Saltwater intrusion modeling: Verification and application to an agricultural coastal arid region in Oman

Authors:
M. Walther;J. -O. Delfs;J. Grundmann;O. Kolditz;R. Liedl
Affiliations:
Technische Universität Dresden, Institute for Groundwater Management, D-01062 Dresden, Germany;Helmholtz-Centre for Environmental Research - UFZ, Department of Environmental Informatics, Permoserstr. 15, D-04318 Leipzig, Germany;Technische Universität Dresden, Institute of Hydrology and Meteorology, D-01062 Dresden, Germany;Helmholtz-Centre for Environmental Research - UFZ, Department of Environmental Informatics, Permoserstr. 15, D-04318 Leipzig, Germany and Technische Universität Dresden, Faculty of Forest-, G ...;Technische Universität Dresden, Institute for Groundwater Management, D-01062 Dresden, Germany
Venue:
Journal of Computational and Applied Mathematics
Year:
2012

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Three-dimensional mixed finite element-finite volume approach for the solution of density-dependent flow in porous media

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Abstract

This paper deals with numerical modeling of density-dependent flow of saltwater intrusion in coastal groundwater systems. We present the implementation of an approach to solve a moving boundary problem for a dynamic water table within an invariant finite element mesh. The model is successfully validated against laboratory experiment data for an unconfined, density-dependent benchmark. The validated software is applied to a regional-scale study area and sufficiently calibrated for a steady state of pre-development conditions. Transient mass transport scenario simulations show good concordance with salinity measurements satisfyingly supporting the model setup.