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

▶
los angeles chamber of commerce november 20 2015 david r
SMART_READER_LITE
LIVE PREVIEW

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

Dec 24, 2023 181 likes •558 views

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

slide-1
SLIDE 1

Los Angeles Chamber of Commerce November 20, 2015 David R. Pettijohn, P.E.

Director of Water Resources Los Angeles Department of Water and Power

Securing a Sustainable Water Supply for Los Angeles

slide-2
SLIDE 2

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

slide-3
SLIDE 3

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 disinfection

Water System Infrastructure

3

slide-4
SLIDE 4

Sources of Water for Los Angeles

Bay Delta LA Aqueduct Colorado River Aqueduct State Water Project Sierra Mountains Local Groundwater, Stormwater, Conservation & Recycling

4

slide-5
SLIDE 5

Runoff Is Key to Imported Supplies

5

slide-6
SLIDE 6

State and Local Water Resources Demands

2/3 of the supply

  • 39 million California

residents

  • 3.9 million Los Angeles

residents

  • Supply and demand

challenge

2/3 of the demand

6

slide-7
SLIDE 7

Record Dry Conditions

  • CY 2013

Driest on Record

  • Jan 2014

Lowest Snowpack

  • WY 2014

4th Lowest Runoff

  • 2014 Temps

Record High

  • April 2015

Lowest statewide snowpack

7

slide-8
SLIDE 8

Reliance on MWD in Dry Y ears

8

MWD 313,988 57% LA Aqueduct 160,461 29% Recycled Water 8,549 2% Local GW 67,135 12%

Fiscal Year Ending 2011 - 2015 Average Production: 550,355 AFY

MWD 362,607 71% LA Aqueduct 53,546 10% Recycled Water 10,437 2% Local GW 87,046 17%

Fiscal Year 2014 - 2015 Total Production: 513,540 AFY

slide-9
SLIDE 9

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

slide-10
SLIDE 10

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

slide-11
SLIDE 11

LA’s Phase II Watering Restrictions

11

slide-12
SLIDE 12
  • 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

City Conservation Ordinances

12

slide-13
SLIDE 13

Water Conservation Response Unit

13

slide-14
SLIDE 14

Water Conservation Media Campaign: Drought Messaging and Outreach

14

slide-15
SLIDE 15

Water Waste Reporting

  • WATERWASTE@LADWP.COM
  • MYLA311 Website and Phone App

15

slide-16
SLIDE 16

Residential & Commercial Rebate Amounts

Up to $13

$100

Up to $200

$300

Up to $1.75/sq.ft.

Free $500 $3,000 16 $200 $400

slide-17
SLIDE 17

E D5 Progress Tracking – Total GPCD

17

17% reduction over 20 years 16% reduction over 6 years

slide-18
SLIDE 18

11 Recycled Water 79 Local Groundwater 61 Los Angeles Aqueduct 334 MWD

50 100 150 200 250 300 350 400 450 500

Projected 15/16 Supplies

Thousand Acre-Feet (TAF) 18

Governor’s Executive Order (474 TAF)

Mayors ED5 (485 TAF)

Current Dry Year Supplies

18

slide-19
SLIDE 19

Los Angeles Aqueduct: Supply reduction due to Owens Lake dust mitigation

Long Term Water Supply & Reliability Challenges

Climate Change Bay-Delta Uncertainty Colorado River Aqueduct Local Groundwater: Contamination in the San Fernando Basin Rising MWD Water Costs Seismic Risk to Imported Supplies

19

slide-20
SLIDE 20

Long Term Solution for Reliable Water Supply

Local Water Supply Reliability

Recycled Water

SF Groundwater Basin Remediation

Stormwater Capture Water Conservation

20

slide-21
SLIDE 21

Local Supply Development Conservation

Local City Ordinances Commercial Programs Residential Programs Public Outreach & Education

LADWP Partnerships

CONSERVE

Goal: 64,500 AFY

21 21

$1.75 /sq ft

slide-22
SLIDE 22

Local Supply Development Stormwater Capture

CAPTURE

Distributed

Dam Improvements Rain Gardens Spreading Basins Rain Barrels Cisterns

Goal: 68,000 – 114,000 AFY

22

Centralized

slide-23
SLIDE 23

29 29 29 35 35 35 35 51 33 63 50 100 150 200 Baseline Conservative Aggressive Average Annual Capture Volume (1,000 AF) Baseline/Existing Capture

23 Distributed and Centralized Capture - 2 0 3 5

68 114

Future Distributed Capture Future Centralized Capture Existing Distributed Capture Existing Centralized Capture

Stormwater Capture Potential

slide-24
SLIDE 24

Local Supply Development Recycled Water

Indirect Potable Reuse

Non-Potable Reuse

Urban Water Use Wastewater Treatment Water Treatment Nature Advanced Water Purification

Goal: 59,000 AFY

24

slide-25
SLIDE 25

SF Groundwater Basin Remediation

25

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

slide-26
SLIDE 26

TODAY

FYE 2011-2015 Average Total: 513,540 AFY

FUTURE*

FYE 2035 Total: 711,000 AFY

*Estimated from the 2010 Urban Water Management Plan

26

Water Supply Planning E fforts

slide-27
SLIDE 27

Investments in Infrastructure and Local Water Development

Additional Revenues With Proposed Rate Action will address:

  • Aging infrastructure
  • Local Water Resource

Development

  • Regulatory Issues

27

slide-28
SLIDE 28

What is E L NIÑO?

  • Unusual warm ocean temperatures in the Equatorial Pacific
  • 1997/98 - last very strong El Niño

28

slide-29
SLIDE 29

Current Year Comparison

29

slide-30
SLIDE 30

E astern Sierra - Precipitation Conditions November 17, 2015

30

slide-31
SLIDE 31

Rainfall Comparison

2 4 6 8 10 12 14

July Aug. Sept. Oct. Nov. Dec. Jan. Feb. March April May June Precipitation (inches)

Los Angeles Downtown USC Campus Station

Avg (1887 - 2015) 1997-98 (El Nino) 2014-15 13.68” 3.25” 0.83”

31

slide-32
SLIDE 32

Dec – Jan - Feb

3 Month Precipitation Outlook

32

slide-33
SLIDE 33

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

slide-34
SLIDE 34

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 Stormwater Capture

slide-35
SLIDE 35
  • 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

Preparing for E L NIÑO Water System

35

slide-36
SLIDE 36

36

www.LADWP.com/localwater

Questions?

36