HA 730-B Central Valley Aquifer System

GROUND WATER ATLAS of the UNITED STATES
California, Nevada
HA 730-B

Central Valley aquifer system

(figures 71-101)

Introduction

Figure 71 -- Map of Central Valley aquifer system
Figure 72 -- Map of Central Valley floor
Figure 73 -- Map of average annual runoff

Geologic setting

Figure 74 -- Block diagram showing Central Valley geology
Figure 75 -- Stacked maps of ancestral Central Valley, deposition of marine rocks
Figure 76 -- Map of thickness of continental deposits

Geohydrologic setting

Figure 77 -- Diagram of Central Valley geology
Figure 78 -- Diagram of concepts of the aquifer system

Ground-water flow system

Figure 79 -- Map of water table contours
Figure 80 -- Map of recharge and discharge areas
Figure 81 -- Diagrammatic section showing water movement

Postdevelopment ground- water flow system

Figure 82 -- Map of hydraulic-head change in the lower confined aquifer, 1860- 1961
Figure 83 -- Map of potentiometric contours, 1961
Figure 84 -- Map of hydraulic head
Figure 85 -- Diagram showing change in ground-water flow patterns
Figure 86 -- Map showing hydraulic head change in lower confined aquifer, 1961-1976
Figure 87 -- Diagram showing change in ground water movement due to development

Water budget of the aquifer system

Figure 88 -- Diagram of water budget

Water budget of the aquifer system

Figure 89 -- Maps of withdrawals, 1975 and 1977
Figure 90 -- Graph of ground water and surface water use
Figure 91 -- Diagram of freshwater withdrawn, 1985
Figure 92 -- Diagram of ground water use

Land subsidence

Figure 93 -- Map of land subsidence
Figure 94 -- Photograph showing land subsidence near Mendota
Figure 95 -- Graph showing depth to water, and compaction
Figure 96 -- Map of subsidence, southern Central Valley
Figure 97 -- Graph of subsidence

Ground-water quality

Figure 98 -- Map of aquifer saturated with freshwater
Figure 99 -- Map of dissolved solids
Figure 100 -- Map of saline irrigation return flow
Figure 101 -- Map of areas affected by chemical concentrations

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