4

ci ci ci

ci c Inlet 2 (B1) 4 4 4 4

4 4 v

4 4 4

4 ci 4

c p

c c c v 4 ci c

i i

i i 3

c p i

i i i 6

i c i c c c

i i Inlet 4 (B2)

4 1 c

c 3 3 3

1 4

4 Ultra sonic meter i Bulk meter with logger

i i

i i c

c c c

c 4 i

4 4 4 4 4 4 c 4 i i 3 c pv 3 1 c p 3 ci vc 1 i

4 0 c

p c ci v vvc c

4 c i

v c p

p 4 4 4 4 4 3 0

4 i

4 3 4 4 3 p 4 1 4 i 6 c i 0 6 i 4 ci 3 ci 4 3 p

c v c 6 v

i c i c c c Inlet 1 (B1) 4 i

c Bulk meter with logger 4 i

i i i

c 4 c c

3 4

3 3 3

3 c i

i c c

c i i i c c

c i i

i c c

4 c i

Inlet 2 (B1)

4 4

c 4 4

i i

i i i

c c c c

i Bulk meter with logger

4 4 4 4 c

4 4 4

4 i

c c v p 3 6 ci 3 6 ci i c ci

4 4 6 6 ci 4 225 pvc i 50 ci

6 ci c 1

i i

c c c i 0 ci

v 15 110 pvc c

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c 5 pvc 22

4 2 pvc

c c

4 2 c c

v v v

c pv v ci p p

p p

c 6

vc i

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c 1 4 i 2 4 4 1 vc

c c p p 25

v i i v 2 i

c c c c c 4 2 p c c vc pv 4 v v

c p p pv 5 2 2 22 2 pvc Annex -3 Training Materials (9)

Presentation Material for Public Seminar Held on 15th October, 2012

2. Pilot Activities in Borella

Key Details of Covered Area Valve installation & placing

Zone Name No of connections covered  Condition of boundary valves which are needed for the Zone – B1 584 Isolation of the sub zone were checked. Zone – B2 624 Zone – B3 360  If they cannot completely close, they were replaced. Zone – B4 453 Zone ‐ B5 814  Installed additional valves when required. Zone – B6 1109 Zone – B7 307  Data sheet shall be filled. Zone – B8 186 Zone – B9 623  Valves detected by using valve locator, Metal pipes by using Zone – B10 191 Pipe locator & PVC pipes by using leak detection instrument Total 5251 or Dalsin equipment.

Detecting buried lines & valves by using metal locator and Identification of Valves – (Borella‐1) pipe locator 4

6 6

3 3

p p

v v

c c 90 pvc V8 4 ci V9

v H3 V5 c

v c i

0 p v H4 c

1 p 0 4 c

1 5 0 v 5 p c

0 v

9 p

50 0 pvc 5 63 V6 pvc 4 ci H2 4 4 0 90 p valve locating by using V4 4 c vv c c p pvc i 0 1 V7 1 4 0 c Valve locator p v v p 4 pvc c 3 6 vc ci 3 p 6 4 i c c v 6 p 4 c 3 vc 0 v p p p 63 6 H5 1 v 1 0 3 c 5 p H6 v

c c c i v v p c 4 c pv p 0 63 c 5 c

4 4 i 4

3 v

4 4 c

pv 6 c

c 3 p

c c

i i

i i i 4 H1 c vc 50 p 4 4 V10 V3 i c c i 4 vc c 50 p v p i i 3 c c 6 4 i 3 c i c 4 2 2 i 4

1 c p

c c

4 i v c c c

c 3

ci c v v v

v p

p p p

3 3 3 3 3 V2 6

i i i

i c 4 c c c 4 4 4

4 c 4 v

4 4 4

c 4 p

4 c c c

ci c

3 i i i pv i i 6 c Inlet 4 (B2) 4 10 Ultra sonic meter 1

3 pvc 3 pv 1101 c 1

ppv

v i c

4 4 4 4

Line locating by Using i V1 c

1 4 i 6 c 0 p 4 v 6 c line stressor c Inlet 1 (B1) i Bulk meter with logger V11 i c

i c

4 Inlet 2 (B1)

i Bulk meter with logger c

4 c i c v p 3 3 i 6 c i c 4 4

6 ci i 15150 ci c

4 6 ci 225 pvc 2 pvc

Valve Installation & Zone Isolation Installation of valve V4 of B1 Valve condition survey Valve condition checking list Name of Pilot area: Name of Sub zone : Condition

Location Direction Number of Item No. Size(mm) Pipe material Valve cover Operable Need for a (Existence, (Clockwise, rotation to be Remarks (OK, Non,) (C, NC) replacement Buried) Anticlockwise) closed

V-1 V-2 V-3 V-4 V-5

Valve V-6 V-7 V-8 V-9 Installation of valve V11 of B1 V-10 H-1 H-2 H-3 H-4 Hydrant H-5

Fire H-6 W-1 W-2 out Wash W-3 No. Size Material Meter(Y, N) Condition Remarks PT-1 PT-2 Stand post PT-3 All valves, fire hydrant, Annex -3 Training Materials (9)

Presentation Material for Public Seminar Held on 15th October, 2012

2. Pilot Activities in Borella

Initial Inflow & Pressure Isolation & Metering Some selected valves will be closed(without interrupting water to zone) to minimized the feeding points.

All feeding point are metered or converted in to an accessible positions(Installation of meter chamber) to fixed mobile meters(Ultrasonic meters) when it is required.

Obtain logger measurements Preparation of customer list

Prepare the customer list of sub zone including the customer name, customer-ID, address and meter- conditions.

Customer meter condition were checked one by one house based on the customer list.

Customer list Customer List and Meter Condition Survey

Customer list should be prepared and all meter condition should be checked. Annex -3 Training Materials (9)

Presentation Material for Public Seminar Held on 15th October, 2012

2. Pilot Activities in Borella

Summery of the Survey Graphical representation of Survey data

zone name B1 B2 B3 B4 B5 B6 B7 B8 B10 Total % B9 working meters defective meters difficult to read disconnected No. of consumers 584 624 360 453 814 1109 307 186 191 4628 100 623 house closed Illegal amount working meters 84% Commen taps 26027117120 56_ 2 0% 11% 0% 13% 21% No. of working meters 543 596 289 435 762 891 287 160 164 4127 89.17459 77 5% No. of unmeter detected 12 3 1 17 6 9 0 1 3 52 1.123596 148 No. of defective detected 15 2 13 15 28 25 5 4 3 110 2.376837 360 6% No. of difficult to read 002045020 130.28089938 3% 4% 50%

1% No. of disconnected premises 0 0 3 0 12 155 3 12 9 194 4.191876 0 0% 2% No. of houses closed 7 23 47 12 8 24 12 7 12 152 3.284356 0 O&M By NGO Until taken O&M By NWSDB No. of illegal rectified 8 15 25 13 14 190 1 9 4 279 6.028522 90 over by NWSDB

Meter Accuracy test Meter testing

Out of total, at least 10% of water meters were tested randomly at site with the help of calibrated(50l) bucket On Field (Ex. 60 meters for zone B1)

Additionally, another few meters (mostly doubted once) were checked through meter testing unit

At Laboratory

Key items of leak detection Leak Detection

• The portion between ferrule to house meter point will Use of eco‐stick be checked by using Eco‐stick.

• All other areas will be checked by using Leak Detection Instrument some times by correlator.

