Los Angeles Chamber of Commerce November 20, 2015 David R. - PowerPoint PPT Presentation

Securing a Sustainable Water Supply for Los Angeles Los Angeles Chamber of Commerce November 20, 2015 David R. Pettijohn, P.E. Director of Water Resources Los Angeles Department of Water and Power

LADWP Today • Service area (469 square miles) • Provide Water and Power to approximately 4 million people every day • Over 494 million gallons of water delivered per day – 553,900 acre-feet per year 2

Water System Infrastructure Our Water System infrastructure:  About 697,100 water service accounts  About 7,260 miles of distribution mains  114 local tanks / reservoirs  9 LAA reservoirs  78 pump stations  421 regulator stations  23 chlorination stations  7 fluoridation stations  60,400 fire hydrants  Advanced water treatment facility uses ozone and UV for disinfectio n 3

Sources of Water for Los Angeles Sierra Mountains Bay Delta LA Aqueduct State Water Project Colorado River Aqueduct Local Groundwater, Stormwater, Conservation & Recycling 4

Runoff Is Key to Imported Supplies 5

State and Local Water Resources Demands • 39 million California 2/3 of the residents supply • 3.9 million Los Angeles residents • Supply and demand challenge 2/3 of the demand 6

Record Dry Conditions • CY 2013 Driest on Record • Jan 2014 Lowest Snowpack • WY 2014 4 th Lowest Runoff • 2014 Temps Record High • April 2015 Lowest statewide snowpack 7

Reliance on MWD in Dry Y ears Fiscal Year Ending 2011 - 2015 Fiscal Year 2014 - 2015 Average Production: 550,355 AFY Total Production: 513,540 AFY Recycled LA Water Aqueduct 10,437 53,546 Recycled 2% 10% Water LA Aqueduct 8,549 160,461 2% 29% Local GW Local GW 87,046 67,135 17% 12% MWD 362,607 MWD 71% 313,988 57% 8

Prolonged Drought Potential • Tree ring data suggests potential for a series of decade long droughts and/or prolonged “megadroughts” in the West • Potential for current four year drought to be a prolonged event 9

State and Local Drought Response • October 14, 2014: Mayor’s Executive Directive Order #5 • April 1, 2015: Governor’s Executive Order • May 5, 2015: Final Draft State Emergency Conservation Regulations • November 13, 2015: Extension of existing State Emergency Conservation Regulations 10

LA’s Phase II Watering Restrictions 11

City Conservation Ordinances • 1977 – Emergency Water Conservation Plan Ordinance • 1988 – Plumbing Retrofit Ordinance • 1996 – Landscape Ordinance • 1998 – Retrofit on Resale Ordinance • 2009 – Water Efficiency Plumbing Requirements Ordinance • 2015 – Amendment of Emergency Water Conservation Plan 12

Water Conservation Response Unit 13

Water Conservation Media Campaign: Drought Messaging and Outreach 14

Water Waste Reporting • WATERWASTE@LADWP.COM • MYLA311 Website and Phone App 15

Residential & Commercial Rebate Amounts $100 Up to $1.75/ sq.ft . Up to $200 $400 $500 Free $3,000 $300 $200 Up to $13 16

E D5 Progress Tracking – Total GPCD 17% reduction over 20 years 16% reduction over 6 years 17

Current Dry Year Supplies 500 Mayors ED5 (485 TAF) 450 Governor’s Executive Order (474 TAF) 400 Thousand Acre-Feet (TAF) 350 334 MWD 300 250 200 150 61 Los Angeles Aqueduct 100 79 50 Local Groundwater 11 Recycled Water 0 Projected 15/16 Supplies 18 18

Long Term Water Supply & Reliability Challenges Climate Change Los Angeles Aqueduct: Supply reduction due to Owens Lake dust mitigation Seismic Risk to Imported Supplies Bay-Delta Uncertainty Colorado River Aqueduct Rising MWD Water Costs Local Groundwater: Contamination in the San Fernando Basin 19

Long Term Solution for Reliable Water Supply Recycled Water Stormwater Capture Water Conservation SF Groundwater Basin Remediation Local Water Supply Reliability 20

Local Supply Development Conservation Goal: 64,500 AFY Local City Ordinances Commercial Programs Residential Programs CONSERVE Public Outreach & Education $1.75 /sq ft LADWP Partnerships 21 21

Local Supply Development Stormwater Capture Goal: 68,000 – 114,000 AFY Dam Improvements Cisterns CAPTURE Distributed Centralized Spreading Basins Rain Gardens Rain Barrels 22

Stormwater Capture Potential Distributed and Centralized Capture - 2 0 3 5 200 Average Annual Capture Volume (1,000 AF) Future Distributed Capture 150 63 Future Centralized 114 Capture 33 Existing Distributed 100 68 Capture 51 Baseline/Existing 35 Capture Existing Centralized Capture 50 35 35 35 29 29 29 0 Baseline Conservative Aggressive 23

Local Supply Development Recycled Water Goal: 59,000 AFY Indirect Potable Reuse Non-Potable Reuse Wastewater Treatment Urban Water Use Water Treatment Advanced Water Purification Nature 24

SF Groundwater Basin Remediation Remediation of San Fernando Basin and Restoration of up to 112,670 AFY groundwater supplies Planned groundwater basin remediation crucial to fully utilize the San Fernando Basin GAC Treatment at Tujunga Well Fields – Pilot Study Pollock Water Treatment Facility 25 25

Water Supply Planning E fforts FUTURE* TODAY FYE 2035 FYE 2011-2015 Average Total: 711,000 AFY Total: 513,540 AFY *Estimated from the 2010 Urban Water Management Plan 26

Investments in Infrastructure and Local Water Development Additional Revenues With Proposed Rate Action will address : • Aging infrastructure • Local Water Resource Development • Regulatory Issues 27

What is E L NIÑO? • Unusual warm ocean temperatures in the Equatorial Pacific • 1997/98 - last very strong El Niño 28

Current Year Comparison 29

E astern Sierra - Precipitation Conditions November 17, 2015 30

Rainfall Comparison Los Angeles Downtown USC Campus Station 14 13.68 ” 12 Avg (1887 - 2015) 10 1997-98 (El Nino) Precipitation (inches) 2014-15 8 6 4 3.25” 2 0.83” 0 July Aug. Sept. Oct. Nov. Dec. Jan. Feb. March April May June 31

3 Month Precipitation Outlook Dec – Jan - Feb 32

Preparing for E L NIÑO Stormwater Capture Centralized Stormwater Capture • Groundwater replenishment facilities • Maximize potential stormwater capture recharge up to 90,000 AF in the San Fernando Basin 33

Preparing for E L NIÑO Stormwater Capture Distributed Stormwater Capture • Maximize small scale distributed stormwater capture projects • Examples include: • Infiltration swales • Pervious pavement • Rain garden • Rain Barrels • Cisterns 34

Preparing for E L NIÑO Water System • Inspection of facilities • Adequate stockpile of emergency supplies and equipment (sand bags, portable generators, portable pumps) • Vegetation maintenance • Clean out catch basins • Execute Emergency Response Plan • Coordination with MWD • Monitor water quality 35

Questions? www.LADWP.com/localwater 36 36