在无污染的天然河流和完全不作处理的污水排入的河流这两种极端情况之间,存在可行的技术处理办法使水质的污染程度成为可容许情况.由于不同的目的对水质的要求不同,加上资金的限制,欲得到可行的水质全面控制方案,一般是行不通的.一个控制水污染的问题在于找到可接受的方案(成本条件),从而达到必要的控制.卫生工程是面对这个问题的.本文的目的就是提出一个模型,并应用于分析这类问题. There is a viable technical solution to the extent of pollution of the water quality between the two extremes of uncontaminated natural rivers and completely untreated effluent discharges.Due to the different water quality requirements for different purposes, Coupled with financial constraints, it is generally not feasible to have a viable water quality control program in place, and a problem with controlling water pollution is finding acceptable protocols (cost terms) to achieve the necessary controls. The purpose of this article is to present a model that should be used to analyze this type of problem.