Mathematical Modeling of Self- Purification Capacity of Surface Currents. Study Case: Portoviejo River, Ecuador

Abstract

It is proposed a phenomenological model to describe the behavior of oxygen concentration with respect to distance from wastewater loading into the river. It taken into account processes associated with con-taminants biodegradation and oxygen transfer through interface air-water. The model was used to study contamination of Portoviejo River, Manabí, Ecuador. Experimental results were adjusted to an approx-imate solution of the obtained no-linear equations system, and it was possible to estimate parameters which are related with the capacity of self-purification of two river zones.