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

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D<br />

Figure B12. Continued.<br />

500<br />

400 320<br />

280<br />

240<br />

200<br />

160<br />

80<br />

40<br />

0<br />

40<br />

80<br />

120<br />

120<br />

40<br />

0<br />

-40<br />

-40<br />

0 50 100 Miles<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 />

80<br />

0<br />

80<br />

40<br />

80<br />

80<br />

120<br />

-40<br />

Development <strong>and</strong> Changes to the Hydrologic Budget 89<br />

-80<br />

240<br />

160 80<br />

-80<br />

400<br />

0<br />

160<br />

-40<br />

0<br />

EXPLANATION<br />

Spring 1976<br />

Potentiometric surface of the lower part<br />

of the aquifer system (from Williamson <strong>and</strong> others, 1989),<br />

in feet above NGVD 29—<br />

40<br />

200<br />

400<br />

-200 to -100<br />

-99 to 0<br />

160<br />

280<br />

200<br />

40<br />

1 to 100<br />

101 to 250<br />

251 to 500<br />

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

Major streams <strong>and</strong> canals<br />

Direction of flow<br />

0<br />

200<br />

360<br />

320<br />

280<br />

320<br />

280<br />

200<br />

320<br />

240<br />

160<br />

160<br />

120<br />

80<br />

200

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