A stream depletion field experiment

A field experiment was carried out to measure drawdowns in observation well s and stream depletion flows that occurred when water was abstracted from a well beside a stream. The field data is analyzed herein to determine the a quifer transmissivity, T, the aquifer storage coefficient, S, and a streamb ed leakage parameter, lambda, by comparing measurements with a solution obt ained by Hunt (1999), The analysis uses early time drawdowns with a match-p oint method to determine T and S, and stream depletion measurements at late r times are used to determine lambda. The final results are reasonably cons istent for measurements taken in four observation wells. The advantages and disadvantages of this approach are discussed, and two alternative ways of estimating lambda, are also discussed.