Picard iterative methods for steady nonlinear ground water flow analysis

Abstract

Numerical fluctuations are of importance in solving unconfined ground water flow"," problems me nodes may get artificially dropped out of the computation. The Picard iterative methods associated Successive Over Relaxation method. Line p'-lternating Direction Implicit method and Strongly Implicit procedures are compared based on two steady-state test problems with one having a thin saturated lone in part of the flow domain. SIP is found to be vastly superior to the other methods. It is found that the use of larger number of Iteration parameters in the SIP method is not desirable and the best choice may be four parameters, A correct measure is proposed to avoid artificial desaturation without any significant reduction 10 the convergence rate.