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Pumping test in a confined aquifer under tidal influence
Robert P Chapuis1, Christian Bélanger, Djaouida Chenaf
1Department of Civil, Geological, and Mining Engineering; Ecole Polytechnique, P.O. Box 6079 Stn CV, Montréal, QC, Canada H3C 3A7. robert.chapuis@polymtl.ca
Abstract:
In a coastal environment, tide-induced head fluctuations can complicate the interpretation of drawdown data from pumping tests. For confined aquifers and sinusoidal tides, the superposition principle can be used to obtain a closed-form solution. After subtracting the net tidal effects, the drawdown data become amenable to the standard analyses. Numerical simulations have shown that the method is reliable when the distance of the monitoring well to the well does not exceed 10% of the distance between the well and the tidal boundary.
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