Abstract
Artificial groundwater recharge is of increasing importance as an essential component of water-management programs. The fluctuation of the water table in response to recharge depends on the size and shape of the recharging area, on the duration and the type of variation of the recharge rate, and on the hydraulic and geometric parameters of the underlying aquifer. Numerial solutions describing the formation of groundwater mounds are obtained by applying the Douglas-Jones predictor-corrector method to the second-order, nonlinear, partial-differential equation characterizing the unsteady flow in an unconfined aquifer beneath a circular uniformly recharging area. An advantage of using the method is that the predictor-corrector equations result in a tridiagonal set of simultaneous equations which can be solved rapidly in a digital computer. Furthermore, the method is computationally stable.
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