steve hirsch water transfers exchanges program …...steve hirsch water transfers & exchanges...
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Steve HirschWater Transfers & Exchanges Program Manager
Metropolitan Water District of Southern California
April 20, 2016
MWD Service Area
MWD Service Area
26 Member Agencies
4 MAF Annual Demand½ Local Supplies½ Imported Supplies
19 Million People
5,200 Square MilesWater Wholesaler
Upper Colorado
River BasinWatershed
Colorado River Aqueduct
CRACRA
SWPSWP
California Aqueduct
Bay-Delta
Lake Oroville
Lake Mead
Lake Powell
Average 10-year Deliveriesmillion acre-feet (MAF)
0.81.2
Factors Affecting Water Transfer NeedsService Area Demands
Availability of member’s local supplies
Availability of CRA and SWP supplies
‐1,500,000
‐1,000,000
‐500,000
0
500,000
1,000,000
1,500,000100%
94%
88%
83%
78%
73%
68%
62%
57%
52%
47%
42%
36%
31%
26%
21%
16%
10% 5% 0%
Acre‐fe
et
Exceedence Probability
Increasing ShortageIncreasing Surplus
Surplus Storage:
• Local Surface Reservoirs
• Groundwater Basins
• Programs Outside Region
Take From:
• Local Storage
• Outside Region Storage
• Transfers
‐
1
2
3
4
5
6
Million Acre‐Feet
13x Increase in Capacity
Desert / CoachellaLake Mathews& Lake Skinner
Castaic & Perris
Mojave Demo & Additional Prop. 13
Diamond Valley Lake
Lake Mead Demo
Kern Delta Prop. 13 Programs
Arvin Edison
Additional Lake Mead
Semitropic
Mojave Amendment
‐
100,000
200,000
300,000
400,000
500,000
600,000
700,000
800,000
Mojave Kern Delta Arvin‐Edison Semitropic
Storage (Acre‐Feet)
LAKESHASTA
LAKEOROVILLE
San Joaquin Valley Transfers
Sacramento Valley Transfers
BAY‐DELTA
Storage Programs:SemitropicArvin‐EdisonKern Delta, Mojave
CRA
SWP
TypesCrop Idling/Shifting
Groundwater Substitution
Reservoir Reoperation
Lake Shasta
Lake Oroville
Moves through California Aqueduct
Transfer Water Accrues May – Sept(rice irrigation schedule)
Delivered to Metropolitan
Moves through Delta once capacity is available July – Sept
(less approximately 20% losses)
Stored in Lake Oroville May ‐ June
Governor’s Drought Water Bank1991, 1992, 1994, 2009
2001 DWR Dry Year Purchase Program
2003 MWD Water Purchase Program
SWC Buyers Group 2005, 2008, 2010, 2015, 2016(?)
Yuba Accord2008‐2025
Regulatory Pumping RestrictionsJAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
Delta Smelt
Salmon
Longfin Smelt
Window restricted even during wet years
0
5
10
15
20
25
30
35
Jul Aug Sep
Thou
sand
Acre‐Feet
Total Capacity Available Under Moderate Delta Restrictions:
45 % SWP Alloc. ~ 51 TAF
50 % SWP Alloc. ~ 0 TAF
• You Can’t Handle the Truth...
• Valuing Quality over Quantity…
• Rules are Absolutely Necessary…
• I Have an Ap for That…
• I Already Gave at the Office…
• California’s Water Market is Different…