environmental management of siah-rud river and economic analysis on sewage purification

considering the water scarcity in iran and the importance of environmental protection, it is approperiate to investigate the environmental management of siah-rud river. it is a small river being utilized as discharge channel by factories located in the vicinity of the river. the physico-chemical characteristics of river water at 10 different sampling locations 'along with coefficient of aeration (k1, kd) , and self purification of the river were determined. using a linear computer programme , an optimization-model for the minimum treatment efficiency at each pollutant source, along with dissolved oxygen and bod, in the course of river was developed