城市绿地空间分布对雨水径流量的影响

文章针对不同城市绿地空间分布方案,构建相应的一维管网排水模型,对比不同降雨重现期下的地表径流和管网动态存储量模拟结果,分析不同绿化占地比率和绿地空间格局对雨水地表径流及排放的影响。结果表明,雨水径流与地块的绿化占地比率呈现高度相关,绿地的空间格局对雨水径流的影响并不显著,绿地空间布局和管网的匹配程度会影响管道内的动态储水量。该研究可为城市绿地的空间布局规划提供支撑。

Effects of Spatial Layout of Urban Green Space on Rainwater Runoff

Based on different spatial layout schemes of urban green space,the corresponding onedimensional pipe network drainage model is built up,and the effects of different greening rates and spatial patterns of green space on surface runoff and discharge of rainwater are studied by comparing surface runoff with the simulation results of pipe network dynamic storage under different rainfall recurrence periods.The results indicate that rainwater runoff is highly correlated with the greening rate of plots.The spatial pattern of green space has little significant effect on rainwater runoff,and the matching degree of green space layout and pipe network will affect the dynamic water storage in pipeline.From the perspective of spatial layout,this paper studies the relationship between urban green space and rainwater runoff,and provides the support for the spatial layout planning of urban green space.