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Scientific Investigations Report 2018-5091

Figure 21

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EXPLANATION

Annual recharge from the soil-water balance
model, in millimeters per year.
0 to 25
>25 to 50
>50 to 75
>75 to 100
>100 to 125
>125 to 175
>175 to 250
>250 to 325
>325 to 500
>500
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 21. Annual recharge in the glaciated conterminous United States based on the soil-water balance model.






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