• Pin‐point or confirmation survey can be introduces if Use of Leak detection instrument required. Annex -3 Training Materials (9)

Presentation Material for Public Seminar Held on 15th October, 2012

2. Pilot Activities in Borella

Leak map in zone B1

Use of correlator

Confirmation survey

Leak Repairing Leak Survey Details

Repairing of Main leak Summery of the Detected Leaks Deuring the survey Zone Name B1 B2 B3 B4 B5 B6 B7 B8 B9 B10 Total

Type Service 35 29 16 26 24 18 8 9 65 3 233 of the Main 12 2 2812131301 54 Repairing of Service leak leak Total 47 31 18 34 36 31 9 12 65 4 287

Leak Recording System after reparing Meter Installation for Stand Post

Leakage Record Sheet Ref. No 27

Borella -02 Date of survey: 27/10/2010 Street No, Infront of 17A Account No, House No, Main Pipe Location Pipe , Connection , Valve , Others CIP , PVC , GP, Others( ) Condition Hole , Crack , Brakeage , Packing , Unknown , Others Corrosion , Water pressure , Deterioration (Aging) Wrong Construction , Traffic load, Unknown , Others Diameter mm Cause

Location Pipe , Connection , Valube , Others PVC , GP, Others( House Connection ) Hole , Crack , Brakeage , Loose Connection , Packing , Unknown , Others Condition

Corrosion , Water-pressure , Less Adhesive , Deterioration , Wrong Construction , Traffic load , Unknown , Diameter 19 mm Cause Vandalism , Others

Depth cm Ground Asphalt , Concrete , Gravel , Grass , Soil , Others

Large , Medium , Small Leakage Quqntitiy Leakage Size (Measured) Point of Leakage

Exavation Size( m x m x m) Pipe (Dia: mm Length: m), Socket ( Pis) , Elbow ( Pis) Date of Repair : , , 2010 Time/ : ～ : ( H) Material Others ( ) Worker ( )

Other Expence( ) Annex -3 Training Materials (9)

Presentation Material for Public Seminar Held on 15th October, 2012

2. Pilot Activities in Borella

Further Reduction of Leakages Details of NRW reduction in B1 (According to IWA water balanced sheet) • Step Testing B1 Initial Measurement Flow mesurement:on 3-12 Jun, 2010 B1 After 2nd Activities Flow mesurement:on 3 - 7 Feb, 2011 Billed Metered Consumption Billed Metered Consumption • Results Billed Authorized 383.1 m3/d Billed Authorized 449.4 m3/d – Minimum Night Flow(MNF) Consumption 58.7% Revenue Water Consumption 81.8% Revenue Water 392.7 m3/d Billed Non-metered 392.7 m3/d 450.7 m3/d Billed Non-metered 450.7 m3/d – Zone 01 –56 l/Min 60.1% 9.7 m3/d 60.1% 82.1% 1.3 m3/d 82.1% Authorized 1.5% Authorized 0.2% – Zone 02 –24 l/Min Consumption Unbilled Authorized Consumption Consumption Unbilled Authorized Consumption System Input 407.1 m3/d 14.4 m3/d System Input 465.1 m3/d 14.4 m3/d – Zone 03 –108 l/Min Volume 62.3% 2.2% Volume 84.7% 2.6% – Zone 04 –100 l/Min 653.1 m3/d Unauthorized Consumption 549.0 m3/d Unauthorized Consumption 100.0% 0.5 m3/d 100.0% 0.1 m3/d 0.1% 0.0% Meter Non- ==> Meter Non- Inaccuracy Revenue Water Inaccuracy Revenue Water  Observations Apparent Losses Metering 16.5 m3/d 260.4 m3/d Apparent Losses Metering 16.2 m3/d 98.3 m3/d • No. of leaks‐06(within zone‐03 & 04) Water Losses 34.5 m3/d Inaccuracies 2.5% 39.9% Water Losses 18.0 m3/d Inaccuracies 3.0% 17.9% 5.3% Loss by Fixed 3.3% Loss by Fixed UFW 34.0 m3/d Rate UFW 17.9 m3/d Rate 246.0 m3/d 5.2% 17.5 m3/d 83.9 m3/d 3.3% 1.7 m3/d 37.7% 2.7% 15.3% 0.3% Real Losses Real Losses 211.5 m3/d 65.9 m3/d 32.4% 12.0% N t S Th t i f th i t ti l W t A i ti (IWA) N t S Th t i f th i t ti l W t A i ti (IWA)

800.0 Detail of NRW reduction in Borella 600.0

Real Loss 211.5m3/d Loss by Fixed Rate Real Loss 1.7m3/d Loss by Fixed Rate 65.9m3/d Meter Inaccuracy 17.5m3/d 16.2m3/d Area Meter Inaccuracy Illegal 16.5m3/d 0.1m3/d 400.0 Illegal Billed (unmetered) Zone Initial Amount in % Final Amount in % 0.5m3/d 1.3m3/d Free Water Outlet Free Water Outlet 14.4m3/d 14.4m3/d Billed (unmetered) 39.9 17.9 9.7m3/d B1

Billed (metered) 449.4m3/d 200.0 Billed (metered) 61.7 NRW 383.1m3/d 560 users B2 537 users reduction B3 84.1 28.6 - 60.1 26.5 Initial Measurement After 2nd Activities Fair Field in B4 60.74 43.43 Tabulated Magazine 61.6 52.4 Form B5 62.3 B6 49.5 28.5

B7 30 B8 28 B9 62 37 B10 75.6 9.7

Recorded leaks from April 2011 up to now at serpentine road

Evaluation of Achieved Results (B5)

2 0 1 4

d i

c 0

p c

i 4 v

p i

v 4

p i p v

v c

v c c v

c 4 c c

3 pvc 6

p Based on OIC office

v • 2 pvc c Difficult to reduced NRW in CI distribution areas Due to vc vc 2 p 2 p 2 pvc vc 4 ci 4 p Borella data base 110 pvc 3 Edging / Bad construction (Less cover)/ Frequent leak condition 14 3 pvc 4

19 p

v c 2 7 i c p Tot length – 550m app. v Construction of building over the lines 3 4 c 9 8 Product –4”Ø CI 3 4 ci 5 15 Detection difficulties (difficult reach up to leak position/water 16 Total leaks_ 19 i c 4

p c

logged condition) v c i v

c 12 c c v p i p

12 3 c 4 16 4 v 6 ci 2 p 4 12 ci 17 13 1 With out proper reasons 3 4 12 c i vc p ci 4 p vc 3 17 12 Due to sudden reasons 3 pvc • Difficult to reduced NRW in Tenement gardens Due to 2 (ex: while operating, 10 by other local 3 ci 3 pvc i 3 i

c 4 ci 3 ci 2 5 3 3 4 pvc 6 3 pvc 1 3 pvc 0 4 pvc 4 pvc c 3 Authorities) 3 pv

p p

v v

c Bundle pipe condition c

c 11 90 pvc 3 pv

3 3

c c 4 ci

4 i i 4 ci

ci c cc i 3 vv c

i v c 4 c i

0 p v c

1 p

4 0 0 c

5 0

 4 v 5 Illegal activities p c i i 0 4 c 9 pvc 90 50 pvc 4

c c v

i v

i c

p c

c p

c v

v v c p c

0 v

4 p 0

9 p

v v c

1 0 p 9

p 9 0 p v

1 0

0 p

9 c 4 ci

1 4

5 9 0 v

v i

1 0 p

2 1

4 c

1 9 0 2 9 c 9 i 4

pvc 10 1 1 60 4 Annex -3 Training Materials (9)

