lesson learnt from selangor experience hj mohd yunus - syabas.pdf · introduction syarikat bekalan...

THE MALAYSIAN WATER ASSOCIATION Borneo Water & Wastewater Exhibition & Conference (BWWE) 2015

In Conjuction With 28th Annual Meeting of District Water Engineers Committee (JTJAD) 14 – 16 December 2015, Borneo Convention Centre Kuching, Sarawak

“ LESSON LEARNT FROM SELANGOR EXPERIENCE ”

SPEAKER :

MOHD YUNUS BIN OTHMAN

(PENGURUSAN AIR SELANGOR SDN BHD/JTJAD)

INTRODUCTION

Syarikat Bekalan Air Selangor Sdn. Bhd. (SYABAS - wholly owned company by Pengurusan Air Selangor Sdn Bhd – 15 October 2015)

Total numbers of consumer connections 2.053 million serving about 10 million consumers in Selangor, Kuala Lumpur and Putrajaya.

There are 34 numbers of water treatment plants

Current daily average production in 2015 - 4706MLD (December);

7 dams supporting the daily productions.

The distribution network to consumers comprised of piping system of more than 27,000 km

10 water districts.

10 WATER DISTRICTS IN SELANGOR

SUPPLY AND DEMAND

4000

4500

5000

5500

6000

6500

7000

Jan-15 Mar-15

May-15

Jul-15

Sep-15 Nov-15

Jan-16 Mar-16

May-16

Jul-16

Sep-16 Nov-16

Jan-17 Mar-17

May-17

Jul-17

Sep-17 Nov-17

Jan-18 Mar-18

May-18

Jul-18

Sep-18 Nov-18

Jan-19 Mar-19

May-19

Jul-19

Sep-19 Nov-19

Jan-20 Mar-20

May-20

Jul-20

Sep-20 Nov-20

Jan-21 Mar-21

May-21

Jul-21

Sep-21 Nov-21

Permintaan Air/Kapasiti Bekalan (JLH)

PROJECTED SUPPLY AND DEMAND

Unjuran Permintaan Air Kapasiti Bekalan Permintaan Sebenar 10% Rizab

Kapasiti Boleh

Agih = 4721 JLH

(Dec 2015)

Kapasiti Boleh Agih =

6971 JLH (Dec 2020)

PETUNJUK:

A - SSP1 dan SSP3 (215JLH) B - Pemindahan Air dari Ngoi - Ngoi (60JLH) C - Menaiktaraf Loji langat 1 Fasa 1 (28JLH) D - Langat 2 Peringkat 1 (325 JLH)

Semenyih 2 Fasa 1 (50JLH) E - Semenyih 2 Fasa 2 (50JLH)

Labohan Dagang (200JLH) F - Langat 2 Fasa 1 Peringkat 2 (805 JLH) G - Loji Langat 2 fasa 2 ( 760 JLH)

A

D

G

C

Kapasiti Boleh

Agih = 5076 JLH

(Sep 2016)


5048 JLH (Mac 2016)

B


5451 JLH (Jun 2017)


5701 JLH (Dec 2017)

E


6211 JLH (Jan 2019)

F

PROJECTED SUPPLY AND DEMAND

Table 1: The projected supply and demand for treated water in Selangor from 2015 until 2020

BACKGROUND Water sector in Selangor had going

through crisis period starting in February until end of April 2014 due to the impact of long hot and dry weather as well as raw water pollution issues.

To control further reduction in Sungai Selangor, Sungai Tinggi, Klang Gates and Langat dams level, the State Government through it operator Puncak Niaga (M) Sdn Bhd (PNSB) had requested SPAN approval to reduce the daily discharged from these dams and consequently reducing the daily production from the water treatment plants.

SYABAS was instructed by the State Government to propose rationing plan for SPAN approval in line with the reduction on daily discharged from these dams.

Picture 1: Actual condition of Sungai Selangor right after the intake of Water Treatment Plants (barrage)

RATIONING PLANS

Rationing Plan no 1 - Due to raw water pollution and shut down of Bukit Tampoi and Cheras Batu 11 water treatment plants;

Rationing Plan no 2 - Due to reduction in raw water released from Sungai Selangor Dam amounting to 200 MLD;

Rationing Plan no 3 - Due to reduction in raw water released from Sungai Selangor Dam amounting to 500 MLD; and

Rationing Plan no 4 - Due to reduction in raw water released from in Sungai Selangor Dam amounting to 1,000 MLD.

BASIS FOR RATIONING PLAN

Affected demand areas tree times bigger than the reduction in production capacity;

Dividing the affected supply areas into 2 zones; Adopting 2 day supply and 2 day interruption schedule; Identification of isolation valves to be operated; Identification of affected reservoirs; Identification of critical consumers which need to be exempted from the rationing

plan; Manpower planning to manage and operate the valves; Supporting equipment and logistics for supplying water to the affected areas

through water tankers and static tanks; Prepared for immediate repair on pipe burst cases during rationing program; Monitoring the recovery of water supply to the attended zones and water cut; Reporting on the saving.

