BEM solution of stochastic seawater intrusion problems

In this paper, the stochastic saltwater-freshwater interface location in co astal aquifer is sought, subject to the uncertainty of input parameters suc h as hydraulic conductivity, freshwater outflow, and pumping rate. The boun dary element method, combined with an optimization technique, is used as th e tool for deterministic solution to search for the interface location. A s econd order perturbation technique is employed to find the statistical mome nts of the prediction. Three saltwater intrusion examples of different geom etries are examined. (C) 1999 Elsevier Science Ltd. All rights reserved.