California Water Supply Overview
Robert Shibatani
CEO & Consulting Hydrologist
The SHIBATANI GROUP, Inc.
California’s Annual Average Water Summary (MAF)
1998
(171% of normal)
WET
2000
(97% of normal)
NORMAL
2001
(72% of normal)
DRY
Total Supply (P &
Imports)
336.9
194.7
145.5
Total Use, Outflows, &
E/ET
331.5
200.4
159.9
5.5
-5.7
-14.3
Net Storage Change
Distribution of Dedicated Supply
Urban Uses
7.8 (8%)
8.9 (11%)
8.6 (13%)
Agricultural
27.3 (29%)
34.2 (41%)
33.7 (52%)
Environmental
59.4 (63%)
39.4 (48%)
22.5 (35%)
94.5
82.5
64.8
Total Dedicated Supply
Hydrological
perspective – California
is not water short
 Allocation and
Conveyance
 Managing within
existing infrastructure
 Managing within
existing environmental
constraints

Storage in Major CVP Reservoirs (TAF) – October 26, 2009
Reservoir
Capacity
15 Yr
Average
WY 2009
WY 2010
% of 15-Yr
Average
Trinity
2,448
1,564
1,052
908
58
Shasta
4,552
2,590
1,302
1,730
67
Oroville (SWP)
3,538
2,029
1,059
1,306
64
Folsom
977
477
243
365
76
New Melones
2,420
1,596
1,103
1,112
70
Fed. San Luis
966
367
92
305
83
Millerton
520
230
176
349
152
Total CVP
11,360
6,595
3,792
4,420
67
Major Reservoir Releases (cfs) – October 26, 2009
Watershed
Dam
WY 2009
WY 2010
15-Yr Median
Trinity
Lewiston
473
291
300
Sacramento
Keswick
6,970
5,850
5,850
Feather
Oroville
1,700
2,000
2,400
American
Nimbus
1,006
1,797
1,883
Stanislaus
Goodwin
470
1,255
695
San Joaquin
Friant
180
351
176
Accumulated Precipitation for Water Year to Date (inches) – October 26, 2009
Reservoir
Current
WY 2010
Driest
WY 1977
Wettest WY
1983
Ave
(N Yrs)
% of
Ave
Last 24
Hours
Trinity at Fish
Hatchery
1.85
0.20
1.97
1.21
(47)
153
0.00
Sacramento at
Shasta
6.16
0.07
2.26
1.91
(52)
323
0.00
American at
Blue Canyon
5.34
0.87
5.06
1.97
(34)
271
0.00
Stanislaus at
New Melones
2.35
0.00
2.06
0.86
(31)
272
0.00
San Joaquin at
Huntington
Lake
0.00
1.20
1.90
1.20
(34)
0
0.00
ANADROMOUS FISH
SMELT/STRIPED BASS
1800
Delta smelt
1500
Abundance
(abundance index from DFG Fall Midwater Trawl surveys)
1200
900
600
300
0
80000
40000
Longfin smelt
6000
4000
2000
0
16000
8000
Striped bass
1500
1000
500
0
1965
1970
1975
1980
1985
1990
1995
2000
2005


CVP-OCAP uncertainty
RPAs on both DOI/DOC
BiOps
 Salvage monitoring at the
pumps
 OMR flow monitoring
Pending Judge O.
Wanger Decisions
 Ongoing BDCP
 FLOODSafe

Long-term threats?
 Reduced Exports
 Increasingly stringent InDelta WQ standards
 Standard Term 91
 Federal Shortage Policy
changes (M&I and Ag)
 Accommodations for flood
control
 Climate change effects
 What does it all mean to
water purveyors?