Presentation Material for Public Seminar Held on 15th October, 2012

2. Pilot Activities in Borella

Recorded leaks from August 2011 up to now in 141 watta at serpentine road (B5)

vc 4

p p

v i c 3 c

3 c

3 3 p 3 v Based on OIC office c 4 ci vc 4 p Borella data base

4 4 2 p

p vc Tot length – 350m app. v c 2 pvc Product –3”ØPVC(50m) 2”ØPVC 300m) CI line berried under the building at 12” CI Pipe at Serpentine Road 9 Total leaks_11 Serpentine road 10

With out proper reasons i

11 i

c 4 c

4 c 4 4 8 i

4 pv

p c 1 vc Due to sudden reasons 6 (ex: while operating, by other local 7 Authorities)

c 2 i c p

v 3 2 3 c

i 5 c

p c

v i c v

Ferrule Brocken due to ageing at Serpentine c 1 c v p 2 ci p

3 4 road 4” CI Pipe at Pelangasthuduwa Road 12 ci 4

Bundle pipes

Line to tenement garden 141 at Serpetine road • Cover about 6” • Tee connection without ferrule (artificial hole)

Illegal usage

Recorded leaks from January 2011 up to now at Gothami road Out Come of the Project (B1) Physical progress Based on OIC office

c Borella data base v

0 5 Zone B1 B2 B3 B4 B5 B6 B7 B8 B9 B10 Total 6 3 pvc 3

4 Tot length – 650m app.

9 4 _4 0 14 190 1 9 279 No of illegal connections removed 8152513

v c Product –4”ØCI

2 4 pvc 1 Total leeaks_5 Rectification of Over flow tanks 11210 _ _ ___1226 With out proper reasons

i v

c 4 4

3 v

c p

i c 0 1 120 2 168

4 i No of unmeterd places metered 9311769 Due to sudden reasons i ci c 4 (ex: while operating, No. of defective meters changed 152 13152825 5 4 360 3 470

2 i 4

c p c

v 4 3 i ci c by other local

Authorities) No of commen taps removed 1_022200007

c 4

4 c c v ci

i p i i c 0 4 1 1 No. of new conections given 8_3______11

3 p 3

vc pvc Meter sealing proceses 550_350______900

4 4

i c 4

i c 5 4

i c

4 Annex -3 Training Materials (9)

Presentation Material for Public Seminar Held on 15th October, 2012

2. Pilot Activities in Borella

Physical progress continued….. Summery of Out Come zone name B1 B2 B3 B4 B5 B6 B7 B8 B9 B10 Total 12"ɸ 21 3 No. of sluse‐valves & wash‐out(FH) 6"ɸ 11 trace & surfaced 4"ɸ 8324 791 11137 B1 B3 B4 B6 B9 B10 Total 2"ɸ 11 6"ɸ 5 5 Amount of water saving No. of new sluse‐valves & wash‐ 4"ɸ 65 64 4 1 127 3 104.1 901.0 252.0 277.0 101.0 0.3 1,635.4 out(FH) installed 2"ɸ 235 (m /day) Length of newly layed commen mains 3"ɸ 90 200 290 (m) 2"ɸ 60 450 510 Meter Chambers installed 2412221 115 No. of connections transferred 3 21 125 149 Replaced length of bunddle pipes(m) 15 840 4800 5655

Problems Encountered How to Overcome

• Inaccuracy of the current drawings • Use of modern equipment (used to find burried valves and • Lack of valve location details leaks) • Burried and non function condition of the existing valves • Regular meeting helps to share the experience, gain new • Difficulty of gaining approval from local authorities (Presently RDA knowledge and change bad attitudes not giving approval to excavate some of their roads) • Consumer related problems minimized by acknowledging the • Consumer relation problems community about NRW activities • Old & complicated service Distribution & High Leak System • Initiation of a leak detection and repairs • Scaling of old Distribution network • Programme for routine night survey • Work with restriction due to Motor Traffic and City Congestion • Implementation of meter sealing process (to minimized illegal activities)

Obtain benefits Future Expectations • Methodical approach to identify the way of reduction of NRW. • Regular night survey for identification of visibal leaks • Use of modern equipment for asset management. • Implementation of same procedure for other areas which • Pressure improvements( in B1, some area’s pressure increase from are not covered through this project. 2m to 6m) • Implementation of regular monitoring activities for • Significant reduction of NRW minimized estimated bills. • Capacity development of engaged personnel. • Introduction of valve operating routine system, specially for • Encourage an improved service level to consumer. washouts. • Able to include new consumers in to the billing system (By • Implementation of Meter sealing work for other areas which eliminating common taps and giving new connections to surround are still not covered. people as well as elimination of illegal connections). • Regular monitoring system of NRW variation in completed • Improvement of consumer satisfaction as well as their relationship. sub‐zones. • Control of illegal connections, vandalism and misuse of supply. Annex -3 Training Materials (9)

Presentation Material for Public Seminar Held on 15th October, 2012

2. Pilot Activities in Borella

Schedule of FH/WO flushing Year Scheduled Night Leak Survey Zone Wash out no. Month 1Month 2

Week 1Week 2 Week 3 Week 4 Week 1 Week 2Week 3 Week 4 FH1 √ Year FH2 √ Night leak Month 1Month 2Month 3Month 4Month 5Month 6Month 7Month 8Month 9Month 10 Month 11 Month 12 FH3 √ B1 FH4 √ Survey Week 3 Week 3 Week 3 Week 3Week 3 Week 3Week 3 Week 3 Week 3Week 3 FH5 √ B1 √ FH6 √ FH1 √ B2 √ B2 FH2 √ B3 √ FH3 √

B3 WO1 √ B4 √ FH1 √ B5 √ FH2 √ B4 FH3 √ B6 √ FH4 √ B7 √ B5 FH1 √

FH1 √ B8 √ FH2 √ B9 √ FH3 √ B6 FH4 √ B10 √ FH5 √ Remaining FH6 √ √ B7 area B8 Remaining B9 √ B10 FH1 √ area

Lesson Learn It is found that the major reason for the NRW is due to the leaks of the existing pipe network Thank You ○ Systamatic night leak survey is very important ○ Rapid engagement to leak repair works is a must o Replacing of old CI lines as well as selected PVC line will be very important Annex -3 Training Materials (9)

Presentation Material for Public Seminar Held on 15th October, 2012

3. Pilot Activities in Kotahena

Pilot Zone ‐ Kotahena Introduction – Pipe born system commence in 1886 which is Western Central Region one of the oldest pipes system in Colombo city.

