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

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100 Groundwater Availability of the Central Valley Aquifer, California GROUND MOVEMENT, IN FEET B Rebound Subsidence -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 2.0 2.5 "Variable" to Dry Figure B15. Continued. "Variable" to Wet 1960 1970 1980 - and subsidence ( (, , and Dry Wet Dry YEAR 11N/1E-24Q8 17S/15E-14Q1 23S/25E-16N3 EXPLANATION 18S/16E-33A1 14S/12E-12H1 13S/15E-31J3 32S/28E-20Q1 Wet 1990 2000 Total simulated pumpage for the Central Valley "Variable" to Dry and ). - - most areas ( 20 15 10 5 0 SIMULATED PUMPAGE, IN MILLIONS OF ACRE-FEET PER YEAR
compaction and land subsidence in some areas ( and ). In some areas, 2004) ( - - - ” subsection of the “” section. Surface Water and the Environment - - When water levels recover, compaction and land subsidence can abate. DEPTH-TO-WATER, IN FEET BELOW LAND SURFACE COMPACTION, IN INCHES 200 400 600 12 0 Deep well No data 1960 1970 1980 YEAR Drought Drought No data 1990 Development and Changes to the Hydrologic Budget 101 - nation of and - (). - During the droughts of 1976-77 and 1987-91, deliveries of imported water to the west side of the San Joaquin Valley were cut back. More groundwater was pumped to meet the demand, resulting in a drop in the water table and consequent compaction. Some elastic expansion of the aquifer system has occured but the compacted materials can never return to their pre-compacted thickness. Figure B16. Measured compaction in relation to head decline in the San Joaquin Valley. The effects of drought on groundwater levels and associated subsidence also are evident. (Modified from Galloway and others, 1999; and Swanson, 1998.)
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GROUNDWATER RESOURCES PROGRAM Groun
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Groundwater Availability of the Cen
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Foreword An adequate supply of grou
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Contents Chapter A Introduction, Ov
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Chapter C Numerical Model of the Hy
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Figures Chapter A Figure A1. Map of
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Figure B12. Map of altitude of the
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Figure C28. Pie chart and histogram
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Conversion Factors Inch/Pound to SI
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Chapter A. Introduction, Overview o
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- - precipitation. -
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40° 39° 38° 37° 36° 35° Klama
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Texture Model DATA Centralized Geos
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Hydrology Water Well Information Aq
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Table A1. Water-balance subregions
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B Red Bluff 0 50 100 Miles 0 50 100
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Delta and Eastside Streams ).
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for about 30 percent of the annual
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0 50 100 Miles 0 50 100 Kilometers
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A Coast Ranges Clayey lenses Fault
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- the distribution of these pro
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C DEPTH TO MIDPOINT OF INCREMENT, I
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). The southern part, referred , in
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3-D Model of Percentage of Coarse-G
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A Layer 1 EXPLANATION Central Valle
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C Layer Corcoran Clay EXPLANATION C
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E Layer 9 EXPLANATION Central Valle
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Geomorphic province— Basin Delta
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San Joaquin Valley ),
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- Water supplied from aquifers
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C Figure A16. Continued. 3.54% 5.45
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CUMULATIVE DEPARTURE OF PRECIPITATI
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CUMULATIVE DEPARTURE OF STREAMFLOW
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Page 71 and 72: Water Budget per year (
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Page 75: References Cited 57 - - 2009, at
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150 Groundwater Availability of the
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Manuscript appproved on April 16, 2
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