Thus if the bedrock is at z 0 the value of lsalt is

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Unformatted text preview: titut de Mécanique des Fluides de Toulouse, Allée Camille Soula, 31400 Toulouse, France. 1 Introduction and summary Seawater intrusion in coastal aquifers is a growing concern in Mediterranean regions, due to overpopulation and over-exploitation of coastal groundwater resources. Under these circumstances, it is essential to model the extent of seawater intrusion and to locate the saltwater-freshwater interface taking into account heterogeneity and parameter uncertainty. There are different ways to couple salt transport and freshwater flow in groundwater models. We choose here the vertically integrated sharp interface approach, with two immiscible fluid regions (freshwater and seawater). We use this model to analyze the effects of aquifer variability on the saltwater wedge in plane view, based on large numerical simulations of 2D seawater intrusion in randomly heterogeneous unconfined aquifers. 2 Groundwater flow equations with seawater intrusion We consider an unconfined coastal aquifer with an impervious bedrock at z = ZINF(x,y) and a fresh water table of elevation z = ZS(x,y). In addition, because we use a plane flow model, the vertically averaged freshwater hydraulic head H(x,...
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This document was uploaded on 01/19/2014.

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