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1 10 100 1000 Time (days)

1 10 100 1000 Time (days)

FIG. 9.9.2 Examples of variation of specific discharge with pumping rate and time. (Reprinted from J. Bear, 1979, Hydraulics of groundwater, McGraw-Hill, Inc.)

not penetrate through the entire thickness of the aquifer are called partially penetrating wells or imperfect wells. Imperfect wells are encountered more often in practice than perfect, fully penetrating, wells. Imperfect wells can also have open or closed ends. Figure 9.9.3 shows various configurations of wells in an unconfined aquifer (ordinary

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