©wrc plc 2014 - future water association©wrc plc 2014 • framework requires input data relating...

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Economics of supply pipe leakage

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• Background to a focus on supply pipes• Current UKWIR study – leakage• Broadening perspective – holistic management• Conclusions

OverviewOverview

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WRc Economics of supply pipe leakage

Issues regarding the potential

adoption of supply pipes: costs,

customer service and regulatory

impacts(simple cases)

Service pipe manual

Atkins report for Defra consultation

UKWIR study on impact of lead in

brass

UKWIR Economics of customer side

leakage

WRc CP537 – Supply pipe

management strategies

BackgroundBackground

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UKWIR studyUKWIR study

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• Framework requires input data relating to:– Interventions– Properties and metering– Leakage– Monitoring and location costs– Customer contacts– Intervention costs– Cost of water– Externalities– Shared services

Current situationCurrent situation

• Current situation outputs• Ability to model impact of

change to the current situation based on changing the SPL policy

• Ability to look at the impact of ‘specific issues’ – metering, waste notices, adoption and supply separation.

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• SPL policy is defined within the work using two key variables:

SPL policy definitionSPL policy definition

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• Run time impact (from identification to fix)

• Cost impact

• Unwanted customer contact impact (for households)

Three key relationshipsThree key relationships

Fix time ReinstatementTime

Awareness time

Leak break out Leak identified

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• Waste notices

• Metering

• Supply separation

• Supply adoption

ScenariosScenarios

Leak run time

Operating cost

Customer contact

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• SELL integration module:– Framework selection– Cost elements to consider– SR/LR assessment– Sensitivity of policy

Optimum situationOptimum situation

• Identify the least cost supply pipe leakage policy based on current and scenario information

• Visualise the variability in cost and leakage level that different SPL policies have

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• Prevalence of different supply pipe arrangements – what are the management costs of each?

A step furtherA step further

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