Abstract:
The proposed numerical model for estimation of advective and dispersive saltwater transport below a partially penetrating
pumping well, incorporates a solution of the coupled flow and transport equations. The advective transport is computed by a varied form
of the method of characteristics wherein each moving point is assigned a volume rather than the concentration. Subsequently, the
dispersive component is accounted for by solving the transport equation by finite-difference technique treating the precomputed advective
transport as a source/sink term. The model permits estimation of the time and space variant salt concentration in soil water and the time
variant salt concentration in pumped water. The model has been validated against two analytical solutions and a set of published field data.