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

Figure B12. Map of altitude of the A, Water table in the unconfined part of the aquifer
system. B, Potentiometric surface of the confined part of the aquifer system for
1961. C, Unconfined part of the aquifer system. D, Potentiometric surface of
the confined part of the aquifer system for 1976. E, Unconfined part of
the aquifer system. F, Potentiometric surface of the confined part of the
aquifer system, for 2000 .....................................................................................................86
Figure B13. Map showing hydrographs for representative wells in the Central Valley,
California ................................................................................................................................92
Figure B14. Map of estimated depth to water table in spring 2000 ...................................................96
Figure B15. A, Map of areal extent of land subsidence in the Central Valley and
locations of extensometers. B, Graph of compaction data from selected
extensometers and total simulated pumpage in the Central Valley ............................99
Figure B16. Graph of measured compaction in relation to head decline in the
San Joaquin Valley .............................................................................................................101
Figure B17. Graph showing streamflow gains and losses in the Central Valley
between 1962 and 2003 .....................................................................................................105
Figure B18. Diagram of relationship of water-level changes and critical heads to
subsidence and inelastic compaction ...........................................................................109
Chapter C
Figure C1. Map of Central Valley Hydrologic Model grid: A, Extent of San Joaquin
Formation, Corcoran Member of the Tulare Formation, crystalline bedrock,
and horizontal flow barriers. B, Upper-most active layer............................................124
Figure C2. Map of distribution of general-head boundary cells and major streams
and canals with streamflow-routing cells (including location of inflows and
diversions) ...........................................................................................................................127
Figure C3. Map of distribution of urban and agricultural wells simulated in the
Central Valley Hydrologic Model ....................................................................................129
Figure C4. Graph of urban pumpage from U.S. Geological Survey and California
Department of Water Resources data ............................................................................131
Figure C5. Flow chart of water inflows to and outflows from a “farm” as simulated
by the Farm Process (FMP) .............................................................................................133
Figure C6. Map of agricultural soils for the Central Valley, California, derived from
STATSGO data ....................................................................................................................136
Figure C7. Graph showing cumulative departure of precipitation, Pacific Decadal
Oscillation (PDO) Index, climate windows, and time frame land-use maps
were applied .......................................................................................................................137
Figure C8. Map showing virtual crops for 1960 (modified with 2000 data), including
pie chart of percentage of different virtual crops ........................................................140
Figure C9. Map showing virtual crops for 1973, including pie chart of percentage of
different virtual crops ........................................................................................................141
Figure C10. Map showing virtual crops for 1992, including pie chart of percentage of
different virtual crops .......................................................................................................142
Figure C11. Map showing virtual crops for 1998, including pie chart of percentage of
different virtual crops .......................................................................................................144
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