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

Simulated groundwater budget
INPUT OUTPUT
EXPLANATION
Development and Changes to the Hydrologic Budget 65
Typical Year 1975
51%
2%
32%
6% 0%
9%
Dry Year 1990
55%
Wet Year 20.86
1998
0%
38%
4%
15%
25%
43%
3%
10%
1%
5%
0%
MILLIONS OF ACRE-FEET
MILLIONS OF ACRE-FEET
MILLIONS OF ACRE-FEET
20
16
12
Specific yield and
compressibility of water
Elastic and inelastic
matrix storage
8
4
0
20
16
12
8
4
0
20
16
12
8
4
0
6.50
2.78
0.03
0.06
0.01
1.13
0.58
1.47
1.90
1.11
7.46
10.19
6.29
18.14
Surface-water loss to
groundwater system
Recharge from
landscape system
Intra-borehole flow
0.44
0.39
37%
43%
27%
11%
13%
9%
18%
33%
7% 0%
10%
6%
32%
10%
38%
4% 2%
0%
Specific yield and
compressibility of water
Elastic and inelastic
matrix storage
MILLIONS OF ACRE-FEET
MILLIONS OF ACRE-FEET
20
16
12
8
4
0
20
16
12
8
4
0
7.67
9.43
0.11
0.03
Groundwater lost
to streams
Evapotranspiration from
groundwater
Pumpage
Figure B3. Simulated groundwater budget for the Central Valley for typical (1975), dry (1990), and wet (1998) years.
0.31
MILLIONS OF ACRE-FEET
20
16
12
8
4
0
8.83
0.45
1.66
2.99
1.00
2.36
1.64
4.12
3.05
2.00
2.65
8.72
12.60
6.18