Unified Analytical Solution for Radial Flow to a Well in a Confined Aquifer

Details Unified Analytical Solution for Radial Flow to a Well in a Confined Aquifer Unified Analytical Solution for Radial Flow to a Well in a Confined Aquifer

2011-10-26

arxiv.org/abs/1110.5940v2

Physics

Mathematical Physics

Scientific paper

Drawdowns generated by extracting water from a large diameter (e.g. water supply) well are affected by wellbore storage. We present an analytical solution in Laplace transformed space for drawdown in a uniform anisotropic aquifer caused by withdrawing water at a constant rate from a partially penetrating well with storage. The solution is back transformed into the time domain numerically. When the pumping well is fully penetrating our solution reduces to that of Papadopulos and Cooper [1967]; Hantush [1964] when the pumping well has no wellbore storage; Theis [1935] when both conditions are fulfilled and Yang et.al. [2006] when the pumping well is partially penetrating, has finite radius but lacks storage. We use our solution to explore graphically the effects of partial penetration, wellbore storage and anisotropy on time evolutions of drawdown in the pumping well and in observation wells.

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