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

66 Groundwater Availability of the Central Valley Aquifer, California
Table B1. Summary of the simulated landscape budget for average (water years 1962-2003), typical (1975), dry (1990), and wet (1998)
years for the Central Valley, California.
Precip-
itation
Input to landscape system Output from landscape system
Surface
surface-water
deliveries
Groundwater
pumpage
Evapotranspiration
from
groundwater
Evapotranspiration
Runoff
Deep percolation
Ground-
water
recharge
15.8 10.2 8.6 3.7 25.6 1.1 11.4 7.7
Typical 14.5 11.3 7.9 3.9 25.5 1 11 7.0
10.1 8.4 11.7 3.3 26 0.5 6.9 3.6
Wet 30.2 8.9 4.5 3.2 25.8 2.1 18.6 15.4
Table B2. Summary of the simulated groundwater budget for average (water years 1962-2003), typical (1975), dry (1990), and wet (1998)
years for the Central Valley, California.
-
]
Storage from
specific yield and
compressibility of
water
Elastic and inelastic
storage
Input to the groundwater system
Stream leakage to
groundwater
Recharge from
landscape process
Intra-borehole
flow
General head
boundaries
8.1 1 2.6 10.7 0.4 0.0
Typical 6.5 1.1 1.9 10.2 0.4 0.0
2.8 0.6 1.1 6.3 0.4 0.1
Wet 20.9 1.5 7.5 18.1 0.3 0.0
Output from the groundwater system
Storage
(specific yield and
compressibility
of water)
Storage
(elastic and
inelastic
compaction)
Groundwater
inflow to
streams
Discharge
from landscape
process
Pumpage
General head
boundaries
8.5 2 2.2 3. 9.7 0.1
Typical 7.7 1.7 2.4 3.1 8.7 0.1
8.8 3 1.6 2.6 12.6 0
Wet 18.9 1 4.1 2.6 6.2 0.5
Net in relation to groundwater availability
Storage from
specific yield and
compressibility of
water
Elastic and inelastic
storage
Stream
interaction
Recharge
from landscape
process
Pumpage
General head
boundaries
0.3 7.8
Typical 7.1
3.7 0
Wet 12 0.5 3.3 15.5
Recharge and Discharge
-
times (Williamson and others, 1989).
(