Practice

Two monitoring wells 600 m apart along the direction of flow are screened in a confined sand aquifer 12 m thick. The upgradient well has a ground-surface elevation of 131.0 m and a water-level elevation of 124.6 m; the downgradient well, 127.1 m and 122.2 m. The aquifer's hydraulic conductivity is 15 m/d and its effective porosity is 0.30. The discharge through a 400-m-wide section of the aquifer, perpendicular to the flow, is most nearly:

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