Abstract
This paper presents a method for the estimation of transverse dispersivity in a homogeneous isotropic coastal aquifer where salt water intrusion takes place. An approximate solution of the concentration profile on the axis perpendicular to the fresh-salt water interface is derived from a similarity approach and compared with the concentration profile measured in a laboratory experiment. A two-dimensional numerical simulation on salt water intrusion and dispersion is performed using the dispersivities estimated by the proposed method. Numerically predicted concentration profiles agree well with the experimental data. It is concluded that the proposed method is practical for the estimation of transverse dispersivity based on the measured concentration.
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