San Joaquin River Hydrology Summary of Memorandum prepared for 1

San Joaquin River Hydrology
Summary of Memorandum prepared for
San Joaquin River Group Authority
January 22, 2008
1
San Joaquin River Hydrology
Unimpaired Flow at Vernalis
20,000,000
WY Volume (Acre-feet
18,000,000
37-year Average
6,576,000 acre-feet
16,000,000
14,000,000
12,000,000
10,000,000
8,000,000
6,000,000
4,000,000
2,000,000
2007
2005
2003
2001
1999
1997
1995
1993
1991
1989
1987
1985
1983
1981
1979
1977
1975
1973
1971
0
Water Year
The unimpaired runoff at Vernalis is a conceptual parameter representing the calculated unimpaired runoff at the San
Joaquin River’s major tributaries’ foothill reservoirs (e.g., near New Melones Reservoir), added to runoff of the San Joaquin
Valley’s minor streams and valley floor, plus overflows into the San Joaquin River from the Kings River. The parameter, as
computed at Vernalis, is a general indication of the surface runoff in the basin but does not include depletions within the
basin.
January 22, 2008
2
San Joaquin River Hydrology
Unimpaired Flow at Vernalis
20,000,000
WY Volume (Acre-feet
18,000,000
Recent four years of
dry hydrology
16,000,000
95
14,000,000
98
97
12,000,000
05
10,000,000
96
8,000,000
00 99
6,000,000
03
6,576,000 acre-feet
02 04
01
4,000,000
2,000,000
0
0
10
Based on rank ordering of 1971-2007 volumes
January 22, 2008
20
30
40
50
60
70
80
90
100
Percentage of Time Value Exceeds or Equals
3
San Joaquin River Hydrology
Measured Flow at Vernalis
20,000,000
37-year Average
3,292,000 acre-feet
WY Volume (Acre-feet
18,000,000
16,000,000
14,000,000
12,000,000
10,000,000
8,000,000
6,000,000
4,000,000
2,000,000
2007
2005
2003
2001
1999
1997
1995
1993
1991
1989
1987
1985
1983
1981
1979
1977
1975
1973
1971
0
Water Year
Measured Flow at Vernalis
20,000,000
Jan-Jun Volume (Acre-feet
18,000,000
16,000,000
37-year Average
2,323,000 acre-feet
14,000,000
12,000,000
10,000,000
8,000,000
6,000,000
4,000,000
2,000,000
2007
2005
2003
2001
1999
1997
1995
1993
1991
1989
1987
1985
1983
1981
1979
1977
1975
1973
1971
0
Water Year
January 22, 2008
4
San Joaquin River Hydrology
Measured Flow at Vernalis
20,000,000
WY Volume (Acre-feet
18,000,000
16,000,000
14,000,000
12,000,000
10,000,000
98
8,000,000
97
95
6,000,000
96 05 99
4,000,000
00
01
02 04 03
2,000,000
0
0
10
Based on rank ordering of 1971-2007
volumes
20
30
40
50
60
70
80
90
100
Percentage of Time Value Exceeds or Equals
Measured Flow at Vernalis
20,000,000
Jan-Jun Volume (Acre-feet
18,000,000
16,000,000
14,000,000
12,000,000
10,000,000
8,000,000
98
97
6,000,000
95
05 96
4,000,000
99 00
01
2,000,000
04 02 03
0
0
10
Based on rank ordering of 1971-2007
volumes
January 22, 2008
20
30
40
50
60
70
80
90
100
Percentage of Time Value Exceeds or Equals
5
San Joaquin River Hydrology
SJR Ratio of Total Inflow
35%
30%
25%
20%
15%
10%
5%
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
1993
1994
1992
1991
1990
1989
1988
1987
1986
1985
1984
1983
1982
1981
1980
1979
1978
1977
1976
1975
1974
1973
1972
1971
0%
Water Year
SJR Ratio of Total Inflow (Jan-June)
35%
30%
25%
20%
15%
10%
5%
1993
1992
1991
1990
1989
1988
1987
1986
1985
1984
1983
1982
1981
1980
1979
1978
1977
1976
1975
1974
1973
1972
1971
0%
Water Year
The ratio represents the numeric result of San Joaquin River measured flow (Vernalis) divided by the sum of
that flow, Sacramento River flow (Sacramento) and Yolo Bypass flow.
January 22, 2008
6
San Joaquin River Hydrology
Measured San Joaquin River Flow and Delta Smelt Abundance
1,800
1,600
10,000,000
1,400
8,000,000
1,200
1,000
6,000,000
800
4,000,000
600
Smelt Indices
Jan-Jun Flow (Acre-feet)
12,000,000
400
2,000,000
200
0
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
0
San Joaquin River Flow
TNS x 10
FMWT
35%
1,800
30%
1,600
1,200
20%
1,000
15%
800
600
10%
Smelt Indices
1,400
25%
400
SJR Ratio of Total Inflow
TNS x 10
2007
2006
2005
2003
2004
2002
2001
2000
1999
1998
1997
1995
1996
1994
1993
1992
1991
1990
1989
1988
1987
1986
1985
1984
1983
1982
1981
1980
1979
1977
1978
1976
1975
1974
0
1973
200
0%
1972
5%
1971
Ratio (Percent)
SJR Ratio of Total Inflow (Jan-June) and Delta Smelt Abundance
FMWT
Smelt Abundance Indices: "Petition to the State of California Fish and Game Commission and Supporting Information for
Listing the Delta Smelt (Hypomesus transpacificaus) as an Endangered Species under the California Endangered Species
Act", The Bay Institute, etal., February 7, 2007. Table 1.
