198 Groundwater Availability of the <strong>Central</strong> <strong>Valley</strong> <strong>Aquifer</strong>, California WATER FLOW, IN MILLIONS OF ACRE-FEET PER YEAR B 20 15 10 5 0 -5 -10 -15 -20 1962 1964 1966 1968 1970 1972 1974 1976 1978 1980 1982 1984 1986 1988 1990 1992 1994 1996 1998 2000 2002 Figure C31. Continued. Specific yield <strong>and</strong> compressibility of water General-head boundary YEAR EXPLANATION Elastic <strong>and</strong> inelastic storage Stream leakage L<strong>and</strong>scape recharge Pumpage Flow into groundwater system Flow out of groundwater system
Table C11. Simulated farm budget for the <strong>Central</strong> <strong>Valley</strong>, California, in acre-feet per year. bold italicbolditalic. Year Precipitation Surface-water deliveries Groundwater pumpage Evapotrans- piration Runoff Simulation Results <strong>and</strong> Budget 199 Evapotrans- piration from groundwater Deep percolation 1962 14,281,000 10,808,000 11,271,000 25,505,000 1,310,000 3,522,000 12,967,000 1963 17,119,000 9,625,000 9,096,000 26,300,000 1,097,000 3,056,000 11,391,000 1964 9,877,000 9,079,000 12,156,000 24,584,000 795,000 3,484,000 9,108,000 1965 15,590,000 9,915,000 9,355,000 25,448,000 1,221,000 3,337,000 11,425,000 1966 10,876,000 9,619,000 12,918,000 24,920,000 1,071,000 3,663,000 10,976,000 1967 19,718,000 10,583,000 8,743,000 25,748,000 1,652,000 3,514,000 15,012,000 1968 11,127,000 9,322,000 12,734,000 26,118,000 820,000 3,639,000 9,798,000 1969 23,300,000 11,002,000 8,231,000 25,937,000 2,015,000 4,039,000 18,433,000 1970 18,345,000 10,261,000 10,738,000 26,122,000 1,675,000 4,342,000 15,723,000 1971 14,102,000 9,701,000 10,569,000 25,198,000 1,159,000 4,114,000 11,973,000 1972 8,042,000 10,200,000 12,875,000 25,015,000 716,000 4,139,000 9,394,000 1973 21,343,000 11,136,000 8,253,000 25,934,000 1,772,000 4,043,000 16,914,000 1974 17,548,000 11,581,000 7,854,000 26,366,000 1,311,000 3,966,000 13,154,000 1975 14,527,000 11,279,000 7,925,000 25,525,000 1,024,000 3,927,000 10,995,000 1976 9,301,000 9,560,000 10,558,000 25,581,000 453,000 3,894,000 7,177,000 1977 7,152,000 7,034,000 15,551,000 25,389,000 436,000 3,445,000 7,279,000 1978 24,651,000 10,546,000 6,768,000 27,474,000 1,755,000 3,521,000 16,088,000 1979 14,134,000 12,364,000 7,661,000 26,325,000 941,000 3,857,000 10,657,000 1980 18,453,000 11,735,000 6,230,000 26,189,000 1,257,000 3,616,000 12,472,000 1981 12,350,000 11,440,000 9,108,000 26,510,000 810,000 3,965,000 9,435,000 1982 22,260,000 11,133,000 4,956,000 26,990,000 1,386,000 3,360,000 13,176,000 1983 28,589,000 10,166,000 4,341,000 26,664,000 2,050,000 3,532,000 17,703,000 1984 13,603,000 12,098,000 7,258,000 25,091,000 1,148,000 4,640,000 11,233,000 1985 11,972,000 10,760,000 7,647,000 25,435,000 700,000 4,055,000 8,204,000 1986 19,712,000 11,273,000 5,836,000 26,435,000 1,324,000 3,809,000 12,738,000 1987 10,048,000 10,509,000 8,843,000 25,282,000 581,000 4,171,000 7,620,000 1988 12,796,000 9,390,000 9,815,000 26,129,000 792,000 3,880,000 8,850,000 1989 12,632,000 9,663,000 9,830,000 26,131,000 741,000 3,549,000 8,662,000 1990 10,121,000 8,356,000 11,690,000 25,993,000 487,000 3,331,000 6,919,000 1991 11,763,000 8,009,000 12,549,000 25,424,000 793,000 3,436,000 9,395,000 1992 13,684,000 7,889,000 12,229,000 26,666,000 821,000 3,334,000 9,546,000 1993 22,192,000 10,538,000 6,958,000 26,430,000 1,645,000 3,262,000 14,726,000 1994 11,690,000 9,676,000 9,522,000 26,196,000 617,000 3,332,000 7,295,000 1995 24,818,000 10,345,000 5,737,000 25,428,000 1,913,000 3,366,000 16,739,000 1996 17,151,000 11,843,000 6,485,000 25,973,000 1,240,000 3,814,000 11,969,000 1997 16,299,000 11,567,000 6,644,000 24,859,000 1,294,000 4,120,000 12,347,000 8,946,000 4,535,000 25,846,000 2,139,000 3,190,000 18,646,000 1999 12,511,000 10,006,000 4,831,000 22,538,000 757,000 3,969,000 7,885,000 2000 15,602,000 10,116,000 4,887,000 23,765,000 1,019,000 4,157,000 9,822,000 2001 13,197,000 9,099,000 6,127,000 24,232,000 673,000 3,925,000 7,316,000 2002 12,868,000 9,425,000 7,137,000 23,175,000 943,000 4,050,000 9,238,000 2003 16,050,000 9,571,000 5,643,000 24,252,000 1,009,000 3,695,000 9,554,000 15,752,000 10,171,000 8,621,000 25,598,000 1,128,000 3,740,000 11,427,000