乡镇中小河流防洪工程综合效益评价研究

探究乡镇中小河流防洪工程评价模式，对完善流域防洪体系建设具有重要意义。本研究以西河三龙段为研究对象，从经济效益、社会效益以及环境效益三个方面选取了13 个乡镇河流防洪工程效益评价指标，采用层次分析法确定了指标权重，基于模糊综合评价模型分析了西河三龙段在防洪工程建设前后的综合效益。研究结果表明西河三龙段防洪工程发挥的社会效益＞环境效益＞经济效益，社会效益、环境效益和经济效益在防洪工程综合效益中的权重占比分别为0.442 9、0.387 3 和0.169 8。同时，防洪工程建设后综合效益由原来的较差等级（隶属度0.299）改善为较好等级（隶属度0.686），西河三龙段的防洪工程各项效益得到了充分发挥。

英文摘要:

Exploring the evaluation mode of small and medium-sized river flood control projects in townships is of great significance to improve the construction of watershed flood control system.In this study, the Sanlong section of the Xihe river was taken as the research object.From the three aspects of economic benefits, social benefits and environmental benefits, the indicators for evaluating the benefits of flood control projects for the rivers in the 13 townships were selected.The analytic hierarchy process was used to determine the index weight.Based on the fuzzy comprehensive evaluation model, the comprehensive benefits of the Sanlong section of the Xihe river before and after the construction of the flood control project were analyzed.The results show that the social benefits are more than the environmental benefits, followed by the economic benefits of the flood control project in the Sanlong section of the Xihe river.The proportion of social benefits, environmental benefits and economic benefits in the comprehensive benefits of flood control projects is 0.442 9, 0.387 3 and 0.169 8 respectively.At the same time, the comprehensive benefit of the flood control project is improved from the original poor grade with the membership degree of 0.299 to the better grade with the membership degree of 0.686 after constructing the flood control projects, and the benefits of the flood control projects in the Sanlong section of the Xihe river have been brought into full play.

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