January 22, 2008
7
San Joaquin River Group Authority
January 22, 2008
San Joaquin River Group Authority
1
The 2002 San Joaquin Valley water year hydrologic
classification was “Dry.”
- The classification index was 2,341,004 MAF
- Unimpaired Vernalis flow was 4,119,915 MAF.
- The ratio of SJR flow to total inflow (Sac + SJR)
was 10%.
- Total exports (CCC + CFB + JPP) were
5,499,327 MAF.
January 22, 2008
San Joaquin River Group Authority
2
January 22, 2008
San Joaquin River Group Authority
3
January 22, 2008
San Joaquin River Group Authority
4
January 22, 2008
San Joaquin River Group Authority
5
April 1-14, 2002. Historical Conditions
January 22, 2008
San Joaquin River Group Authority
6
April 1-14, 2002. Historical Conditions
January 22, 2008
San Joaquin River Group Authority
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January 22, 2008
San Joaquin River Group Authority
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July 1-31, 2002. Historical Conditions
January 22, 2008
San Joaquin River Group Authority
9
July 1-31, 2002. Historical Conditions
January 22, 2008
San Joaquin River Group Authority
10
In 1972, the United States Bureau of Reclamation mapped
the water rights in the South Delta.
Reclamation listed appropriative water rights and
distinguished between lands that it could and could not
assume had riparian water rights.
The Division of Water Rights is using the same maps in
their South Delta Salinity project.
The SJRGA examined the Reclamation maps depicting
Union Island, Roberts Island, and the San Joaquin
River from Vernalis to Old River.
January 22, 2008
San Joaquin River Group Authority
11
Sacramento-San Joaquin Delta, with Diversions Pursuant to Water Rights in cfs
Middle
River
149
San Joaquin River
Delta Channels
353
Old River
+
Middle
River
703
Old River
555
SJR
at
Vernalis
1,253
January 22, 2008
San Joaquin River Group Authority
12
April 1-14, 2002. Flow remaining after satisfying Delta water rights.
Historical
conditions.
No barriers.
SJR inflow:
1,820 cfs
Old River
+
Middle
River
+617
CVP Export:
3,500 cfs
SWP Export:
3,990 cfs
SJR at
Vernalis
+517
January 22, 2008
San Joaquin River Group Authority
13
April 1-14, 2002. Flow remaining after satisfying Delta water rights.
Historical
conditions.
Maximizing
San Joaquin
River as
Source.
Old River
+
Middle
River
+617
No barriers.
SJR inflow:
1,820 cfs
CVP Export:
3,500 cfs
SWP Export:
3,990 cfs
SJR at
Vernalis
+517
January 22, 2008
San Joaquin River Group Authority
14
April 1-14, 2002. Flow remaining after satisfying Delta water rights.
Historical
conditions.
Maximizing
Sacramento
River as
Source.
Old River
+
Middle
River
-203
Barriers
installed.
SJR inflow:
1,820 cfs
CVP Export:
3,500 cfs
SWP Export:
3,990 cfs
SJR at
Vernalis
+517
January 22, 2008
San Joaquin River Group Authority
15
July 1-31, 2002. Flow remaining after satisfying Delta water rights.
Historical
conditions.
Barriers
installed.
SJR inflow:
1,280 cfs
Old River
+
Middle
River
+77
CVP Export:
4,350 cfs
SWP Export:
6,220 cfs
SJR at
Vernalis
-113
January 22, 2008
San Joaquin River Group Authority
16
July 1-31, 2002. Flow remaining after satisfying Delta water rights.
Historical
conditions.
Maximizing
San Joaquin
River as
Source.
Old River
+
Middle
River
467
No barriers.
SJR inflow:
1,280 cfs
CVP Export:
4,350 cfs
SWP Export:
6,220 cfs
SJR at
Vernalis
-113
January 22, 2008
San Joaquin River Group Authority
17
July 1-31, 2002. Flow remaining after satisfying Delta water rights.
Historical
conditions.
Maximizing
Sacramento
River as
Source.
Old River
+
Middle
River
-263
No barriers.
SJR inflow:
1,280 cfs
CVP Export:
4,350 cfs
SWP Export:
6,220 cfs
SJR at
Vernalis
-113
January 22, 2008
San Joaquin River Group Authority
18
OBSERVATIONS
-
-
-
For April 1-14, 2002, San Joaquin River inflow at
Vernalis exceeded the amount of water Delta water right
holders could divert by 517 cfs.
By July 1-31, 2002, the amount of water Delta water right
holders could divert exceeded San Joaquin River inflow
by 113 cfs.
Barriers elevate reverse flows in Old and Middle River.
Barriers reduce the amount of flow available to water
right holders.
Barriers increase flow in the San Joaquin River below
the Head of Old River.
Barriers prevent reverse flows in the San Joaquin River
below the Head of Old River in July.
January 22, 2008
San Joaquin River Group Authority
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