• Simulation of seawater intrusion in coastal aquifers: Some typical responses

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/sadh/026/04/0317-0352

    • Keywords

       

      Seawater intrusion; coastal aquifers; density-dependent flow and transport; 3-D aquifer responses

    • Abstract

       

      Seawater intrusion in coastal aquifers is generally three dimensional (3-D) in nature. In the literature, there is a general lack of reported results on 3-D simulations. This paper presents some typical example simulations of 3-D seawater intrusion process for a specified hypothetical study area. The simulation results presented in this paper are based on the density-dependent miscible flow and transport modelling approach for simulation of seawater intrusion in coastal aquifers. A nonlinear optimization-based simulation methodology was used in this study. Various steady state simulations are performed for a specified study area. Response evaluations consider the effects of vertical recharge on seawater intrusion, effects of boundary conditions, and effects of spatially varying pumping from the aquifer. The 3-D simulations demonstrate the viability of using a planned strategy of spatially varying withdrawals from the aquifer to manage seawater intrusion. It is demonstrated that series of pumps near the ocean-face boundary induce a hydraulic head distribution that can be effectively used for controlling seawater intrusion.

    • Author Affiliations

       

      Amlan Das1 Bithin Datta2

      1. Department of Civil Engineering, Regional Engineering College, Durgapur - 713 209, India
      2. Department of Civil Engineering, Indian Institute of Technology, Kanpur - 208 016, India
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