d3 haiphong

8/6/2019 D3 Haiphong

http://slidepdf.com/reader/full/d3-haiphong 1/22

1

The views expressed in this paper/presentation are the views of the author and

do not necessarily reflect the views or policies of the Asian Development Bank

(ADB), or its Board of Governors, or the governments they represent. ADB does

not guarantee the accuracy of the data included in this paper and accepts no

responsibility for any consequence of their use. Terminology used may not

necessarily be consistent with ADB official terms.



2

HAIPHONG WATERSUPPLY ONE MEMBER

LTD. COMPANY

HOW TO SUSTAIN THE NRWMANAGEMENT STRATEGY



3

Overview – NRW have been reduced

year by year

– Bold NRW reduction strategy implemented byHP water utility

– Two internationally loaned projects for water

service improvement in the past ten years – Significant successes

– 100% metered consumption

– After significant gains, NRW was rising againin old network ( rehabilitated 1994-1997)

– One of the company has the lowest NRW in

Viet Nam

0

10

20

30

40

50

0 01 02 03 04 05 06 07 08 09

year

planned achieved



4

Haiphong city’s context

– 7 urban districts and 7 rural areas.

– 1.8 million people. – An industrial-commercial city

– Rapid urbanization in past 5 years

– Mixed pipes network

– Hydrogeology: alkaline soil

– >450.000 USD for 1% of NRW reduction inperiod of 2003-2008



5

Some statistics

• Supplies 215.000 domestic, commercial and industrial

customers ( 69% of the total is for domestic use and 21%for other uses)

• Serves 920.000 inhabitants

• Employee: 1015

• Service coverage of 90%

• 7 served areas

• one DBL model

• one water supply joint-stock company

category of use

other

uses

31%

domesticuse

69%



6

§ I T H

¸ I B × N H

Mixed network

NRW 16,6%

5/35 wards need torehabilitate in 2009

Old network; NRW

22,7%

Finished on May 2009

Expected NRW 20.7%

New networkNRW 6.6%

Served areas

New networkNRW 17%



7

Benefits learnt from the1st course

• Establish a water balance more accurately

• Financial Perfomance Indicators: – Volume of NWR in % system input was 21,6 % and

– Value of NWR in % annual operating cost was 23 %

• Technical Perfomance Indicators:

– ILI was 5,1; and

– l/conn./day was 148• NRW self assessmant was B

• More credible action plan for 2009



8

Water balance for 2008

System input

Volume53.473.280

Error margin

+/-0.4%

Authorized

Consumption

42.099.000

+/-0.0

Water loss

11.374.280

+/- 1.8%

Billed Authorized

Consumption

41.888.000

Billed metered consum.

41.888.000

Billed unmetered

Consumption: 0

Unbilled Au.

Consumption

211.000+/-2.5%

Unbill.metered con.

11.000

Unbilled unmete. con.200.000, +/- 5%

Commercial

Losses1.269.312

+/-1%

Unauthorized Consump.

12.228, +/-0.6%Meter inaccuracies &

data handing errors

1.257.084, +/-1%

Physical losses10.104.968

+/- 2%

Revenue water

41.888.000

NRW

11.585.280

+/- 1.8%



9

Noticeable inputs (1)

Meter's

life >=D20 % Total consumption

<=5 913 52,7% 6.854.689

6 - 8 598 34,5% 4.487.415

9-10 222 12,8% 1.664.896

1733 13.007.000

48% (<=5

years old)

41% ( 6 - 8

years old)

11% (8-10

years old)

52% (<=5

years old)35%( 6 - 8

years old )

13% (8-10

years old )

Meter's

life D15 % total consumption

<=5 88504 48% 13.961.280

6 - 8 76172 41% 11.925.260

9-10 19455 11% 3.199.460

184131 29.086.000

Classification according to meter’s life

Meter sizes : 20-100mm, other uses

Classification according to meter’s life

Meter sizes : 15mm, domestic use



10

Noticeable inputs (2)

