基于暴雨洪水管理模型的下凹绿地和透水路面模拟研究

以南京某小区为研究区域,采用暴雨洪水管理模型,模拟研究区域进行下凹绿地和透水路面改造后对区域内地面径流情况的影响。模拟结果表明,下凹绿地和透水路面均可有效消减地面总径流量和峰值流量,减小径流系数,同时改善研究区域的地下水环境。通过进一步改变下凹绿地和透水路面在模型中的规模后可知:下凹绿地面积占小区总面积的比例不应低于30%;透水路面面积占总面积的比例不应低于20%。

Research on simulation of sunken lawn and porous pavement based on management model of storm and flood

Taking a district in Nanjing as study area, using the management model of storm and flood, the paper studied the effect reconstruction of sunken lawn and porous pavement on surface runoff in study region. The simulation results showed that both concave down greenbelt and permeable pavement can effectively reduce the total surface runoff, peak flow and runoff coefficient, meanwhile it can improve the environment of groundwater in study regional. Through changing the scale of sunken lawn and porous pavement in the model, the conclusion was gotten that the ratio of the sunken lawn area to total area shall not be less than 30%; the ratio of the porous pavement area to total area shall not be less than 20%.