Author(s): S. K. Ukarande; M. Tech.; Principal; A. K. Rastogi
Linked Author(s):
Keywords: Seawater Intrusion; Numerical Modeling; Aquifer; Dispersion
Abstract: A numerical model is developed to study two-dimensional steady state seawater intrusion problem involving hydrodynamic dispersion in a synthetic confined coastal aquifer. In this approach two non-linear partial differential equations of flow and solute transport are coupled. These equations are expressed in terms of head and concentration, both, as dependent variables. Solutions are obtained by Galerkin’s finite element method. First the results are compared with some of the existing solutions. Seawater control measures involving combined system of treated water recharge and saltwater discharge wells are analyzed. The verified model is extended to investigate effect of pumping wells located on landward side of seawater intrusion. Present study finds optimum location of freshwater discharge wells. Influence of well head variation on the safe delivery of freshwater supply in coastal aquifers is investigated. The study concluded that a combined system of pumping wells located on landward side while combined system of treated water recharge and saltwater discharge wells on seaward side has significant influence on movement of diffused sea-fresh water interface.
Year: 2005