Colombo City

M (CC – N & E) M (CC – S & W)

AE –CC(Mattakkuliya)

OIC (Kotahena)

1,400

Real Loss

1,200 Loss by Fixed Rate Meter In ac cu ra cy 1,000 Il le gal Area of the zone :- 0.056 km2 Free Wat er 900m3/d Length & Dia. Of the Pipes 915m3/d Outlet 800 Bi ll ed 3 (un met er ed ) 12 45Bi ll ed ( mete re d) 565m3/d 572m3/d Distribution Length - 600 4"CI - 407 m 328m3/d 5"CI - 300 m 186m3/d 160 mm PVC - 692 m 400

200 247m3/d 247m3/d 247m3/d 278m3/d 278m3/d Number of Consumers :- 397 173m3/d 0 Initial Measurement After Primary Activities Before 2nd Activities After 2nd Activities After 3rd Activities (1) After 3rd Activities (2)

Transitional Change of Water Balance According to NRW Reduction Activities (K1)

Step 1( Primary Activities) Step 2( Before 2nd Activities)

Initial After Primary After six month without any NRW reduction activities Components Measurement Activities m3/day (%) m3/day (%) After Primary Before 2nd Billed 173.0 13.4% => 246.7 26.9% Components Activities Activities Billed Authorized (metered) RW m3/day (%) m3/day (%) Consumption Billed 27.3 2.1% => 2.3 0.3% (unmetered) Billed Billed Authorized 246.7 26.9% => 246.7 19.5% Unbilled Unbilled un- Free Water RW (metered) Authorized metered 78.8 6.1% => 78.8 8.6% Consumption Billed Consumption Consumption Outlet 2.3 0.3% => 2.3 0.2% Unauthorize (unmetered) Illegal 85.7 6.6% => 17.1 1.9% d Unbilled Unbilled un- Free Water NRW Authorized metered 78.8 8.6% => 78.8 6.2% Apparent Meter 7.4 0.6% => 6.8 0.7% Outlet Losses Metering Inaccuracy Consumption Consumption Loss by Inaccuracy 23.0 1.8% => 1.3 0.1% Unauthorize Illegal 17.1 1.9% => 17.1 1.4% Fixed Rate d NRW Real Losses Re al Loss 899.8 69.5% => 565.0 61.5% Apparent Meter 6.8 0.7% => 6.8 0.5% Losses Metering Inaccuracy Total System Input 1,295.0 100.0% => 918.0 100.0% Loss by Inaccuracy 1.3 0.1% => 1.3 0.1% MNF (l/min) 690 330 Fixed Rate MNF (converted to m3/day) 994 475 Real Losses Real Loss 565.0 61.5% => 915.0 72.2% Pressure at MNF (m) 18.6 19.5 Measured on: 19-26 May, 2010 11-22 Nov, 2010 Total System Input 918.0 100.0% => 1,268.0 100.0% MNF (l/min) 330 600 • 41 meters were installed for Un-metered locations MNF (converted to m3/day) 475 864 Pressure at MNF (m) 19.5 18.2 • 18 meters were replaced for defective Measured on: 11-22 Nov, 2010 5 - 9 May, 2011 • 49 connections were Legalized • 56 leaks were repaired (Main :- 03 , Service :- 53) • Value of the real loss was increasing ( More leaks) • Ball valves were installed for two storage tanks Annex -3 Training Materials (9)

Presentation Material for Public Seminar Held on 15th October, 2012

3. Pilot Activities in Kotahena

Step 3 (After Second Activities) Step 4 ( After 3rd Activities(1)) Before 2nd After 2nd After 2nd After 3rd Components Activities Activities Components Activities Activities (1) m3/day (%) m3/day (%) m3/day (%) m3/day (%) Billed 246.7 19.5% => 246.7 26.7% Billed Authorized (metered) Billed RW 246.7 26.7% => 278.3 48.7% Consumption Billed Authorized (metered) Billed 2.3 0.2% => 2.3 0.2% RW (unmetered) Consumption Billed 2.3 0.2% => 2.3 0.4% Unbilled Unbilled un- Free Water Authorized metered 78.8 6.2% => 78.8 8.5% (unmetered) Consumption Consumption Outlet Unbilled Unbilled un- Free Water Authorized metered 78.8 8.5% => 78.8 13.8% Unauthorize Illegal 17.1 1.4% => 17.1 1.9% Outlet d Consumption Consumption NRW Apparent Meter 6.8 0.5% => 6.8 0.7% Unauthorize Losses Metering Inaccuracy Illegal 17.1 1.9% => 17.1 3.0% Loss by d Inaccuracy 1.3 0.1% => 1.3 0.1% NRW Fixed Rate Apparent Meter 6.8 0.7% => 6.8 1.2% Losses Metering Inaccuracy Real Losses Real Loss 915.0 72.2% => 572.0 61.8% Loss by Inaccuracy 1.3 0.1% => 1.3 0.2% Total System Input 1,268.0 100.0% => 925.0 100.0% Fixed Rate MNF (l/min) 600 330 Real Losses Real Loss 572.0 61.8% => 186.3 32.6% MNF (converted to m3/day) 864 475 Pressure at MNF (m) 18.2 18.3 Total System Input 925.0 100.0% => 571.0 100.0% Measured on: 5 - 9 May, 2011 24-26 Jun, 2011 MNF (l/min) 330 120 MNF (converted to m3/day) 475 173 Pressure at MNF (m) 18.3 17.1 Measured on: 24-26 Jun, 2011 26-27 Oct, 2011 590 metres CI Pipe lines were abandoned 782 metres Common pipes were installed &meters were connected to common pipe (Normal action for bundle pipe Disconnection of bundle pipes at ferrule or nearest point replacement) Step testing and leak repairing

Method of Abandonment of the CI pipe line Laying of common Pipes lines & Replacement of Bundle Pipe

Activities Preparation of Manual for bundle 1.Site Survey for identifying pipe replacement house connections from CI • Preparation stage 2.Transfer identified * Preparation of drawings & BOQ connections to existing PVC •Construction Stage 3.Disconnection of CI line at *Installation of branch and Valve identified locations. * Recording of valve & pipe positions * Laying of house connection pipes and take records * Disconnection of existing connection at ferrule or nearest point * Leak test •After Construction Stage *Preparation of as – built drawings

Preparation of Drawings & BOQ Installation & Recordings Annex -3 Training Materials (9)

Presentation Material for Public Seminar Held on 15th October, 2012

3. Pilot Activities in Kotahena

Disconnection of Existing Connections Step 5( After 3rd Activities(2))

After 3rd After 3rd Components Activities (1) Activities (2) m3/day (%) m3/day (%) Billed Billed Authorized 278.3 48.7% => 278.3 39.0% RW (metered) Consumption Billed 2.3 0.4% => 2.3 0.3% (unmetered) Unbilled Unbilled un- Free Water Authorized metered 78.8 13.8% => 78.8 11.1% Consumption Consumption Outlet Unauthorize Illegal 17.1 3.0% => 17.1 2.4% d NRW Apparent Meter 6.8 1.2% => 6.8 1.0% Losses Metering Inaccuracy Loss by Inaccuracy 1.3 0.2% => 1.3 0.2% Fixed Rate Real Losses Real Loss 186.3 32.6% => 328.3 46.1%

Total System Input 571.0 100.0% => 713.0 100.0% MNF (l/min) 120 200 MNF (converted to m3/day) 173 288 Pressure at MNF (m) 17.1 22.9 Measured on: 26-27 Oct, 2011 10-12 May, 2012

The flow measurement was conducted after Six month

Parallel Execution Summaries of the zones No of Mai n Pipe length(m) No of free water Imple mented Isolation y Zone Area(km2) consumers PVC CI GI Total outlet Activities Me tho d Works in other sub zones up to K1 0.056 397 692 707 1399 14 Primary & 2nd ActivitFull Zone K2 0.066 426 ‐ 1468 1468 33 Primary Full Zone K 10 were completed K3&4 0.256 1383 173 7160 7333 19 Primary Full Zone K5 0.091 115 ‐ 867 867 4 Primary Sample y Due to difficulty of isolation, the K6 0.15 159 336 2307 2643 Primary Full Zone K7 0.239 1545 262 4617 304 5183 3 Primary Sample sample zone was selected for K8 0.138 769 776 1668 269 2713 Primary Sample K9 0.196 201 114 3669 887 4670 3 Primary Sample some zones by considering easy K10 0.08 300 65 2163 2228 Primary Sample isolation * Primary Activity :‐ Customer suevey 2nd Activities Step testing Leak repairing Acuostic Survey CI Pipe replacement Bundle pipe replacement Pinpoint survey

