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Jamshidzadeh Z, Ghasemzadeh H. The effects of cut-off walls on repulsing saltwater based on modeling of density-driven groundwater flow and salt transport. NMCE. 2017; 1 (4) :45-53
URL: http://nmce.kntu.ac.ir/article-1-94-en.html
Assistant professor, Faculty of Engineering, University of Kashan, Kashan, Iran , jamshidzadeh@kashanu.ac.ir
Abstract:   (1681 Views)


A two-dimensional fully implicit finite difference model, which can be easily extended to three dimensions, is developed to study the effect of cut-off walls on saltwater intrusion into the aquifers. This model consists of a coupled system of two nonlinear partial differential equations which describe unsteady density-driven groundwater flow and solute transport. The numerical model is verified by the Henry problem. A good agreement between this model and the semianalitical solution of Henry problem shows the efficiency of this method for seawater intrusion problems. The effect of cut-off walls on reduction of saltwater intrusion in the Henry problem is investigated. Furthermore, the effect of geometric parameters of the cut-off wall such as depth and distance from the coast on repulsing saltwater is considered. Subsequently, the application of the presented model is considered to evaluate the effect of cut-off wall on repulsing salt water intruded by a pumping well located above the transition zone, which demonstrates that the cut-off wall has strong impact on repulsing saltwater intruded. For example, it repulses more than 45% salt water intruded by the discharge well in the Henry problem.
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Type of Study: Research | Subject: General

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