A Mathematical Model for Phosphorus Movement in Soils
1975
Shah, Dhananjai B. | Coulman, George A. | Novak, Lawrence T. | Ellis, Boyd G.
Land application of municipal and industrial wastes is increasingly being looked upon as an alternative for treatment of the effluent. Since phosphorus compounds constitute a major potential source of ground water contamination, it is important to study the movement of these compounds in the soil. In this paper, a model for the movement of P has been developed. Material balance equations for water in the soil pore spaces, P in the liquid phase, and adsorbed P on the soil have been formulated. These equations are solved numerically to simulate the P concentration profiles in the soil solution and in the soil as functions of depth for an operating waste disposal system. The results of the simulation show a good agreement with the field data. The model can be used to determine the response of the system for a given input of phosphates and thus is a useful tool in the design and management of such systems.
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