Central Valley Aquifer, Chapters A and B - MAE Class Websites

A
MILLIONS OF ACRE-FEET PER YEAR
30
25
20
15
10
5
0
Figure C8
4/61-3/68
"Variable"
to
Dry
Representative water year
Figure C9
4/68-3/78
"Variable"
to
Wet
Time frame land-use maps were applied, from Chapter C
Typical
Development and Changes to the Hydrologic Budget 73
Figure C10
4/78-3/93
Dry Wet Dry
Wet
Agricultural pumping
WATER YEAR
EXPLANATION
Surface-water deliveries
Delivery requirement
Landscape recharge
Figure C11
4/93-3/99
Dry Wet
Figure C12
4/99-9/03
"Variable"
to
Dry
1962 1964 1966 1968 1970 1972 1974 1976 1978 1980 1982 1984 1986 1988 1990 1992 1994 1996 1998 2000 2002
Figure B6. A, Annual delivery requirement, landscape recharge, surface-water deliveries, and agricultural pumpage. B, Annual
groundwater withdrawals for agricultural and urban use for the entire Central Valley between 1962 and 2003. Other than urban
pumpage, all values are simulated by the Central Valley Hydrologic Model (CVHM) (). Urban pumpage compiled by California
Department of Water Resources (C. Brush, California Department of Water Resources, written commun., February 21, 2007).
represents a steady increase from less than 5 percent in 1962 to
-
urban uses ( and and ).