RATIONING PLAN POLICY

Water tankers will not be sent to affected consumers on scheduled interruption; Water tankers will only be sent to affected consumers on scheduled to have water

supply; Static water tank will be placed at critical areas (as approved by SPAN) and the

areas which are expected to face late recovery; Water supply through water tankers will also be send out to critical consumers

which are having death in the family, wedding ceremony, religious institutions, dialysis center, hospitals, old folks shelter and others as approved by SPAN regardless of the rationing schedule;

Extended supply schedule for an area facing pipe burst case; It is also expected that about 10% of the consumers on schedule supply area will be

getting supply late due to the distance and the topography factors; Water supply through water tanker is for domestic used only; For commercials and industrial consumers, they have to used their own water

tankers to buy water for commercial and industrial use;

RATIONING IMPLEMENTATION PLAN

Rationing Plan Due to Raw Water Pollution – Sg. Langat

High concentrations of ammonia causes raw water quality failed to meet the standard requirement set by the Ministry of Health, with ammonia content way above 1.5 ppm.

National Water Commission (SPAN) has granted approval to the State Government and PNSB as the water treatment plant operator for Cheras Batu 11 and Bukit Tampoi, to temporarily shut down its operation starting from January 28, 2014 following high ammonia content in the raw water.

As a result of the temporary closure of both WTP’s, there was a reduction on the available treated water by 56 MLD for distribution which affected some areas in Hulu Langat and Kuala Langat.

The 56 MLD shortage of treated water was based on normal production of 21 MLD from Cheras Batu 11 WTP and 35MLD from Bukit Tampoi WTP.

RATIONING IMPLEMENTATION PLAN Rationing Plan Due to Raw Water Pollution – Sg. Langat (cont.)

0.00

1.00

2.00

3.00

4.00

5.00

6.00

7.00

8.00

9.00

8:00

AM

10:0

0 A

M

12:0

0 P

M

2:00

PM

4:00

PM

6:00

PM

8:00

PM

10:0

0 P

M

12:0

0 A

M

2:00

AM

4:00

AM

6:00

AM

8:00

AM

10:0

0 A

M

12:0

0 P

M

2:00

PM

4:00

PM

6:00

PM

8:00

PM

10:0

0 P

M

12:0

0 A

M

2:00

AM

4:00

AM

6:00

AM

8:00

AM

10:0

0 A

M

12:0

0 P

M

2:00

PM

4:00

PM

6:00

PM

8:00

PM

10:0

0 P

M

12:0

0 A

M

2:00

AM

4:00

AM

6:00

AM

8:00

AM

10:0

0 A

M

12:0

0 P

M

2:00

PM

4:00

PM

6:00

PM

8:00

PM

10:0

0 P

M

12:0

0 A

M

2:00

AM

4:00

AM

6:00

AM

8:00

AM

29.1.2014 30.1.2014 31.1.2014 1.2.2014 2.2.2014

Bacaan MOH Std.

Graph 2. The graph above shows the concentration of ammonia in the raw water at Cheras Batu 11 intake from 29 January 2014 until 2 February 2014 with maximum concentration of 8.3 ppm .


0.00

1.00

2.00

3.00

4.00

5.00

6.00

7.00

8.00

8:00

AM

10:0

0 A

M

12:0

0 P

M

2:00

PM

4:00

PM

6:00

PM

8:00

PM

10:0

0 P

M

12:0

0 A

M

2:00

AM

4:00

AM

6:00

AM

8:00

AM

10:0

0 A

M

12:0

0 P

M

2:00

PM

4:00

PM

6:00

PM

8:00

PM

10:0

0 P

M

12:0

0 A

M

2:00

AM

4:00

AM

6:00

AM

8:00

AM

10:0

0 A

M

12:0

0 P

M

2:00

PM

4:00

PM

6:00

PM

8:00

PM

10:0

0 P

M

12:0

0 A

M

2:00

AM

4:00

AM

6:00

AM

8:00

AM

10:0

0 A

M

12:0

0 P

M

2:00

PM

4:00

PM

6:00

PM

8:00

PM

10:0

0 P

M

12:0

0 A

M

2:00

AM

4:00

AM

6:00

AM

8:00

AM

29.1.2014 30.1.2014 31.1.2014 1.2.2014 2.2.2014

Par

as A

mm

on

ia (

pp

m)

Bacaan Ammonia MOH Std.

Graph 3. The graph above shows the concentration of ammonia in the raw water at Bukit Tampoi intake from 29 January 2014 until 2 February 2014.

