Abstract:

Along with the discharge of nitrogen and phosphorus nutrient continuously into the lake,it led to water eutrophication,made the water transparency decrease,produce odor,which was harmful to human health.Through the use of appropriate evaluation model of water body eutrophication,we can evaluate the status of water pollution,and draw a correct conclusion.Then the appropriate treatment of eutrophic conditions can be taken timely,which will reduce hazards to the water environment and human health.In this paper,the fuzzy comprehensive evaluation method was applied,the hierarchy analytic process of the evaluation index was conducted.According to the the relationship of the index,the weight of each index was determined,then the mathematical model of fuzzy comprehensive evaluation was established.Finally according to the evaluation criteria and measurement of lake and reservoir water quality data,the typical lake and reservoir eutrophication assessment conclusion was attained.The evaluation results and the actual situation were consistent,and the model is suitable for wide application