Cofirmation survey Leak repairing

Results of the zones Benefits

Initial Flow Final flow Saving Amount Method of y Pressure Improvement in Kotahena Area Zone (m3/Day) (m3/Day) Initial NRW Final NRW (m3/Day) Isolation Activity y Familiarizing with New Technology Primary & K1 1295 571 85% 56% 724 Full 2nd Activity y Methodical approach to address Water Loss K2 1245 933 78% 72% 312 Full Primary Management K3&4 4240 3989 73% 71% 251 Full Primary K5 120 115 59% 55% 5 Sample Primary y K6 1720 46% Full Primary Team Work Effects K7 201 194 65% 64% 7 Sample Primary K8 79 Sample Primary y Sharing Knowledge With Japanese Experts K9 473 Sample Primary K10 Primary y In depth information about the existing system

y Supplying a good service for consumers Annex -3 Training Materials (9)

Presentation Material for Public Seminar Held on 15th October, 2012

3. Pilot Activities in Kotahena

Learning…. Saved 1300 m3/day y Importance of Valve and its Workability y Importance of Realistic Map

y Leak Repair is not effective in a deteriorated system.

y Replace Bundle Pipes

y Replace Deteriorated CI Pipes

y Abundant pipe to be Completely Removed

y House to house survey gave more information for O&M activities

y Effectiveness of Weekly Meeting

有難うございます Annex -3 Training Materials (9)

Presentation Material for Public Seminar Held on 15th October, 2012

4. Outline of Execution Plan and Recommendation

General-1/7

Outline of Execution Plan (Draft) Purpose: To disseminate the NRW reduction activities to entire EXECUTION PLAN (Draft) Colombo City based on the findings obtained through on the Project. Discusses on: NRW Reduction in Colombo Old & deteriorated pipes must be replaced ASAP, but they cannot be replaced at once. It will take years. This plan intends to discuss what we can do to reduce October 2012 NRW while waiting for pipe replacement. NRW Reduction Management Team And activities mentioned in this Plan will be also useful for O&M for new system.

1 2

General-2/7 General-3/7 Prepared by NRW Reduction Management Team Contents of Execution Plan (with assistance of JICA Expert Team) •Part A • AGM (NRW) as the Project Leader – Outline of the Project •AGM (O&M) – Findings of the Project • AGM (Development) •Part B • Manger (NRW) – Execution Plan • Manager (O&M) • Manager (Development) • Manager (Colombo City – N/E)

3 4

General-4/7 General-5/7 PART A: CAPACITY PART B: EXECUTION PLAN DEVELOPMENT PROJECT Chapter B1 Policy and Target of NRW Reduction Chapter B2 Improvement of Measurement System Chapter B3 Unbilled Authorized Consumption Chapter A1 Outline of the Project Chapter B4 Reduction of Apparent Losses ⇒ (explained by AGM-NRW) Chapter B5 Reduction of Real Losses ⇒ (will be explained by Manager-NRW in detail)

Chapter B6 Improvement of GIS ⇒ (will be explained by engineer for GIS in the Project)

Chapter A2 Findings in the Project Chapter B7 PR Activities ⇒ (will be explained by PR Officer in detail) Chapter B8 Organizational Improvement Chapter A3 Water Audit Chapter B9 Evaluation and Monitoring of Implementation ⇒ (explained by OIC Kotahena & Borella) Chapter B10 Other Recommendations ⇒ (refer to the Execution Plan)

5 6 Annex -3 Training Materials (9)

Presentation Material for Public Seminar Held on 15th October, 2012

4. Outline of Execution Plan and Recommendation

General-6/7 IWA’s Terminology for NRW General-7/7

Billed Authorized Billed Metered Consumption Revenue Supporting Report Consumption Billed Non-metered Water M3/year M3/year Authorized Consumption Consumption Unbilled Metered Unbilled Consumption (water used for 3 1: Results of Pilot Activities M /year Authorized fire fighting, etc) Consumption M3/year Unbilled Un-metered 2: Manual for Bundle Pipe Replacement Consumption System (free water distributed at Input standpipes) 3: Manual for Operation Methods of Leakage Volume Unauthorized Consumption Non- Apparent Revenue M3/year Losses Water Detection Equipment 3 Metering Inaccuracies M /year 3/year Water M Losses 4: Leakage Recording System Leakage or Transmission and/or Distribution Mains M3/year 5: GIS Improvement Methods Real Losses Leakage and Overflows at M3/year Utility’s Storage Tanks Leakage on Service 6: Cost and Benefit Connecting up to Customers’ Metering

Note: Source - The categories of the international Water Association (IW A), 7 8

B1-2/2 Chapter B1 Policy and Target B1-1/2 of NRW Reduction Execution Plan discuss the activities to • Fundamental solution: be taken: – Pipe Replacement / Rehabilitation is inevitable to reduce NRW • Before completion of pipe replacement / • However, other activities are also necessary to rehabilitation. bring down NRW to acceptable level such as: • In the area where pipe replacement / – Reduction of free water rehabilitation takes time. – Reduction of unauthorized consumption • After pipe replacement. – Reduction of administration losses – Active Leakage Control • This Execution Plan can be: effective not only to current system, 9 but also to future new system.. 10

B2-1/1 B3-1/1 Chapter B2 Improvement of Monitoring/ Chapter B3 Unbilled Authorized Measurement System Consumption Measurement of Inflow to the system is a must to • Findings in Pilot Areas: know the NRW. The more total NRW reduced, the more However it is very difficult and requires huge input to contribution of free water increase. isolate the system, according to a finding/experience obtained by the Project. Therefore… It is important to encourage continuation / improvement of Wait for Formation of DMA Current Program of Monitoring of DMA will help selection of the Randiya Project and problematic (priority) area and reduction of community formation. activities. 11 12 Annex -3 Training Materials (9)

Presentation Material for Public Seminar Held on 15th October, 2012

4. Outline of Execution Plan and Recommendation

B4-1/6 B4-2/6 Chapter B4 Reduction of Apparent 1. Reduction of Unauthorized Consumption Losses NWSDB is undertaking inspection of illegal 1. Unauthorized consumption connection at random base. • Illegal connection Need for Improvement of Methods : 2. Metering Error • Inaccuracy of Meters Alternative 1 (Highly recommended option): • Reading errors by meter readers – Meter readers to collect customer information •Fixed rate – OIC office to analyze the data to find suspected houses. – To inspect at suspected houses. 13 14

1. Reduction of Unauthorized Consumption (continued) B4-3/6 1. Reduction of Unauthorized Consumption (continued) B4-4/6

Alternative 2 Other effective methods to reduce – If “Alternative 1” is difficult, suspicious users unauthorized connection may be narrowed down with reference to • PEP is recommended for Service Connection to existing data prevent unauthorized connection. It will become • Extremely low consumption user (by billing record), difficult for customer to tamper PEP connection. • Previous record of illegal case (PEP will also contribute to reduction of leakage • Disconnected place to a large extent.) • Area that free water outlet has been removed • Meter sealing will be efficient to prevent – For the narrowing down suspicious users, tampering of meters. above information can be overlaid on base • Education and PR activities; Customers shall map by using GIS database know that it is illegal to touch / repair service 15 connections before customer meters. 16

