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WSD ANNUAL REPORT 2003-2004 45

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Enhancing efficiencySteps being taken to improveoperational efficiency in line withproposals made by a workinggroup drawn from managementand staff will result in furthersavings of 2.8 per cent ofoperating expenditure for thecoming year.

These savings, added to an originaltarget of one per cent, bring thetotal to 3.8 per cent, or $110million for the 2004/05 year, andwill be achieved largely throughoverall streamlining of work,combining efforts for excellence inall aspects of service with cost-savings targets. The endorsedproposals are being introduced inphases under a revised OperatingExpenditure Envelope – OEE.

The proposals were among some40 initiatives raised by the Working

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Using advanced pipe locator for active leakage detection.

Group on the Review of theOrganisational Structure andEfficiency – ROSE.

Meanwhile, savings of 8 to 17 percent in total operational staffstrength in treatment works aswell as manned pumping stationswere achieved from the OptimalUtilization of Resources study –OUR – started in 2000.

Automation benefitsAdding to productivity benefitshas been the wider use ofautomation under the SupervisoryControl and Data Acquisition(SCADA) system for remotemonitoring and control ofinstallations in the water supplynetwork covering water treatmentworks, pumping stations andservice reservoirs.

By enabling unmanned operationswith the further aid of Remote VideoSurveillance System (RVSS) and thesetting up of mobile inspectionteams, significant manpower savingswere brought about especially inpumping stations.

An information system has alsobeen developed under SCADA toallow office staff to access theoperational data via the corporatecomputer network for on-linemonitoring, resources planningand data analyses to improveoperational efficiency.

IT planThe first stage of an InformationSystem Strategy Plan, dealing withcustomer care and billing isscheduled to commence roll-outlater in 2004. Contracts have beenawarded for the second and third

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�� !"#$%&'()*+,�-./01Statistics on Mains Bursts Repaired (By Types of Water Supply)

�� Year

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03/04

02/03

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98/99

97/98

96/97

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94/95

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707769

859 707

453

1,884

1,932

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1,476

1,566

1,315

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1,028

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stages dealing with laboratoryinformation management, datainfrastructure and maintenanceworks. These are due forcompletion by 2006. A plan for thefourth stage is being drawn up.

Care of assetsA great deal of work is involved inkeeping the surface andunderground assets — comprisingmains, valves and cables — in

good condition for the smoothflow of the water supply. Includedin surface assets are such things asimpounding and service reservoirs,water treatment works, pumpingstations, tunnels and buildings.

A Surface Assets Register and aManagement Plan will be put intooperation by the end of 2004.Together with this, a 20-year planwill be developed for replacementof surface assets.

By the use of a computerizedDigital Mapping System formanaging the record of assets, therisk of damage caused byexcavation work is greatly reduced.Starting from 2002, thissophisticated mapping system hasbeen enhanced such that assetrecords can now be exchangedinstantly by computers with utilityundertakers and other governmentdepartments that engage inexcavation and construction work.

�� !"#$%&'()*+,-./01Statistics on Mains Bursts Repaired (By Regions)

�� !"#$%&'()*+,-*+./0123No. of (F.W. & S.W.) Mains Bursts Repaired by Term Contractors

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Financial Year HK & I (No.) NTE (No.) NTW (No.) K (No.) Total (No.)

1994/95 243 148 244 359 994

1995/96 334 170 382 429 1,315

1996/97 358 154 451 603 1,566

1997/98 323 168 402 583 1,476

1998/99 394 336 462 758 1,950

1999/00 564 297 429 531 1,821

2000/01 583 306 388 655 1,932

2001/02 545 325 397 617 1,884

2002/03 496 277 319 598 1,690

2003/04 513 507 323 608 1,951

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On a broader scale, it will also helpenhance efficiency of dailyoperations and delivery ofcustomer services.

With the completion during theyear of work on the replacementof the pumping plant for SandyBay Fresh Water Pumping Stationand Quarry Bay Salt WaterPumping Station, work iscontinuing on replacement ofpumping plants for 28 installationsto improve energy efficiency. Workis also being carried out on theprogrammed maintenance andrenovation of civil structures,including service reservoirs, slopesand access roads.

In other areas of work, repair ormaintenance of some 58 000 itemsof mechanical, electrical and

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�� !"#$%&'Performing remote monitoring and control of plantoperation through SCADA system in the control room of awater treatment works.

instrumentation equipment wascarried out and nearly 1 500 safetyinspections were conduced atimpounding, service and irrigationreservoirs, and some 6 000 slopesin WSD’s care.

