Abstract
We must consider an influence of pollutants from non-point sources on water quality of a river for environmental control of a river basin. Especially, in urban area, storm runoff water is much polluted by non-point pollutants. But, until now most simulation models which are developed for environmental control of river basin for predicting water quality of the river have not considered pollutants from non-point source. Therefore, we developed “The Water Quality Control System of River Basin” which has the simulation model considering non-point pollutants flushed out with storm runoff. This system can evaluate the environmental effects of construction of a sewerage system and installation of household wastewater treatment tanks on all houses in the basin. And this system can display longitudinal change and daily change of water quality at any point of the river.
