Abstract
AbstractNumerical experiments were performed to investigate saltwater intrusion and recirculation of seawater at a coastal boundary. A field-scale two-dimensional cross section was simulated in which freshwater inflow occurred at an upgradient boundary, and saltwater inflow, freshwater outflow, and recirculated seawater outflow occurred at a downgradient boundary. The upgradient boundary is a specified-flux boundary with a zero (i.e., freshwater) concentration, and the downgradient boundary is a specified-head boundary with a specified (i.e., saltwater) concentration. This problem was solved numerically using SEAWAT for two conditions; i.e., first for the uncoupled condition in which the fluid density is constant, and thus, the flow and transport equations are uncoupled in a constant-density flowfield, and then for the coupled condition in which the fluid density is a function of the concentration of total dissolved solids, and thus, the flow and transport equations are coupled in a variable-density flowf...
Published Version
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