Water Research Foundation 4372a

Transcription

1 Water Research Foundation 4372a Real Loss Component Analysis: What s Your Leakage Profile

2 Project Team

3 Downloading the 4372 Materials then search for 4372 or real losses 7

4 The AWWA Water Balance SYSTEM INPUT VOLUME Authorized Consumption Billed Authorized Consumption Unbilled Authorized Consumption Apparent Losses Billed Metered Authorized Consumption Billed Unmetered Authorized Consumption Unbilled Metered Authorized Consumption Unbilled Unmetered Authorized Consumption Consumption Metering Errors Unauthorized Consumption Systematic Data Handling Errors REVENUE WATER NON- REVENUE WATER Water Losses Leakage/Overflow at Reservoirs Real Losses Leakage from Trunk Mains Leakage from Distribution Mains Leakage from Service Connections

5 Water Loss Control Program Next Steps With A Completed AWWA Water Balance: Volume of Apparent Losses Volume of Real Losses Performance Indicators Data Validity Score Remaining Assessments: Understanding of Real Loss Breakdown (where are these losses occurring? what types of leakage?) Evaluation of Cost-Effective Real Loss Intervention Strategies Cost-Effective Non-Revenue Water Reduction Strategies

6 Key Points For Model Development Adoption of AWWA Free Water Audit Software & Importance of Data Validation Contextualized Performance Indicators Break Frequency Research Tools for developing water loss control strategies Location & Response Time Improvement Pressure Management Proactive Leak Detection

7 Component Analysis of Real Losses

8 Real Losses Calculation for Reported & Un-Reported Leakage Annual Real Loss Volume from Reported Leaks = # of leaks by size * average run time * average flow rate (at average system pressure) Leakage Occurrence Pipe Diameter # of Events Flow Rate (gpm) Average Run Time (hrs) Annual Leakage (MG) Mains Breaks Failure Repair Records Estimated based on pipe size using BABE methodology Awareness Time Estimation + Failure Repair Records for Location & Repair Time

9 Component Analysis of Real Losses

10 Contextualized Performance Indicators

11 Break Frequency Research Focus on Predictive Models Terminology Data Collection Completeness

12 Break Frequency Research

13 Leakage Management Strategies Pressure Management Speed and Quality of Repairs Unavoidable Annual Real Losses Economic Level of Real Losses Active Leakage Control Potentially Recoverable Real Losses Current Annual Real Losses Pipeline and Asset Management: Selection, Installation, Maintenance, Renewal, Replacement

14 Proactive Leak Detection Model

15 Pressure Management in the Model

16 Response Time Improvement

17 Summarized Component Analysis WATER AUDIT PERFORMANCE INDICATORS Financial Non-revenue water as percent by volume of water supplied: Non-revenue water as percent by cost of operating system: Annual cost of Apparent Losses: Annual cost of Real Losses: Operational Efficiency Apparent Losses per service connection per day: Real Losses per service connection per day*: Real Losses per length of main per day: er service connection per day per pressure: Unavoidable Annual Real Losses (UARL): Current Annual Real Losses (CARL): Infrastructure Leakage Index (ILI) [CARL/UARL]: 10.3% 3.0% $4,376,956 $1,429, gal/service conn/day 56.0 gal/service conn/day N/A gal/mi/day 0.7 gal/service conn/day/psi 1, MG/Yr 4, MG/Yr 3.0 REAL LOSS COMPONENT ANALYSIS RESULTS System Component Background Leakage Reported Unreported Failures Failures Total (MG) (MG) (MG) (MG) Reservoirs Mains and Appurtenances Service Connections Total Annual Real Loss 1, , Real Losses as Calculated by Water Audit Hidden Losses/Unreported Leakage Currently Running Undetected 4, , AWARNESS, LOCATION AND REPAIR TIME REDUCTION RESULTS Reported Failures Total Potential Savings if Location and Repair Duration is Reduced as Simulated on the A-L-R Times Options Sheet Total Potential Cost Savings if Location and Repair Duration is Reduced as Simulated on the A-L-R Times Options Sheet Unreported Failures (MG) $ 23,458 $ 10,837 Per Year ECONOMIC INTERVENTION FREQUENCY FOR PROACTIVE LEAK DETECTION RESULTS Percentage of the System to be Surveyed per Year 31 % Average Annual Budget for Intervention (Proactive Leak Detection) 283,187 $/year Potentially Recoverable Leakage 1, MG/year ALTERNATIVE PRESSURE MANAGEMENT SCENARIO RESULTS User-Inputted Reduction in Average System Pressure Assumed % Reduction in Average System Pressure Estimated Real Loss Reduction from Pressure Management Program Financial Savings from Pressure Management Program User-Estimated Cost of Pressure Reduction Resulting Pressure Management Program Payback Period 5.0 PSI 6% MG/Yr 67,026 $/Year 100,000 $ 1.5 Years

18 Please be in touch! Reinhard Sturm Water Systems Optimization e: Kate Gasner Water Systems Optimization e: