Notes on determining the effective distance to a line of recharge

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Abstract
Increasing emphasis has been given in recent years to the installation of wells in sand and gravel deposits along perennial streams. Under favorable conditions water enters the aquifer from the adjacent stream so that the safe yield is not limited by recharge from local precipitation [see “References” at end of paper, Jeffords, 1946]. Some of the installations tested, however, have not been successful. At times the preliminary investigations have been inadequate, and often quantitative hydrologic techniques have been applied without adequate consideration of the existing local conditions.