Optimization Model Based Technical-economic Evaluation Methodology of Nutrient Standards in the Lake of Fuxian

A technical-economic evaluation framework of lake nutrient standards was built based on a survey of economic analysis of water quality standards in the USA and the current environmental management system in China. Reduction quantity was obtained after calculating lake nutrient capacity and the input to the lake under the condition of suggested standard values. The reduction quantity was distributed by an uncertainty optimization model, and the control cost of eutrophication was accounted. The effects of the standard implementation on the lake basin economic development were evaluated. This evaluation method was applied to the technical-economic evaluation system of Fuxian Lake. The results demonstrated that the reduction cost of the schemes based on the optimized model was lower than that of the original planning of Fuxian Lake. The reduction cost was evaluated through the technical-economic evaluation framework, and the results showed that the impact on the lake basin economy was moderate if the standard was implemented.