Unconsolidated sand and gravel aquifers

GROUND WATER ATLAS of the UNITED STATES
Introduction and National Summary

Unconsolidated sand and gravel aquifers

Figure 5 Diagrammatic section showing the structure of basin-fill aquifers
Figure 6 Diagrammatic section showing flow through open and closed basin-fill aquifers

Figure 7 Map showing the location of the High Plains aquifer
Figure 8 Graph showing ground-water withdrawals from the High Plains aquifer for irrigation
Figure 9 Map showing water level change in the High Plains aquifer from predevelopment conditions to 1980
Figure 10 Map showing change in saturated-thickness in the High Plains aquifer from predevelopment conditions to 1980
Figure 11 Map showing direction of water movement in the High Plains aquifer

Figure 12 Diagram showing the structures of the valley-fill glacial deposit aquifers and of the glacial outwash plains aquifers
Figure 13 Map showing water flow in the valley-fill glacial-deposit aquifer of the Little Androscoggin River valley in southwestern Maine