• Commercial losses almost depends on

meter accuracy• Meter accuracy has relation with meter’s

life. – ≤ 5 years old: +/-1%

– 6-8 years old: - 4 %

– ≥ 9 years old: - 7%



11

Quoted some of goals in 2009

• NRW of the whole city ~ 16,7%

– NRW of rehabilitated DMA≤

10% – Aver. water loss on trunk mains 6,5%

– Quickly react to areas that have NRW over 25%

– Reduce unbilled metered consumption to ≤ 2,5%of total customer

• Proposed water tariff increase

– Critical importance of a comprehensive strategy



12

Revealed different kind of NRW

Whole city

NRW 19,4%

PLPI: 148 l/conn./day

87 % of PL related to leakage ondistribution lines

DBL modelFirst successful DBL model in

viet nam

NRW 17%

CLPI: 90 l/conn./day

95% of losses were commerciallosses related to unauthorizedconsumption’



13

An action plan for physical

loss reduction (1)

• Concentrate to find leaks in high water loss DMA above 20%

• Continue to develope DMA ( restore or install branch valves )

• Network upgrading and renewal

– Replace old galvanized pipes over 12 years old( approx. 50km of pipes )

– Allocated budget: 488.000 USD

• Finish the Kien An water project loaned by WB on time

– Improved water services – Expect to reduce NWR in those areas from 42% to approx. 20%

14,7%16,3% 15,6%

12,9% 12,3%10,7%

10,0%

0

100

200300

400

500

600

2002 2003 2004 2005 2006 2007 2008

year

N o o f b l o c k m e t e r s

0%

5%

10%

15%

20%

N R W

( * )



14

An action plan for physical

loss reduction (2)• Search leakages 20-22 nights

per month

– Aver. 49 leaks/month found

• Analyze weekly readings of

DMA’ flow to

– Analyze any fluctuation

– Quickly react

• Improved accountability on

high NRW.

0

20

40

60

80

5 / 0 8

6 / 0 8

7 / 0 8

8 / 0 8

9 / 0 8

1 0 / 0 8

1 1 / 0 8

1 2 / 0 8

1 / 0 9

2 / 0 9

3 / 0 9

4 / 0 9

5 / 0 9

month

l e

a

k

s



15

An action plan for

commercial loss reduction

• 2,5-3,5% of total customers have been rechecked at random after periodical reading;

– Approx. 4000 customers per month

• Check unbilled metered customers: 2500-3000 customers per month

• Replace 7000 old meters

• Recalibration of 6220 meters• Resize meters for large users ( 35% revenue)

• Allocated budget 190.000 USD

• Clean 33 km of main pipes and flush 1600 km of distribution pipes.

49%

9%

2%

2%

29%

<+5

(-1-5)

(-6-12)

(-13 -26

(-27-54)

(-55-100

Test of 273 WMs after 9

years at 150l/h



16

Why to replace old water meters

Actual meter error curve after

9 years installation

c?p A

Velocity meter

error

Volumetric

meter error

Accepted error

area

60.mp4



17

Meter replacement efficiency

60.mp4

60.mp4

DMA 1 DMA 2

Return of investment achieved within 8 years



18

Exchange experience on

effective NRW managementwith local water utilities

Twinning programe

Water meter calibration



19

Motivative programe

• Set up a monthly target of NRW for some units that concerning tonetwork management

• Over the target: salary decreased

• Below the target: salary increased

• Example: the monthly salary fund for the water meter enterprise iscalculated as follow:

W = actual revenue/ planned revenue x K loss (K loss = actual NRW /

planned NRW)• Set up a quarterly target of NRW for the whole company:• Decrease NRW by 1% as compared to the target, bonus is 2000

USD x 3 months and on the contrary

• Leak detector’s income is more 1,4 times than other

• Leak repairer’s income depends on number of leak repaired



20

Challenges

• Meter stopped with fine sand

– Negligence by contractor – Long existence in distribution network

– One metering point is a flushing point

• Incorporated suburban water plants toHPWSCo

– Poor management skill; – Lack of technically experienced staff;

– High NRW



21



22

d3 haiphong

Documents