海绵城市低影响开发措施综合效益评价体系及应用

Comprehensive benefits evaluation system and application of low impact development measures in sponge city

为对低影响开发(LID)措施综合效益进行量化评价,综合考虑生态、经济及社会等因素,选取径流量削减率、污染物削减率、成本投资、运行效益、雨水利用、生态价值等16项LID措施评价指标,采用层次分析法和熵权法确定指标权重,基于云模型构建了LID措施综合效益评价体系。将评价体系应用于南京一住宅小区的4个LID措施初步设计方案量化评价,结果显示,功效最大型方案截污减排效益最优,社会效益良好,对于“较优”的隶属度最大,为最优方案。

In order to quantitatively evaluate the comprehensive benefits of low impact development(LID),taking ecological,economic and social factors into consideration to select sixteen LID measures evaluation indicators,including runoff cut rate,pollutant cut rate,cost investment,operational benefits,rainwater utilization,and ecological value,using analytic hierarchy process and entropy weight method to determine the index weight.The LID measure comprehensive benefits evaluation system is established based on the cloud model.The evaluation system are applied to a certain area of Nanjing to quantitatively evaluate the preliminary design schemes of 4 LID measures.The results show that the most effective scheme has the best pollution interception and emission reduction benefits and good social benefits.And it has the highest degree of subordination to the“better”,being the best scheme.