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

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

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48 Groundwater Availability of the Central Valley Aquifer, California Predevelopment Recharge, Discharge, Water Levels, and Flows - and basin. - - - - ). Other ( Groundwater/Surface-Water Interaction - - - - - ). Aquifer-System Storage - - - - - - - serious consequences. Therefore, this type of calculation of

700 500 600 400 200 160 0 50 100 Miles 240 360 320 120 280 40 240 160 0 50 100 Kilometers Shaded relief derived from U.S. Geological Survey National Elevation Dataset, 2006. Albers Equal Area Conic Projection 0 40 40 160 80 200 200 160 160 240 160 120 240 280 400 200 240 320 400 500 700 320 200 360 EXPLANATION Predevelopment water levels Water-level altitude, in feet above NGVD 29 Figure A20. Pre-development groundwater map (modified from Williamson and others, 1989). 360 360 280 360 360 0 1 to 50 51 to 100 101 to 200 201 to 400 401 to 800 Historical lakes Central Valley boundary 320 360 400 400 400 500 Hydrogeology 49

700<br />

500<br />

600<br />

400<br />

200<br />

160<br />

0 50 100 Miles<br />

240<br />

360<br />

320<br />

120<br />

280<br />

40<br />

240<br />

160<br />

0 50 100 Kilometers<br />

Shaded relief derived from U.S. Geological Survey<br />

National Elevation Dataset, 2006. Albers Equal Area Conic Projection<br />

0<br />

40<br />

40<br />

160<br />

80<br />

200<br />

200<br />

160<br />

160<br />

240<br />

160<br />

120<br />

240<br />

280<br />

400<br />

200<br />

240<br />

320<br />

400<br />

500<br />

700<br />

320<br />

200<br />

360<br />

EXPLANATION<br />

Predevelopment water levels<br />

Water-level altitude,<br />

in feet above NGVD 29<br />

Figure A20. Pre-development groundwater map (modified from Williamson <strong>and</strong> others, 1989).<br />

360<br />

360<br />

280<br />

360<br />

360<br />

0<br />

1 to 50<br />

51 to 100<br />

101 to 200<br />

201 to 400<br />

401 to 800<br />

Historical lakes<br />

<strong>Central</strong> <strong>Valley</strong> boundary<br />

320<br />

360<br />

400<br />

400<br />

400<br />

500<br />

Hydrogeology 49

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