DATA-ANALYSES METHODS FOR DETERMINING 2-DIMENSIONAL DISPERSIVE PARAMETERS

Two methods for calculating two-dimensional hydrodynamic dispersion parameters by analyzing experimental data, the dispersive-plume-area (DPA) method and the linear-graphic (LG) method, are proposed in this paper. The DPA method determines the dispersive parameters by analyzing the dispersive plume area after injection of a salt-water slug into an aquifer. The transverse and longitudinal dispersivity and even the porosity of an aquifer may be derived. The LG method transforms the concentration-time curve into a straight line. Using the slope of the line, dispersivity and velocity can be obtained. Both methods are examined using theoretical considerations and practical examples.