The aim of the thesis was to quantify the control effect of LID and build a model by LID for water ecological community through SWMM which was based on the principle of runoff generation from excess rain,the method of nonlinear flow concentration,and the calculation method of pipelines transport by de Saint-Venant system of equations.To this end,the author performed simulation and evaluation of the five schemes,namely the initial state,the independent layout of green roof,permeable pavement,sunken greenbelt respectively,and the integration of three LID measures,about the control effect toward water quantity and water quality in various recurrence periods of rainstorm,providing a case study of a certain area.The research indicated that the four projects of LID played a significant role in holding up and cutting down the rainfall runoff and peak flow.From the most effective to the least respectively were the combination of LID measures,permeable pavement,sunken greenbelt,green roof,which sequence also applied to the control of total amount of pollutant discharge in water quality.%为量化评估低影响开发措施(LID)的控制效果,利用基于超渗产流原理、非线性水库汇流方法以及基于圣维南方程组的管道传输计算方法的SWMM模型,构建水生态小区低影响开发暴雨模型,以某小区为例,模拟评估了原始状态以及绿色屋顶、透水铺装、下沉式绿地单独布设和三种LID措施组合布设这五种方案在不同暴雨重现期下水量和水质的控制效果.研究发现,采取LID措施的四种方案对降雨径流和峰值流量都具有滞留削减作用,组合布设LID措施对径流的消减最为明显,其次是透水铺装和下沉式绿地,效果最弱的是绿色屋顶.在水质方面,控制污染物排放总量能力由大到小依次为组合LID措施、透水铺装、下沉式绿地、绿色屋顶.
展开▼