B4-5/6 2. Metering Inaccuracy (continued) B4-6/6 2. Metering Inaccuracy Proposed Revised (new) Tasks of Meter Recommendation to improve metering: Readers – Periodical replacement of customer meters – Customer relation – Appeal “Call 1939” – Periodical check of meter accuracy – Read master meter and child meter – Preventative maintenance of bulk meters – Read public standpost reading – Improvement of accessibility to meters by relocating to outside the houses – Find and Inform visible leakage to OIC – Enhancement the roles of Meter Readers/ – Customer survey: Education Requirement for the improvement –Rotationsystem of meter readers – Education / Training – Application of special (high) rates to continuous –Uniform estimated (fixed) rates customers – Rewarding (Giving recommendation) 17 18 Annex -3 Training Materials (9)

Presentation Material for Public Seminar Held on 15th October, 2012

4. Outline of Execution Plan and Recommendation

B5-1/7 B5-2/7 Chapter B5 Reduction of Real Losses Cost vs. Benefit by Reduction of Real Loss • Real loss ⇒ Most important factor to be tackled 1. Estimate required cost for reduction of Details will be presented by Manager (NRW) real loss • In this presentation, cost vs. benefit by 2. Estimate volume of water saving by reduction of real loss is presented. NRW Reduction Activities 3. Compare required cost vs. benefit brought by NRW reduction activities

19 20

B5-4/7 B5-3/7

1. Required Cost for Reduction of Real Loss (1/2) 1. Required Cost for Reduction of Real Loss (2/2) • List up necessary works: • Unit cost setting – Sub-zone selection – NWSDB Rate Book (2011) – Isolation &installation of chambers – Interview with NWSDB – Initial flow measurement – Establish initial NRW • Estimation of necessary quantities of works – Leak survey, repair work & recording into database – Estimation of average number of leakages, based on – Flow measurement after repair the findings thru Pilot Activities – Establish NRW after repair – Estimated for two cases: – Further leak detection, repair & recording into • Borella-similar area (relatively better condition) database • Kotahena-similar area (relatively poor condition) – Flow measurement after further repair • Then calculate total required cost. – Establish NRW after further repair 21 22

B5-5/7 B5-6/7

2. Water Saving by NRW Reduction Activities (1/2) 2. Water Saving by NRW Reduction Activities (2/2) • Estimation of average water saving • Estimation of average water saving (m3/month) (m3/year) – Based on the findings thru Pilot Activities – Considers rebounding of real loss after repair, – Categorized in two cases: with reference to the result of Pilot Activities • Borella-similar area (relatively better condition) • Borella-similar area: 10% assumed to go back to original status in 11 months • Kotahena-similar area (relatively poor condition) after repair • Kotahena-similar area: 20% assumed to go back to original status in 6 months after repair

23 24 Annex -3 Training Materials (9)

Presentation Material for Public Seminar Held on 15th October, 2012

4. Outline of Execution Plan and Recommendation

3. Cost vs. Benefit of Leak Detection/ Repair (1/1) B5-7/7 B6-1/1

Required Cost per 5,000 Benefit per 5,000 Connections Connections *1) Chapter B6 Improvement of GIS *2)

Saved Real Loss per 5,000 Details will be presented by person in charge of GIS. Unit Rate Connections for Water Benefit Cost (LKR/y) (LKR/m3) *3) (m3/y, (LKR/y) (m3/d) 4) *5) compensated) Borella-simillar Area 3,856,252 1,886.0 311,191.2 24 7,468,589 Kotahena-simillar Area 5,030,460 1,855.4 166,988.4 24 4,007,721

*5): Unit amount (LKR) per water loss (m3) specified by NWSDB for cost vs. benefit calculation. Chapter B7 PR Activities

• Saving volume at initial stage ⇒ Details will be presented by PR Officer. no big difference b/w B-similar & K-similar • Rebound rate in K-similar is higher than in B-similar • If proper bundle pipe works can be done together with leak repair, rebounding rate may be moderated. ⇒ benefit in K- 25 26 similar can be increased

B8-1/1 B9-1/1 Chapter B8 Organizational Chapter B9 Evaluation and Improvement Monitoring of Implementation To do activities mentioned in the Execution Plan practically, • Evaluation and monitoring committee to following additional input may be required: monitor the activities and evaluate the • One GIS operator for GIS update + one Engineer to supervise performance. • Leak Detection Team • Periodical water audit will be useful. (6 month / team – one Zone officer area of 5,000 connections) 1 team for 1 OIC - 8 Teams • A staff for Leak Repair Record Keeping at OIC office (and customer data) • Team for Customer Survey, if meter readers do not execute

27 28

B10-1/1 Chapter B10 Other Recommendations

For O&M improvement THANK YOU For system improvement For improvement of Water Act Refer to the Execution Plan for further detail.. VERY MUCH

29 30 Annex -3 Training Materials (9)

Presentation Material for Public Seminar Held on 15th October, 2012

5. Improvement of GIS for O&M in entire CMC

Capacity Development Project For Non Revenue Water (NRW) Reduction Presentation content In Colombo City. • GIS Background and Resources in NWSDB • About Pilot project • Activities to be implemented on Colombo city • Benefits associated with GIS ( According to Pilot project)

D.T.S.U. Dissanayake Engineer O&M (C-S)

Currently Available data at NWS&DB Presentation content for Greater Colombo Base map • GIS Background and Resources in NWSDB Developed under Norad Project using • About Pilot project Year 2000 areal Photograph. • Activities to be implemented on Colombo city Water utility network • Benefits associated with GIS ( According to Pilot project) Developed under Norad Project using Norplan maps, As built data and field information. (2000 – 2006)

Base Map need to be updated due to rapid changes Water utility network includes pipelines, Physical changes due to development during Last 12 years Valves, Fire Hydrants, Standposts, Storages etc Examples To be updated There are several new objects and Information, which are not included in the GIS database and The database shall be updated. Annex -3 Training Materials (9)

Presentation Material for Public Seminar Held on 15th October, 2012

5. Improvement of GIS for O&M in entire CMC

At the moment the GIS database is Presentation content not using in O&M • GIS Background and Resources in NWSDB • About Pilot project • Activities to be implemented on Colombo city NWSDB is going to use GIS database in O&M work • Benefits associated with GIS ( According to Pilot project)

About Pilot project Preparation final database NWS&DB • Area :- Borella and Kotahena Billing Other data Surveyed data • Base map :- Digitized infrastructures Records (Pictures, Tie using high resolution satellite images. by the Project measurement etc.) • Consumer locations :- Field data collection using high accuracy GPS. • Other important locations :- Field data GPS Meter collection using high accuracy GPS. locations and Consumer data • Data Entering :- Using Arc GIS platform. • Product :- Consumer database with survey and Billing data. For OIC usage

Example of consumer database GIS usage under pilot project Each OIC has a computer and GIS software

O&M Staff already started bringing maps to the site Findings at the field are inform to Maligakanda office for update of the database Annex -3 Training Materials (9)

Presentation Material for Public Seminar Held on 15th October, 2012

5. Improvement of GIS for O&M in entire CMC

Proposed execution plan for Colombo city

Presentation content Update existing Base map using satellite images • GIS Background and Resources in NWSDB Collecting consumer information by field visit • About Pilot project Locate consumers on the base map • Activities to be implemented on Colombo city Preparation of Consumer database • Benefits associated with GIS ( According to Carrying GPS field survey to locate valves, Pilot project) bulk meters, Free water outlets etc. Update water network database with collected data

