Motion of the seawater interface in a coastal aquifer by the method of successive steady states (original) (raw)
1985, Journal of Hydrology
The paper describes a method for determining the motion of the seawater interface in a phreatic coastal aquifer during a specified time period in response to changing hydrologic conditions, provided a seaward flow of fresh water is maintained everywhere above the interface. The method of successive steady states is used, leading to an approximate analytical expression which gives the motion of the interface toe during the time period as a function of the initial conditions and the change in freshwater flow to the sea above the toe during the time period. Sensitivity of the results to values of parameters and to hydrologic conditions is investigated, and the results are compared with those obtained by other methods of analysis. The motivation for developing the approximate analytical expression for movement of the interface was to facilitate the introduction of seawater intrusion as a criterion in the multiobjective management model for coastal aquifers.
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