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

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194 Groundwater Availability of the <strong>Central</strong> <strong>Valley</strong> <strong>Aquifer</strong>, California<br />

WATER FLOW, IN MILLIONS OF ACRE-FEET PER YEAR<br />

60<br />

40<br />

20<br />

0<br />

-20<br />

-40<br />

-60<br />

1962 1964 1966 1968 1970 1972 1974 1976 1978 1980 1982 1984 1986 1988 1990 1992 1994 1996 1998 2000 2002<br />

Evapotranspiration<br />

Runoff<br />

Deep percolation<br />

-<br />

<br />

<br />

( <strong>and</strong> <strong>and</strong> , , <strong>and</strong> <br />

1962 <strong>and</strong> 2003, <br />

-<br />

<br />

<br />

<br />

<br />

-<br />

<br />

YEAR<br />

EXPLANATION<br />

Figure C29. Farm budget changes through time for the <strong>Central</strong> <strong>Valley</strong>, California.<br />

Evapotranspiration from groundwater<br />

Groundwater pumpage<br />

Surface-water deliveries<br />

Precipitation<br />

Flow into l<strong>and</strong>scape<br />

system<br />

Flow out of l<strong>and</strong>scape<br />

system<br />

<br />

-<br />

<br />

<br />

<br />

son<br />

<strong>and</strong> others (1989) (<br />

<br />

).

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