AQUIFER DRAWDOWN AND VARIABLE-STAGE STREAM DEPLETION INDUCED BY A NEARBY PUMPING WELL

摘要

A stream depletion phenomenon has been studied for many decades, and different analytical models were developed to find the effect of a pumping well on a nearby stream. Most developed models consider a constant stream stage or neglect the variation in stream stage. This is not the case in reality where the streams flow and level continuously vary over time.In this paper a new analytical model was developed considering variation in stream flow (i.e. stream stage). The developed model considers the recession of stream flow and its impact on stream depletion and drawdown. Comparison between the developed solution and the existing ones shows a significant discrepancy when the stream flow varies.