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

ANNUAL CHANGE IN GROUNDWATER AVAILABILITY, IN MILLIONS OF ACRE-FEET PER YEAR
30
20
10
0
-10
-20
-30
"Variable"
to
Dry
mal
precipitation () (fourth driest and the driest year
-
Development and Changes to the Hydrologic Budget 75
Period of
Period of growth of water supplies Period of abundance Period of reduced supplies
drought
Representative water year
"Variable"
to
Wet
Typical
Available water resources
Dry Wet Dry
Wet
WATER YEAR
EXPLANATION
Net groundwater budget
Dry
Wet
"Variable"
to
Dry
1962 1964 1966 1968 1970 1972 1974 1976 1978 1980 1982 1984 1986 1988 1990 1992 1994 1996 1998 2000 2002
Specific yield and
compressibility of water
Groundwater flow
to Delta
Elastic and inelastic
matrix storage
Stream interaction
Landscape recharge
Pumpage
Figure B7. Simulated groundwater budget changes between water years 1962 and 2003 for the Central Valley, California.
(