STARTING

DATE DISTRICT

NO

ACCOUNT

TOTAL NO

OF HOUSES

DEMAND

MLD

VALVE SIZE AND NO

(mm) NO OF STAFF

REQUIRED

TOTAL

AFFECTED

AREAS <450 >450

27/02/2014

Hulu

Langat

15,262 19,167

42

5 2

27

17

13,481 21,278 5 2 22

Kuala

Langat 8,573 9,867 20 3 3 19

Sepang 9,867 9,873 14 - 2 13

SUB TOTAL 13 9

TOTAL 47,183 60,185 76 22 27 71


Table 2: Details rationing plan for Cheras Batu 11 and Bukit Tampoi WTPs shutdow


Due to Raw Water Shortage

Sungai Selangor and Sungai Tinggi Dams are the two main sources of raw water supporting Sungai Selangor base flow which is used by 5 water treatment plants as their intakes. The normal release capacities from these two dams are 1,200 MLD and 1,000MLD.

The 5 WTP’s combined daily production capacity of 2,879MLD or about 61.5% from the total daily treated water production (demand) for the whole state of Selangor, Kuala Lumpur and Putrajaya.

During the hot and dry session, Sungai Selangor Dam levels keeps on reducing from 70% in January until it reached the lowest level of 36.4% at March 30, 2014. Lembaga Urus Air Selangor (LUAS) which is the responsible authority for managing raw water in Selangor had issued a strict control measure on the released from these 2 dams as well as Klang Gates Dam to ensure the raw water supply can last until the next monsoon season.

Even with the strict control, the Sungai Selangor dam levels keep on reducing day after day until it reaches almost critical level of 30%.

The Authority decision on controlling released of raw water from Sg. Tinggi and Sg. Selangor dams had affected the capability of five water treatment plants which source their raw water from Sungai Selangor. Accordingly, the WTP’s had to reduce their daily production of treated water and supply to consumers.


Rationing Plan Due to Raw Water Shortage (cont.)

DAM MAXIMUM LEVEL

ODL (m)

CURRENT LEVEL

ODL (m)

WATER STORAGE

(MG) (%)

Sungai Selangor 220.00 189.50 18,412.00 36.39

Sungai Tinggi 59.50 53.14 15,574.44 61.84

Sungai Semenyih 111.00 106.03 9,308.00 71.63

Sungai Langat 220.96 211.34 3,676.50 49.02

Klang Gates 95.22 89.45 2,808.30 50.39

Tasik Subang 38.56 37.70 806.97 87.24

Sungai Batu 102.70 99.33 5,186.20 77.35

Table 3: Dams level as at 30 March 2014

RATIONING IMPLEMENTATION PLAN Rationing Plan Due to Raw Water Shortage (cont.)

0.00

5.00

10.00

15.00

20.00

25.00

30.00

35.00

40.00

45.00

50.00

180.00

190.00

200.00

210.00

220.00

230.00

Tab

uran

Huj

an (

mm

)

Par

as E

mpa

ngan

( m

)

Tarikh

Graph 4. Sungai Selangor Dam level from 1 January until 31 May 2014

RATIONING IMPLEMENTATION PLAN Rationing Plan Due to Raw Water Shortage (cont.)

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

80.00

40.00

45.00

50.00

55.00

60.00

65.00

Tab

ura

n H

uja

n (

mm

)

Par

as E

mp

ang

an (

m )

Tarikh

Graph 5. Sungai Tinggi Dam level from 1 January until 31 May 2014

RATIONING PLAN No. 2

In line with SPAN approval for the reduction of 200MLD raw water released from Sungai Selangor Dam, the State Government and SYABAS proposal for the activation of rationing plan was also approved starting from 2 March 2014.

An estimated 613MLD supply areas had been included under the rationing plan which involving areas from Hulu Selangor, Kuala Selangor, Petaling, Gombak, Kuala Lumpur and Klang.

The total numbers of consumer connections affected was 315,817 or 354,883 premises.

RATIONING PLAN No. 2 (cont.)

NO. DISTRICT AFFECTED RESERVOIR NOS. ACCOUNT NOS. OF PREMISES TOTAL DEMAND (MLD)

1 Klang

HICOM 15,734 16,520

82.43 Lam Bee 10,339 10,363

Lipat Kajang 18,056 18,499

2 Petaling Bukit Gasing 49,555 57,050

160.63 Effingham 21,514 21,514

3 Kuala Lumpur Batu Estate 20,613 22,229

80 Pam Wangsa Maju 30,810 48,529

4 Gombak

Dusun Kubung

(wangsa maju) 21,207 22,106

50

Kepong Estate Lama 15,991 17,377

5 Hulu Selangor Sistem Rasa & Line Kuang 79,625 88,322 185

6 Kuala Selangor Rantau Panjang 15,314 15,314

55 SSP 2 17,060 17,060

TOTAL 315,817 354,883 613.06

Table 4: The affected areas, key reservoirs, numbers of consumers account and daily demand affected by the rationing plan no 2


With the implementation of rationing plan no 2, Sungai Selangor Dam storage level keep on reducing at the rate of about 0.5% per day. LUAS was compelled to further control released from this dam by increasing the quantity of reduction to 500MLD.

