august 23, 2012 urban water institute august 23, 2012 can the colorado river meet our region’s...
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August 23, 2012Urban Water Institute
Urban Water Institute
August 23, 2012
Can the Colorado River meet our Region’s Future Water Supply Needs?
Bill HasencampManager, Colorado River Resources
Metropolitan Water District of Southern California
August 23, 2012Urban Water Institute
Urban Southern California’sWater Supply SourcesLAKE
SHASTA
LAKEOROVILLE
Bay-Delta
STATE WATER PROJECT(2.0 MAF)
LOS ANGELESAQUEDUCTS
(0.5 MAF)
COLORADO RIVERAQUEDUCT(1.25 MAF)
METROPOLITAN WATER DISTRICT SERVICE AREA
LOCAL2.0 MAF
August 23, 2012Urban Water Institute
August 23, 2012Urban Water Institute
Colorado River Apportionments (Million acre-feet)
Apportionments
Deliveries in 1990s
Mexico
Upper Basin States
Lower Basin States
1.71
2.8
.3
1.04
3.86
4.4
.84
1.5
.05
.39
.80
2.4
.2
5.1
.49
1.8
2.5
.02
August 23, 2012Urban Water Institute
One of Many Arizona Spreading BasinsStore 100,000s AF Annually
August 23, 2012Urban Water Institute
California’s 1931 Seven Party Agreement
4 MWD 0.550
5 MWD 0.662
6 IID, CVWD, PVID 0.300
7 Additional Ag Use --
1931 Agr. Priority (maf/yr)1 PVID
2 Yuma Project3(a) IID & CVWD3(b) PVID
3.850}4.4
August 23, 2012Urban Water Institute
August 23, 2012Urban Water Institute
maf
PVID
Yuma Project
IID 3.10
CVWD 0.33
MWD* 0.55
Total 4.40
*Amount fluctuates based on PVID/Yuma Project use, unused IID and CVWD water
0.42 (Average)
Quantification Settlement AgreementQuantified Water Budgets
August 23, 2012Urban Water Institute
Comparison of CA’s Water RightsUnder QSA
IID’s Share
August 23, 2012Urban Water Institute
Comparison of CA’s Water RightsUnder QSA
IID’s Share MWD’s Share
August 23, 2012Urban Water Institute
Comparison of CA’s Water RightsUnder QSA
IID’s Share MWD’s Share CVWD’s Share
August 23, 2012Urban Water Institute
California Plan and QSA Major Terms (2003)
Quantify Coachella and Imperial’s priority rights Implement Agricultural Conservation Measures
– Line All-American and Coachella Canals– Fund System Efficiency and Fallowing Programs in IID
Transfer conserved water to San Diego County and Coachella Valley
Provide Special Surplus to Metropolitan to keep Aqueduct filled through 2016
The 4.4 Plan was projected to keep MWD’s Aqueduct full for at least a decade, but that goal was no realized…
August 23, 2012Urban Water InstituteSep-02
Sep-03
Sep-04
Sep-05
Sep-06
Sep-07
Sep-08
Sep-09
Sep-10
Sep-11
Sep-12
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
Lake Mead Storage2002 – 2012
MeadSurplusShortage
x 10
00 a
cre-
feet
August 23, 2012Urban Water Institute
MWD’s Water Supply Crash
Cutback Began Jan. 1, 2003
2002 Available Supply:– 1,250,000 Acre-feet
Initial Approved Supply 2003:– 513,000 Acre-feet
August 23, 2012Urban Water Institute
QSA Transfers Delayed to Protect Salton Sea
Formed in 1905– Sustained by Ag drainage
25% Saltier than Ocean– Salinity increase 1%/yr– Soon too Salty for Fish
QSA Protected Sea from Transfer Impact for 15 years– IID fallows land and delivers
water to Salton Sea to mitigate SDCWA transfer through 2017
– State to cover any increase in transfer mitigation costs
– State agrees to restore Sea
August 23, 2012Urban Water Institute
Southern Nevada
Water Agency
Arizona Groundwater
Storage Program
Yuma Desalting
Plant/Drop 2
DesertWater Agency
Coachella ValleyWater District
Palo Verde
I.D.
MWD/SDCWA Partnerships
AAC Lining
IID Conservation
August 23, 2012Urban Water Institute
Colorado River Supply Available to Metropolitan Water District
2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 20110
250
500
750
1,000
1,250
Su
pp
ly (
TA
F)
August 23, 2012Urban Water Institute
2006 2007 2008 2009 2010 20110
20000
40000
60000
80000
100000
120000
140000
160000
180000
200000T
ho
us
an
d A
cre
Fe
et
MWD's ICS Stored in Lake Mead2006-11
Total 2012 ICS balance, after losses: 435 TAF
August 23, 2012Urban Water Institute
Where do we go from here?Long-term Options for Refilling CRA
Additional Ag Transfers in CA?– IID Board stated no new transfers beyond QSA– PVID has provided temporary increases– CVWD and Bard have limited options
Binational Projects with Mexico?– Much potential, but currently no mechanisms in place– Following panel to discuss current effort in more detail
Partnerships with other states?– Interstate water sharing?
Basin Study is 7 states effort to evaluate most promising options and plan for their implementation
