Optimal and sustainable extraction of groundwater in coastal aquifers |
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| Authors: | Khalid Qahman Abdelkader Larabi Driss Ouazar Ahmed Naji Alexander H -D Cheng |
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| Institution: | (1) Department of Civil Engineering, Ecole Mohammadia d Ingénieurs, Université Mohammed V-Agdal, 765, Agdal, Rabat, Morocco;(2) Department of Mineral Engineering, Ecole Mohammadia dIngénieurs, Université Mohammed V-Agdal, 765, Agdal, Rabat, Morocco;(3) Faculty of Science, Université Abdelmalek Essaadi, Tangier, Morocco;(4) Department of Civil Engineering, University of Mississippi, MS 38677, USA |
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| Abstract: | Four examples are investigated for the optimal and sustainable extraction of groundwater from a coastal aquifer under the threat of seawater intrusion. The objectives and constraints of these management scenarios include maximizing the total volume of water pumped, maximizing the profit of selling water, minimizing the operational and water treatment costs, minimizing the salt concentration of the pumped water, and controlling the drawdown limits. The physical model is based on the density-dependent advective-dispersive solute transport model. Genetic algorithm is used as the optimization tool. The models are tested on a hypothetical confined aquifer with four pumping wells located at various depths. These solutions establish the feasibility of simulating various management scenarios under complex three-dimensional flow and transport processes in coastal aquifers for the optimal and sustainable use of groundwater. |
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| Keywords: | Seawater intrusion Genetic algorithm Pumping optimization Density-dependent miscible transport |
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