Less Loss is our Gain Water Loss Control in Los Angeles

Transcription

1 Less Loss is our Gain Water Loss Control in Los Angeles December 5, 2017 Peter Dugan, Water Loss Task Force Project Engineer Reynold Wong, Water Loss Task Force Project Engineer

2 LADWP California s Largest Public Utility 473 square miles 4 million people served 7,327 miles of mains 737,583 services 111 Pressure Zones 60,804 Hydrants 430 million gallons of water delivered per day

3 Sources of Supply Bay Delta State Water Project Sierra Nevada Mountains LA Aqueduct Colorado River Aqueduct Local Groundwater, Stormwater, Conservation & Recycling 3 3

4 Water Loss Control Program 2013 Water Loss Audit and Component Analysis study recommendations State Regulatory Requirements Minimize production costs / maximize revenue collection Saving Water Saves money and property loss!!!

5 Real Loss Component Analysis Results Majority is background leakage: Pressure management Infrastructure renewal and rehabilitation Some potential to reduce hidden losses: Active leak detection Reported breaks: Reduce response time Background Leakage, 64% Reported Breaks, 23% Hidden Losses, 13%

6 District Metered Areas DMAs Meters installed through hot tap Data loggers and batteries installed in locked vaults (above ground) Discovered leaks / tampering and theft Zone Name Total Number of Service Connections Average Pipe Age (Years) Boyle Heights Westwood Tujunga 6,285 1,814 1, Leaks Found

7 Action Plan Action Plan Categories 1. System Input Volume 2. Database Management 3. Meter Testing and Replacement 4. Leak Detection and Prevention 5. Unmetered and Unauthorized Use 7

8 Track Volumes Closer to Distribution System Well Field Filtration Plant Well Head Meter Well Head Meter Well Head Meter Well Head Meter Inlet Meter Filtration Plant Filtration Plant Forebay Total UV Flow Total UV Flow UV Plant UV Plant Outlet Meter LA LA Res Res LADWP POTABLE DISTRIBUTION SYSTEM LADWP POTABLE DISTRIBUTION SYSTEM 8

9 Supply Meter Calibration Program Develop calibration program 32 production meters 20 pressure transducers, cells, floats and totalizers MWD Meter Workgroup 35 MWD connections Site visits: MWD calibration

10 Supply Meter Accuracy Testing Tank Flow Meter Meter Testing Facility In-Place Volumetric Test Flow Meter Flow Meter 1 2 In-Place Comparative Test 10

11 Install Supply Meters LA-25 = JPI - SFO +/- Reservoir Change JPI Jensen Plant MWD Reservoir 1 Sepulveda Feeder SFO LA-25 LA-25 (99 inch dia.) Connection with Metropolitan Water District (MWD) Add full profile insertion magnetic meter Leverage existing corrosion protection project Cost estimated at $250,000 Future: LA-35, Comparative Meter Test 11

12 Database Consolidation and Access SCADA Control Systems Consolidated Access LAWSDAC Supports Transmission Operations TOCC Water Quality Control LAAFP LA Filtration Plant Operational Control OTS Operational Technology System Owens Valley SCADA Operational Control for Out-of- City Stations 12

13 Customer Meter Testing & Replacement Prioritized large meter maintenance based on consumption Goal to replace 30,000 small meters Representative sample meter testing 13

14 Small Customer Meter Bench Testing Small meters 96% of total stock 1,326 meters tested in FY16/17 Representative sample based on size, type, and age 14

15 Small Meter Test Results Meter Size Overall Accuracy 5/8" 5/8x3/4" 3/4" 1R 1.5" 2" 97.60% 98.64% 98.61% 99.01% 98.61% 97.43% 15

16 Current Process for Monitoring Pressure Manual operation Short-duration Data is not available in real-time Less accurate 16

17 Pressure Monitoring Pilot Program Pilot began in December pressure recorders were installed Worked with vendor to develop logger that can be installed on hydrant s auxiliary nut 17

18 Benefits from Live Pressure Monitoring Hydraulic modeling Water Loss Task Action Plan (Lower pressure in the 13 leakiest zones) Leak detection (Live alerts, & computer) Operator can monitor the pressure from a remote location and receive real time updates Customer Inquiries: Improve response time and cost

19 Leak Detection Pilot Program Pilot Project Objectives Verify Accuracy and Effectiveness Evaluate Ease of Use Evaluate Large Scale Deployment Evaluate Multiple Technologies Phase 1: Fixed leak detection and monitoring (2017) Phase 2: Manual Leak Survey (2018) 4

20 Mobile Leak Reporting Demonstration Project Real-time communication to management Improve customer outage communication Improve loss estimates Eliminate paper reporting 20

21 Lengths of Main in Thousand Feet Mainline Replacement Mainline Replacement $1.3 billion dollars over 5 years 184,000 ft. in FY Expected to replace over 215,000 ft. FY

22 AMR/AMI to Fire Services 2013 Water Loss Study found significant consumption on fire services AMR installed on 2,000+ fire services AMI to be installed as part of Dept.-wide program 22

23 Tracking Unmetered Uses Fire Fighting Methodology Based on fire engine pump hours Water Main Flushing Based on annual pipe installations Street Sweeping Uses Based on truck trips and capacity Sewer Flushing Based on Sanitation estimates 23

24 Future Expectations Pressure Monitoring Leak Detection Main Line Replacement AMI Gather data on 40% of system in 2018 Gather data on 1/3 of system in 2018 Replace over 500,000 ft. of main in 2018 Begin Implementation of AMI in

25 Thank You! Visit our website at: Sofia Marcus Peter Dugan Reynold Wong 25