Imported Supply Update
San Gabriel Valley Water Forum
August 28, 2012
Delta
LA Aqueduct
Colorado River Aqueduct Supplies
State Water Project Supplies
Sierra Mtns
Sources of Water for Southern California
Local Groundwater and
Recycling
Conservation
Colorado River Conditions
California 4.4 MAF - Metropolitan .550 MAF - Water Management > .700 MAF
CRACRA
CRA Supply
Upper Colorado Basin Snowpack
10/1 11/1 12/1 1/1 2/1 3/1 4/1 5/1 6/1 7/1 8/1 9/10
10
20
30
40
50
60 State of Colorado - Northern Rockies
Snow
Wat
er E
quiv
alen
t (in
)
Source of data: Colorado Basin River Forecast Center, Station JWRC2 – Joe Wright
Average
2011
2012
Sep-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
Probability of Surplus/Shortageon the Colorado River Today
Surplus Shortage
2013 0% 0%2014 6% 0%2015 16% 2%2016 23% 14%2017 26% 23%
Unused / Surplus
Basic Apportionment
IID-SDCWA Transfer All-American Canal
Coachella Canal PVID, Salton Sea Mitigation Supplies, Other*
Storage and Conjunctive Use, Surplus When Available
IID-MWD Conservation
How can we keep the Colorado River Aqueduct full?
After Quantification Settlement Agreement
State Water Project Conditions
2011 Delivery Reliability ReportComparison to Previous Reliability Studies
2005 2007 2009 20110
1,000
2,000
3,0003,298
2,8802,547 2,521
Contract Amount, Surplus and Carryover Supplies
TAF
Per Y
ear
80%Reliability
777 TAF or 24%
Less than 2005
Report61%
Reliability
Regulatory Pumping RestrictionsJAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
Delta Smelt
Salmon
Longfin Smelt San Joaquin
Salmon (Potential)
NoRe
stric
tions
Ecological Considerations Reduce Pumping Flexibility
Current as of 1/12/10
2011 Delivery Reliability Report Change To Pumping Patterns
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec0
100
200
300
400
500
Average Exports (2005 Report) Average Exports (2011 Report)
Interesting Weather Conditions
Weather Conditions in the News“More than 15,000 warm temperature records broken” -NOAA
“July 2012 being warmest single month on record” -NCDC
“Drought-hit U.S. busts heat record from Dust Bowl days” -Reuters
Record High Temperatures Affect Much of the Country
Drought Heavily Impacting Midwest
Conditions in MWD Service AreaRecent summers have been mild
La Niña weather & cooler ocean temperatures
Lower temperatures impact demands
Temperature at San Bernardino
2010
2011
2012
-10
-8
-6
-4
-2
0
2
4
6
8Difference from 30-Year Average Long-Term Monthly Average Temperature
Degr
ees F
ahre
nhei
t
Temperature at San Diego Airport
2010
2011
2012
-10
-8
-6
-4
-2
0
2
4
6
8Difference from 30-Year Average Long-Term Monthly Average Temperature
Degr
ees F
ahre
nhei
t
Temperature at Los Angeles Civic Center
2010
2011
2012
-10
-8
-6
-4
-2
0
2
4
6
8Difference from 30-Year Average Long-Term Monthly Average Temperature
Degr
ees F
ahre
nhei
t
Temperature at Newport Beach Harbor
2010
2011
2012
-10
-8
-6
-4
-2
0
2
4
6
8Difference from 30-Year Average Long-Term Monthly Average Temperature
Degr
ees F
ahre
nhei
t
Storage Levels Are Rebounding
2006 2007 2008 2009 2010 2011 20120
1
2
3
4
2.2 1.81.1 1.0
1.72.4
2.5-2.8*
Emergency Storage Storage Balance
Mill
ion
Acre
-Fee
tMWD Storage Reserve Levels2012 Based on 60% SWP Table A Allocation
* Projected based on current conditions