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Major sources of the pollution in underground water are various compounds that may come from the runoff of cattle feedlots, from the runoff of fertilizers, pesticides, and herbicides from the cultivated lands, and from domestic and industrial wastes. The equations for the dispersion and adsorption of various chemicals in porous media are formulated to calculate pollution movement. If a bilinear rate of adsorption is assumed, two coupled nonlinear parabolic partial differential equations result. The equations can be solved by the Crank‐Nicolson method, which is a stable, two‐step method. Solutions for the range of variables involved in the movement of pollutants in porous media are obtained for a one‐dimensional model.
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Gupta et al. (1973) studied this question.
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