 The basic flow equation cannot be used for determining the well spacing in a "partially penetrating" well-field in a non-uniform and anisotropic aquifer, but one needs a numerical solution of more complicated equations.The costs of the "most attractive solution" can be compared with the costs of a horizontal drainage system - for which the drain spacing can be calculated with a drainage equation - serving the same purpose, to decide which system deserves preference.The well design proper is described in

An illustration of the "parameters" involved is shown in the figure.