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

174 Groundwater Availability of the Central Valley Aquifer, California
0 50 100 Miles
0 50 100 Kilometers
Shaded relief derived from U.S. Geological Survey
National Elevation Dataset, 2006. Albers Equal Area Conic Projection
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EXPLANATION
Subsidence, in feet, from 1961 to 1975,
(Williamson and others, 1989). Negative
values indicate uplift—
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Model streams and canals
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-1 to 0
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2 to 5
6 to 10
Active model grid boundary
Model water-balance subregion
Figure C20. Distribution of historical subsidence, estimated from 1961 to 1977 extensometer data, Central Valley, California (modified
from Williamson and others, 1989).
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