Moulton Niguel Water District Water Loss Control Program Development

Transcription

1 MUNICIPAL DISTRICT OF ORANGE COUNTY AGENCIES MANAGERS MEETING Moulton Niguel Water District Water Loss Control Program Development February 19, 2015 Marc Serna, P.E., BCEE Director of Engineering and Operations 1

2 Outline MNWD Initial Water Loss Assessment 2013 Water Audit and Water Loss Management Approach Identifying Non-Revenue Water Loss Components Audit Deliverables Preliminary Results 2

3 2013 Initial Water Loss Assessment Large Potable Water Distribution System Questions on Accuracy of Past Reported Loss % Values Ensure Accuracy for Reporting and Management Standardized and Industry Accepted Method CUWCC BMP 1.2 Reporting Performed by MNWD Staff 3

4 2013 Water Loss Assessment Loss calculation approach AWWA M36 Customer Billing Data, Imported Metered, Exported Metered, Unmetered, Unbilled, and Operational Use Estimates Water In Billed Water out Unbilled Volume From Own Sources Water Exported Billed Metered Billed Unmetered Unbilled Metered Unbilled Unmetered REAL LOSSES (OC79 + OC81 + CM10 + SC2B) (SJC, SCWD, ETWD) Domestic + Commercial minus Exported Water SCWD 920 Zone JRP, SOCWA, 3A, 2A Basins Flushing and VACCON Water Loss Line Breaks, Service Line Leaks, Sheared Hydrants, Over Flowing Tanks 4

5 CY 2013 Water Loss Results January December 2013: Water Source Volume + Accounted-for- Estimated Water (Apparent/Real) = 29, 095 AF = 26, 363 AF = 2,732 AF = 9.4 % Water Loss Theoretical Unavoidable Real Potentially Recoverable Water = 4.0 % = 1,570 AF 5

6 Water Audit and Loss Management Approach Expert Consultant - Water System Optimization (WSO) Develop Scope of Work Define Audit Period Data Validation Prepare Tailored Water Balance Model AWWA Water Audit Identify Non-Revenue Water Loss Components Develop Appropriate Water Loss Control Strategies 6

7 Non-Revenue Water Loss Management Strategy Detailed Water Audit Conduct Detailed AWWA Water Audit to Quantify NRW Volume and its Components Real and Apparent Component Analysis Component Analysis of Real Component Analysis of Apparent Water Audit Phase Economics Assessment of Economic Real Loss Intervention Strategies Assessment of Economic Apparent Loss Intervention Strategies Implement NRW Strategy Real Loss Control and Intervention Apparent Loss Control and Intervention Sustainable NRW Management 7 Source: WSO, Inc.

8 Components of Water Audit Billed Billed Metered Billed Unmetered Unbilled Unbilled Metered Unbilled Unmetered SUPPLIED Apparent metering errors Unauthorized consumption Water Real Leakage/overflow at service reservoirs Leakage from trunk mains Leakage from distribution mains Leakage from service connections

9 Revenue Water Billed Billed Metered Billed Unmetered Unbilled Unbilled Metered Unbilled Unmetered SUPPLIED Apparent metering errors Unauthorized consumption Water Real Leakage/overflow at service reservoirs Leakage from trunk mains Leakage from distribution mains Leakage from service connections

10 Non Revenue Water Billed Billed Metered Billed Unmetered Unbilled Unbilled Metered Unbilled Unmetered SUPPLIED Apparent metering errors Unauthorized consumption NON Water Leakage/overflow at service reservoirs Real Leakage from trunk mains Leakage from distribution mains Leakage from service connections

11 Revenue Optimization OPTIMIZATION Billed Billed Metered Billed Unmetered Unbilled Unbilled Metered Unbilled Unmetered SUPPLIED Apparent metering errors Unauthorized consumption NON Water Leakage/overflow at service reservoirs Real Leakage from trunk mains Leakage from distribution mains Leakage from service connections

12 Real Loss Reduction Billed Billed Metered Billed Unmetered Unbilled Unbilled Metered Unbilled Unmetered SUPPLIED Apparent metering errors Unauthorized consumption NON Water Leakage/overflow at service reservoirs Real Leakage from trunk mains REAL LOSS REDUCTION Leakage from distribution mains Leakage from service connections

13 Understanding The Components of Real

14 Water Audit Deliverables MNWD 1. Tailored Water Balance Worksheet Water Supplied Apparent Loss (Meters) Determination Real Loss Determination Component Analysis Summary 2. Water Audit Data Collection Protocols and Training BMP Final Tech Memo Findings General Water Loss Control Recommendations 14

15 Preliminary Water Loss Results Audit Period Selected - FY Preliminary Water Loss % % Apparent Meter Loss - Very Low (0.6%) = Excellent Real Water - < 7.7% Water Loss Control Strategies - TBD 15

16 16 Questions?