Abstract
Quantitative analysis of the fate of point source pollutants in streams can be achieved by using moment analysis if the input concentration is periodic. The moment analysis permits the discrimination among various proposed models and permits the estimation of the parameters in the selected model for describing the fate of the substance in a river. Ortho phosphorus enters the Sandusky River from the Bucyrus, Ohio, sewage treatment plant with a diurnal periodic concentration change. Moment analysis is used to discriminate between reversible adsorption in the sediments and the irreversible precipitation or microbial utilization in the sediments. The parameters for the irreversible model are calculated. These include the reaction rate constant and the dispersion in the river.
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