Groundwater. Importance of Groundwater. Supplies 40\% of U.S. public drinking water. Almost all rural residents Agriculture can be dependent on groundwater for irrigation. Shapes the land surface (e.g. sinkholes, mudslides). Fig. 17.3. Occurrence of Groundwater.
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Unsat. – pores filled with air and water
Sat. – pores filled with only water
Quarries/mines must be dewatered while operating.