  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.
