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

Figures
Chapter A
Figure A1. Map of Central Valley major geomorphic provinces, alluvial fans of the
San Joaquin Basin, and extent and thickness of Corcoran Clay ....................................5
Figure A2. Diagram showing the relation and flow of information used in analyzing the
Central Valley Hydrogeologic system .................................................................................7
Figure A3. Diagram showing the diversity of data types and categories included in the
centralized geospatial database ..........................................................................................8
Figure A4. Diagram showing an example of the detail for compilation, integration, and
analysis for one data type (water-level nformation) .........................................................9
Figure A5. A, Map of surface-water inflows and average annual precipitation for
September 1961 through September 2003 throughout the Central Valley,
California. B, Map showing average annual reference evapotranspiration (ETo)
for September 1961 through September 2003 throughout the Central Valley,
California ................................................................................................................................12
Figure A6. Graph of average monthly precipitation for Redding, Davis, and
Bakersfield, California ..........................................................................................................14
Figure A7. Map of general features of the surface-water system in the Central
Valley, California ....................................................................................................................16
Figure A8. Map of distribution of water-balance subregions (WBSs) used for
surface-water delivery and estimation of groundwater pumpage ...............................19
Figure A9. Generalized cross-sections showing pre- and post-development of the
A, Sacramento Valley. B, Central part of the San Joaquin Valley,
California .................................................................................................................................21
Figure A10. A, Map of Central Valley showing groundwater basins and subbasins,
groupings of basins and subbasins into spatial provinces and domains for
textural analysis. B, Map showing distribution of wells used for mapping texture.
C, Graph showing count of wells for each depth increment by domains
through 1,200 feet .................................................................................................................24
Figure A11. Generalized hydrogeologic section (A–A’) indicating the vertical discretization
of the numerical model of the groundwater-flow system in the Central Valley,
California ................................................................................................................................29
Figure A12. Maps showing kriged distribution of coarse-grained deposits for layers 1, 3,
Corcoran Clay, 6, and 9 of the groundwater-flow model. A, Layer 1. B, Layer 3.
C, Corcoran Clay. D, Layer 6. E, Layer 9 .............................................................................31
Figure A13. Block diagram of kriged texture within groundwater-flow model ..............................36
Figure A14. Map showing distribution of coarse-grained deposits for the upper 50 feet
for part of the Central Valley...............................................................................................37
Figure A15. Graph of cumulative distributions of kriged sediment textures for model
layers in the A, Sacramento Valley. B, San Joaquin Valley and Tulare Basin ...........38
Figure A16. A, Bar chart of total inflow from 44 gaged streams flowing into the
Central Valley, California, water years 1962–2003. B, Graph of average annual
precipitation in the Central Valley, California, water years 1962–2003.
C, Pie chart of total surface-water flow into the Central Valley, California,
water years 1962–2003 .......................................................................................................42
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