USGS Scientific Investigations Report 2018-5091: Characterization and Occurrence of Confined and Unconfined Aquifers in Quaternary Sediments in the Glaciated Conterminous United States

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EXPLANATION

Maximum recharge rate,

in millimeters per day

2.5

12.5

Hydrogeologic terrane boundaries—Alphanumeric code indicates the

generalized complexity of the hydrogeologic framework in each terrane

Sediment thickness contrast

Major river

Maximum extent of glacial ice

Extent of Late Wisconsinan ice

Figure 1.1B. Maximum recharge rate in the soil-water balance model (this study) in the glaciated conterminous United States.

U.S. Department of the Interior | U.S. Geological Survey
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Page Last Modified: Thursday, 06-Dec-2018 14:38:34 EST