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

180 Groundwater Availability of the Central Valley Aquifer, California
PUMPAGE, IN MILLIONS OF ACRE-FEET PER YEAR
16
12
8
4
Table C9. Estimated and Central Valley Hydrologic Model-simulated average and unit evapotranspiration of applied water (ETaw) for
the Central Valley, California.
Basin
"Variable"
to
Dry
"Variable"
to
Wet
Area
(square
miles)
Dry
Wet Dry
Wet
Estimated unit (average)
ETaw 1957–1961 ETaw 1966-–1973 ETaw 1968–1978
"Variable"
to
Dry
0
1962 1964 1966 1968 1970 1972 1974 1976 1978 1980 1982 1984 1986 1988 1990 1992 1994 1996 1998 2000 2002
Simulated ETaw
average
(1962–2003)
5,981 2.4 (2.49) 2.3 (2.84) 1.9 (3.04) 1.8 (2.20)
2,388 2.2 (1.86) 2.1 (1.96) 1.8 (1.91) 1.9 (1.00)
3,782 2.5 (2.76) 2.0 (2.48) 2.3 (3.16) 2.3 (2.90)
7,780 2.1 (4.46) 2.2 (6.390) 2.2 (7.13) 2.3 (8.20)
19,389 2.3 (11.57) 2.1 (13.67) 2.1 (15.24) 2.1( 14.30)
YEAR
EXPLANATION
Simulated agricultural
Estimated from
power usage
Figure C22. Agricultural pumpage from 1961–77 estimated from power records (Diamond and Williamson, 1983) compared to Central
Valley Hydrologic Model simulated agricultural pumpage for the Central Valley, California.