Major finding in pilot project

Locating consumers using GPS is a Presentation content time consuming task • GIS Background and Resources in NWSDB Modified and the simple alternative method • About Pilot project Will be introduced • Activities to be implemented on Colombo city Details included in the execution plan • Benefits associated with GIS ( According to Supporting report 5 Pilot project) “GIS improvement for O&M”

What we can do with GIS database What we can do with GIS database ( According to Pilot project ) ( According to Pilot project ) As an updated Base map Response to customer complain Overlay operation Maintain Repair records Exploring pipe information, Valves, Frequent leakages Standpost, ect Selection of routes and cost estimation Selecting of High priority illegal for new connections connections Asset management and Condition assessment Annex -3 Training Materials (9)

Presentation Material for Public Seminar Held on 15th October, 2012

5. Improvement of GIS for O&M in entire CMC

Exploring pipe information Overlay operation By attribute Table

Buildings

Utility cables or pipes

Water bodies

Administrative data

Customer locations

Exploring pipe information Exploring pipe information Selecting an object Querying Objects

Exploring Valve information Exploring Valve information Same thing can be done as pipelines Link to Documents & Pictures Annex -3 Training Materials (9)

Presentation Material for Public Seminar Held on 15th October, 2012

5. Improvement of GIS for O&M in entire CMC

Exploring Valve information Response to customer complain Link to Tie measurement Call 1939 Address or AC no

Customer

Quick recovery Team leaving Get all relevant service with required information from instruments GIS databases

Maintain Repair records An idea to select illegal survey locations

Previous Illegal connections

No water connections

Extremely low consumption

Distance from Free water outlets

Selected Connections for survey

Example of selecting illegal survey locations in B4 area Example of selecting illegal survey locations in B4 area Previous Illegal connections No water connections Annex -3 Training Materials (9)

Presentation Material for Public Seminar Held on 15th October, 2012

5. Improvement of GIS for O&M in entire CMC

Example of selecting illegal survey locations in B4 area Example of selecting illegal survey locations in B4 area Extremely low consumption Far from Public stand post 50m buffer Stand Post

20m buffer

These houses are faraway from stand post & No water connection

High priority location for illegal survey Leak locations - Kotahena

These houses are faraway from stand post & No water connection

Leak locations - Borella Benefits associated with GIS

• Improved quality of service to the consumer • Improved field activities • Reduced operating costs • Security of data • Map updating • Production of hardcopy • Avoided duplication / consistency of information Annex -3 Training Materials (9)

Presentation Material for Public Seminar Held on 15th October, 2012

6. Reduction of Real Losses (Leakage)

To meet increasing water demand in the country

To avoid requirement of new water sources

To avoid unnecessary production at plants

To defer high capital cost for new water treatment plants

To avoid tariff increase

T.B.Heenkenda B.Sc.Eng(Hons),C.Eng,MIE(SL),PG.Dip(Stuct) Manager(WLM)

Main Break or Pipe fracture Crack Pinhole Leakage on Packing Glands of pumps or valves Pipe joint leaks Leaking service connection pipe

Reservoirs, sumps, overhead tank Network deterioration leaks and overflow Poor installation Flushing hydrant Flushing main line Inadequate cover Tank backwash

Bundle pipe

Incorrect material Annex -3 Training Materials (9)

Presentation Material for Public Seminar Held on 15th October, 2012

6. Reduction of Real Losses (Leakage)

Leakage Control Options

¾ Passive control

– Respond only to reported faults (present policy) – Requires least effort but results in highest leakage levels – Normally only cost-effective where water is very cheap (little pumping and treatment)

¾ Active control options

– Regular sounding – Zonal metering – Pressure control

¾ Pressure control • Reduce pressure and leakage without affecting the supply to consumers • Location of leaks not required Reported leaks and breaks Typically high flow rates, short run-time notified to ¾ Regular sounding the water utility customers etc • Systematically sound pipes to locate leaks • Need many trained inspectors Unreported leaks and breaks • Only cost-effective where the value of water is high Typically moderate flow rates, long run-time located by active leak control ¾ Zonal metering (District Metering Areas - DMA’s) • Regularly (weekly/monthly) monitor net zone inflow to determine flow characteristics and leakage level, identify the worst affected areas and Background leakage undertake leakage detection surveys (mostly at joints and fittings) flow rates too small to be detected if hidden • cost-effective where the value of water is high generally Annex -3 Training Materials (9)

Presentation Material for Public Seminar Held on 15th October, 2012

6. Reduction of Real Losses (Leakage)

Total No of Service leak per 100 connection 6.40% Total No of Service leak per 100 connection 4.75% No of service leak detected from acoustic method 3.64% No of service leak detected from acoustic method 3.40% No of service leak detected from Pin point method 110%

Report all the leak to relevant OIC through Call centre Prepare Repair order sheet and give to Zone officer Repair leakage quickly and fill Repair order sheet Record information to data base and locate at GIS Annex -3 Training Materials (9)

Presentation Material for Public Seminar Held on 15th October, 2012

6. Reduction of Real Losses (Leakage)

Demarcation of Leak Repair Details

Installation of common pipe Meter installation near the main pipe Replacement with PEP

Prepare list of tanks(sumps) and collect information Install bulk meter on all the inlet pipes The shortage to be arranged to charge from community or consumer

1,400.0

1,200.0

1,000.0

800.0

Real Loss 952.7m3/d

600.0

Loss by Fixed Rate Loss by Fixed Rate 10.0m3/d 0.0m3/d

400.0 Meter Inaccuracy Meter Inaccuracy 7.6m3/d 6.3m3/d

Illegal Illegal Real Loss 7.5m3/d 25.0m3/d 67.0m3/d 200.0 Free Water Outlet Free Water Outlet Billed (unmeter ed) Billed (mete red) 0.0m3/d 0.0m3/d Billed (mete red) 10.1m3/d 177.6m3/d 201.3m3/d Billed (unmeter ed) 321 user s 345 user s 0.0m3/d ‐ Initial Measur ement After Primary Ac tivities

Initial Measurement After Primary Activities

Billed (unmet er ed) 0.9% Free Water Real Loss Loss by Fixed Outlet 23.7% Billed (mete red) 0.0% Rate 15.0% 0.0% Illegal 2.1%

Meter Inaccurac y Billed Meter Inaccuracy (met er ed) - 2.2% 0.6% 71.4% Loss by Fixed Real Loss Rate Illegal 80.5% 0.8% 2.7%

Free Water Outlet Billed 0.0% (unmet er ed) 0.0% Annex -3 Training Materials (9)

Presentation Material for Public Seminar Held on 15th October, 2012

6. Reduction of Real Losses (Leakage)

Implementing Leakage Control in District Meter Areas Step Testing

¾ Step testing is a technique used to locate the areas of greatest leakage within a zoned distribution system.

¾ The test is undertaken at night during the period of minimum demand when leakage rates are highest.

¾ The areas identified with high leakage levels can then be given priority attention for leakage surveys.