A new proposal on reduction of released from Sungai Selangor Dam and rationing plan no 3 was submitted to SPAN and approved for implementation on 10 March 2014.


STARTING

DATE DISTRICT

NO OF

ACCOUNT

NO OF

PREMISE

DEMAND

(MLD)

VALVE (SIZE)

NO OF STAFF REQ

NO OF

AFFECTED

AREAS <450 >450

10/03/2014

Hulu Selangor 79,625 88,322 185 42 15

299

(Inclusive of RP-2)

53

Kuala Selangor 32,071 33,068 55 14 6 126

Petaling 194,072 231,267 393 85 19 144

Gombak 127,583 133,896 276 38 19 130

Kuala Lumpur 70,940 100,977 190 19 21 111

Klang 131,190 134,502 335 16 48 24

Sub-Total 214 128

TOTAL 635,481 722,032 1,434 342 299 588



• After about 2 weeks implementing rationing plan no 3, there was no significant improvement in Sungai Selangor Dam level, instead the level kept on dropping with slower rate.

• Rationing plan no 4 was prepared in addition to the existing rationing plan no 3. However, the schedule of interruption to consumer was arranged in a way that no additional manpower or vehicles required;

• Under rationing plan no 4, SYABAS had selected additional areas with about 1127MLD total demand. Since the distribution area for Sungai Selangor scheme was not enough to cater for the required area, we had extended the rationing plan area, covered under Sungai Semenyih supply.

• SYABAS had also implemented rationing plan 4 with assistance from Economic Planning Units of Selangor (EPU) and Local Authorities which had provided help in additional manpower as well as operational vehicles for daily valves operation.


STARTING

DATE DISTRICT

NO

ACCOUNT

NO OF

PREMISES

DEMAND

(MLD)

VALVE (SIZE) NO STAFF

REQUIRED

NO AFFCETED

AREA <450 >450

04/042014

Kuala Selangor 18,969 19,369 34.13 12 4

377 - SYABAS

98 - PBT

87

Petaling 170,577 195,085 433.78 111 22 129

Gombak 63,234 67,565 126 54 9 88

Kuala Lumpur 3,006 56,536 120 15 1 75

Klang 140,519 142,301 294.78 75 17 76

Hulu Langat 117,280 137,075 114.08 95 11 187 Kuala Langat 8,302 8,302 4.98 - 5

11 SUB-TOTAL 362 69

TOTAL 521,887 626,233 1127.75 431 475 653


OPERATIONAL PROBLEM NO PROBLEM ACTION TAKEN

1 We had recorded increase in pipe burst cases during rationing, especially at area with old and weak pipe system. This had delayed the supply to consumer based on rationing schedule.

Pipe repair was done immediately, and extended supply period to the affected area

2 Air lock within the piping system during supply period.

Manual flushing; Introduce additional air valve along the pipe line for faster recovery;

3 Late recovery for Apartments or high rise building, due to the internal supply was used during rationing schedule of no water.

Coordinate and get Joint Management Body cooperation to strictly following the rationing schedule.

4 Vandalism and case of water theft along SYABAS main pipe line.

Reporting to the authority, informing the consumers that they will get water supply as schedule and they need to store enough water during no water rationing period.

5 Interruption to the water supply system Interruption due to TNB supply cut off or temporary tripping at pump houses; WTP shut down.

ACHIEVEMENTS

In the implementation of rationing program, SYABAS had recorded all information related to the shutting down the supply, recovery period, confirmation on the affected areas, valves operation and consumers feedback.

This was done to enable SYABAS to make the necessary adjustment in the

implementation of rationing program, to ensure that the consumers schedule of interruptions are being followed accordingly.

LESSSON LEARNT

Managing water crisis through well plan rationing plan is much easier than handling normal relief water through water tankers and static tanks;

Managing consumers complaint through the implementation of rationing plan is very much less compared to the normal water interruptions;

Weather change can cause serious water crisis, and a proper plan needed to face such crisis;

Even with a successful rationing plan, the damaged to the consumers confidence, losses to industries and for future growth of the State, water crisis need to be avoided;

Consolidated effort by the Authorities in ensuring adequate raw water sources and pollution issues need to be address efficiently for continuous safe treated water supply;

Water infrastructure need to be develop to cope with the socio and economic development of the State;

lesson learnt from selangor experience hj mohd yunus - syabas.pdf · introduction syarikat bekalan...

Documents