Central Valley Aquifer, Chapters A and B - MAE Class Websites
Central Valley Aquifer, Chapters A and B - MAE Class Websites Central Valley Aquifer, Chapters A and B - MAE Class Websites
194 Groundwater Availability of the Central Valley Aquifer, California WATER FLOW, IN MILLIONS OF ACRE-FEET PER YEAR 60 40 20 0 -20 -40 -60 1962 1964 1966 1968 1970 1972 1974 1976 1978 1980 1982 1984 1986 1988 1990 1992 1994 1996 1998 2000 2002 Evapotranspiration Runoff Deep percolation - ( and and , , and 1962 and 2003, - - YEAR EXPLANATION Figure C29. Farm budget changes through time for the Central Valley, California. Evapotranspiration from groundwater Groundwater pumpage Surface-water deliveries Precipitation Flow into landscape system Flow out of landscape system - son and others (1989) ( ).
A ESTIMATED WATER USAGE, IN MILLIONS OF ACRE-FEET PER YEAR B ESTIMATED WATER USAGE, IN MILLIONS OF ACRE-FEET PER YEAR 6 5 4 3 2 1 0 6 5 4 3 2 1 0 Simulation Results and Budget 195 "Variable" to Dry Wet Dry Wet 1962 1964 1966 1968 1970 1972 1974 1976 1978 1980 1982 WATER YEAR 1977 1978 1979 1980 1981 1982 1983 1984 1985 WATER YEAR Total farm delivery requirements Routed surface-water deliveries EXPLANATION Non-routed surface-water deliveries Groundwater pumpage Figure C30. Farm budget changes through time for water-balance subregion 13, western San Joaquin Valley, Central Valley, California. A, Water years 1962–2003. B, Water years 1977–1985.
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A<br />
ESTIMATED WATER USAGE,<br />
IN MILLIONS OF ACRE-FEET PER YEAR<br />
B<br />
ESTIMATED WATER USAGE,<br />
IN MILLIONS OF ACRE-FEET PER YEAR<br />
6<br />
5<br />
4<br />
3<br />
2<br />
1<br />
0<br />
6<br />
5<br />
4<br />
3<br />
2<br />
1<br />
0<br />
Simulation Results <strong>and</strong> Budget 195<br />
"Variable"<br />
to<br />
Dry Wet<br />
Dry Wet<br />
1962 1964 1966 1968 1970 1972 1974 1976 1978 1980 1982<br />
WATER YEAR<br />
1977 1978 1979 1980 1981 1982 1983 1984 1985<br />
WATER YEAR<br />
Total farm delivery requirements<br />
Routed surface-water deliveries<br />
EXPLANATION<br />
Non-routed surface-water deliveries<br />
Groundwater pumpage<br />
Figure C30. Farm budget changes through time for water-balance subregion 13, western San Joaquin <strong>Valley</strong>, <strong>Central</strong> <strong>Valley</strong>, California.<br />
A, Water years 1962–2003. B, Water years 1977–1985.
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