Boundary Valve

MNF= 50 l/Min Approximate number of connection=75

Boundary Valve

5” CI

MNF= 150 l/Min Approximate number of connection=125

Flow Meter 160mm PVC

Boundary Valve

MNF= 100 l/Min Approximate number of connection=160

Average Flow for K1( Step testing on 3rd August 2011)

400 20

18 350

16 300 14

250 12

200 10 Average Flow (l/Min) Pressure (m) 8 150

6 100 4 After closing Branch Valve at 50 1:28 am MNF= 150 l/min After closing Branch Valve at 2 1:48 am MNF= 100 l/min 0 0 1:01 1:04 1:07 1:10 1:13 1:16 1:19 1:22 1:25 1:28 1:31 1:34 1:37 1:40 1:43 1:46 1:49 1:52 1:55 1:58 2:01 2:04 2:07 2:10 2:13 2:16 2:19 2:22 2:25 2:28 2:31 2:34 Annex -3 Training Materials (9)

Presentation Material for Public Seminar Held on 15th October, 2012

6. Reduction of Real Losses (Leakage)

Pinpointing Survey Confirmation Survey

Back Back Annex -3 Training Materials (9)

Presentation Material for Public Seminar Held on 15th October, 2012

7. PR Activities

 To educate the future generation

 To make them a part of this project

 To send the message to their homes

cd;sl c, iïmdok y d c,dmjyk uKav, h National Water Supply & Drainage Board Regional Support Centre (Western – Central)

Activity 01

 5 schools - within the pilot area.  5 schools - outside the pilot area

5 schools from the pilot area. 01. C. W. W. KannagaraMaha Vidyalaya- Borella 02. Ratnaweli Balika Vidyalaya - Borella We made aware the school children on Non Revenue Water reduction 03. Carey College - Borella 04. YashodharaBalikaVidyalaya - Borella with the support of Principals & Art Teachers of the respective schools 05. Wesley College - Kotahena

5 schools from outside the pilot area.

01. Rajasinghe Maha Vidyalaya - Dematagoda 02. St. Anthonies Balika Vidyalaya - Dematagoda 03. St Mathews Vidyalaya - Dematagoda 04. Gothami Balika Maha Vidyalaya - Maradana 05. Anurudda Balika Vidyalaya - Dematagoda Annex -3 Training Materials (9)

Presentation Material for Public Seminar Held on 15th October, 2012

7. PR Activities

JICA provided valuable drawing-kits for all students participated

 Awareness on water conservation Judges from the University of  Knowledge on Reduction of Non Revenue Water Kelaniya selected the winners.

 Participatory Certificates & Drawing -kits.  Special Certificates & gifts for winners.

3rd Place 2nd Place 1st Place

Chansu Vimukthi of Carey College Anupa Gunawardena of WesleyCollege S. K. Sadini Mekela of Ratnawali Balika Maha Vidyalaya Annex -3 Training Materials (9)

Presentation Material for Public Seminar Held on 15th October, 2012

7. PR Activities

Activity 02 We selected five schools in Colombo.

 S. W. R. D. Bandaranayaka Vidyalaya - Borella  St. Benadict’s College - Kotahena

Ratnawali Balika Vidyalaya - Borella St. Mathew’s College - Dematagoda

Awareness Programs conducted in Relation to;.

 Water Purification / Cost of water/ Water conservation St. Anthony’s Balika Vidyalaya - Dematagoda for the future and Non Revenue Water issues. Annex -3 Training Materials (9)

Presentation Material for Public Seminar Held on 15th October, 2012

7. PR Activities

 All the participants were given the opportunity to create drawings on given themes.

 Drawing materials were provided by JICA Achivements

We allowed the children to come out with their own ideas.  Knowledge given to children.

 We got the opportunity to send the good message to their homes & schoolmates.

 Opportunity to display the winning posters in public places & schools with a message from the Water Board & JICA.

Thank you.

Presented by; Shiromi Karunarathne Senior Corporate Communication Officer Regional Support Center (Western - Central) Annex -3 Training Materials (9)

Presentation Material for Public Seminar Held on 15th October, 2012

8. Recommended Action Plan

Summary of Activities to be executed Item Contents Description

1. Unbilled Authorized Community formation Enhance the current activities Consumption (Free Water Outlets)

2. Unauthorized Investigation Improve random base checking by using customer data Consumption 3. Metering Error Education to Meter Revision of the tasks and training ＲｅｃｏｍｍｅｎｄｅｄＡｃｔｉｏｎＰｌａｎ readers 4. Real Losses Leakage Detection Continuation of the pilot activities with some modification Leakage Repair / Continuation of the pilot activities with some modification Recording Bundle pipe replacement Replacement of bundle pipe by using / following the manual. Storage tanks/ sumps List up and measure water loss volume to make clear the seriousness of the problem.

5. GIS for O&M Preparation Continuation of the pilot activities with some modification Usage Usage of GIS especially by O&M field staff 6. PR activities Improvement of current Introduction of new idea such as school curriculum and manual activities for notification of water suspension.

7. Water Act Study required Recommendation on amendment such as improvement of Amendment illegal connections

Recommended Urgent Action Plan Acti ons re qui red Orga nisa ti on resp onsi ble 20012 2013 2014 2015 101112123456789101112123456789101112123456789101112 1) Leakage Detection Trai nin ig a nd Sup ervisio n NWSD B (NRW+ OM) & Exte rnal Consultants Se t up of Leak De tec ti on Te ams and NWSD B(NRW) & trai ni ng Exte rnal C onsultants Pr ocu rement of Tools/ Equ ipmen t NWSD B & Exte rnal C onsultants L eak De tec ti on ZO area 1 NWSD B(NRW, OM) & Contractors & L eak De tec ti on ZO area 2

L eak De tec ti on ZO area 3

2) Leakage Repair / Recording S et up Leaka ge Rec ord System NWSD B (OIC Offi ce) & Exte rnal C onsultants Pr ocu rement of Tools/ Equ ipmen t NWSD B (NRW, OM) & Exte rnal Consultants L eaka ge Repa ir NWSD B (OIC o ffi ce) If NWSDB propose assistance for the 3) Bundle Pipe Replacement Trai nin ig (Man nua l metho ds) NWSD B(OIC ) & Exte rnal Consultants Exec uti on of Bun dle pi pe r eplac ement / NWSDB(OIC Office) & Su per vi si on C ontractor 4) Storage Tank / Sumps Collection of Information NWSDB (OM) & execution of the Action Plan, ……………. Exte rnal Consultants In stalla ti on of mete rs and c ompari son wi th NWSDB (OM) & customer data Exte rnal C onsultants

Acti ons re qui red Orga nisa ti on resp onsi ble 20012 2013 2014 2015 101112123456789101112123456789101112123456789101112 5) GIS Preparation Up datin g of exi siting Base Map / Fi eld D ata NWSD B(OM, NRW) & C olle cti on (Smal l roads usi ng GPS) Exte rnal C onsultants Fi eld Da ta C ollec ti on (C usto mer Data w/o GPS) F i eld Da ta C ollec ti on (O the rs with GPS)

Data Input (Customer data and others)

Pr epa rati on o f Fie ld Datab ase

Pr ocu rement of Tools/ Equ ipmen t

Up datin g of GIS NWSD B (Malig akand a)

Training of GIS Usage NWSDB (O&M) & Exte rnal C onsultants

Acti ons re qui red Orga nisa ti on resp onsi ble 20012 2013 2014 2015 101112123456789101112123456789101112123456789101112 6) Unbilled Authorized C ommuni ty cr eation fo r stan dpost NWSD B & NGO 7) Unauthorized Connection C ustomer Survey NWSD B(Meter rea der) & Exter nal Co nsultants Se lectio n of hou se to be su rveyed NWSD B (NRW uni t) & Exte rnal C onsultants Ille gal c onne cti on sur vey & Lega lizatio n NWSD (NRW uni t)

8) PR activities Up gra din g PR activiti es NWSD B & Exte rnal C onsultants 9) Training to Meter Readers Revision of tasks and training to Meter NWSDB & Re ade rs Exte rnal Consultants 10) Amendment of Water Act Re commend ati on o n the amendmen t NWSD B & Exte rnal C onsultants