Main burstsResulting from an activereplacement and maintenanceprogramme for water mains, westrive to decrease the number ofmain bursts in the years to come.More effective procedures in usehave also helped reduce the timetaken for isolating main bursts andrestoring supply interruptions.

Leakage controlAdoption of the latest technologiesin proactive leak detection and

pressure management has helpedreduce water loss through mainsleakage. Leakage managementstrategy includes the use ofadvanced flow-modulated pressurereducing valves and continuousmonitoring of the water supplynetwork. For greater efficiency, apart of the in-house leak detectionworks has been included in thecurrent and future term contractsfor civil maintenance work.

Bulk metersIn the effort to reduceunaccounted-for water, aprogramme is being carried out touse bulk meters in large housingestates and some New Territoriesvillages to monitor waterconsumption.

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�� 2003-2004 ��52

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��Fresh Water

�� !"#$%&'()*Tests Conducted Per Financial Year 1995/96 1996/97 1997/98 1998/99 1999/00 2000/01 2001/02 2002/03 2003/04

�� !"#$%&'No. of Minimum Night Flow Tests 411 396 410 443 495 487 431 334 320

�� !"#$%No. of Step Tests (or Leakage Tests) 72 69 72 77 46 43 15 55 70

�� !"#$%No. of Day Flow Tests 65 88 100 124 200 217 223 845 1361

�� !"#No. of Sounding & Visual Inspections 1,975 3,423 3,545 4,169 4,045 4,438 3,853 3,247 3,286

�� !"#$%&Total No. of Tests & Inspections 2,523 3,976 4,127 4,813 4,786 5,185 4,522 4,481 5,037

�� !"#$%&'No. of Leaks Detected 1,910 2,829 3,287 4,868 5,353 5,714 5,054 3,825 3,651

�� !"#$%&'()*+,-Estimated Quantity of Fresh Water

Saved (cu.m/day) 193,826 209,820 203,998 249,615 254,623 290,940 231,161 178,433 91,993

��Sea Water

�� !"#$%&'()*Tests Conducted Per Financial Year 1995/96 1996/97 1997/98 1998/99 1999/00 2000/01 2001/02 2002/03 2003/04

�� !"#$%&'No. of Minimum Night Flow Tests 6 19 23 3 6 5 0 0 0

�� !"#$%No. of Step Tests (or Leakage Tests) 0 1 1 0 0 1 4 11 8

�� !"#$%No. of Day Flow Tests 3 4 11 10 20 23 14 31 48

�� !"#No. of Sounding & Visual Inspections 208 177 211 171 284 312 319 376 557

�� !"#$%&Total No. of Tests & Inspections 217 201 246 184 310 341 337 418 613

�� !"#$%&'No. of Leaks Detected 66 127 156 208 216 254 191 197 219

�� !"#$%&'()*+,-Estimated Quantity of Sea Water

Saved (cu.m/day) 10,416 14,511 11,543 23,430 25,532 41,895 25,805 26,993 12,598

�� ! ResourcefulOutput


Research & DevelopmentInformation derived from therecent installation of an ultra-filtration plant at Ngau Tam MeiWater Treatment Works will beused in designing new works ormodernising existing facilities.

Meanwhile, results of test carriedout during the year have shownthe effectiveness of remotelycontrolled cleaners in removing thedeposit in service reservoirs so as toavoid having to drain them downfor cleaning.

A pilot scheme using inclined tubetechnology to improve theefficiency of the water treatmentprocess has been successfullycarried out at Sha Tin WaterTreatment Works, increasing thethroughput by more than 20 percent and also greatly improvingwater quality.

The new technology will be appliedto other clarifiers at the Sha Tinand Tuen Mun Water TreatmentWorks as well.

Quality planThe site maintenance function ofthe Mechanical and ElectricalMaintenance Division has achievedISO 9001:2000 certification, in linewith our Quality Assurance Plan.

At the same time migration fromISO 9000:1994 to the 2000 versionwas successfully effected for the

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consultants management, designand construction functions.

Crisis controlFor crisis control, a plan has beenput in place to speed up responseto any emergency. It sets out clear

descriptions of emergencysituations, thereby facilitating rapidmobilization of resources andco-ordinated action to be taken todeal with any system failure ormajor event.

resourceful output

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