Author(s)

M. Di Natale

Abstract

A simplified numerical model to evaluate the concentration profiles of reactive pollutants in a natural river system is presented. The model, subdivided in several calculation forms, provides, first of all, of a geometrical schematisation of the system in a linear branch and basins with an elementary shape, in such a way as to deduce easily the flows per unit width in the system, in the flood, low level and ordinary conditions. Assuming the hypothesis of hydraulic flux in uniform motion, and subdividing each branch of the system into stretches of elementary length, every stretch is regarded as a chemical dispersion flux reactor, for which a simplified analytical expression of concentration profile is deduced. An example of application of the proposed model for the case of the

Keywords