基于数值模拟的下凹式绿地径流控制效应研究  

Study on the effect of runoff control in the concave herbaceous fieldbased on numerical simulation

作　　者：祝新宇 袁映炜 霍志国 陈社明 张茜 Zhu Xinyu;Yuan Yingwei;Huo Zhiguo;Chen Sheming;Zhang Qian(College of Water Conservancy Engineering,Tianjin Agricultural University,Tianjin 300392,China;Tianjin Center,China Geological Survey,Tianjin 300170,China)

机构地区：[1]天津农学院水利工程学院,天津300392 [2]中国地质调查局天津地质调查中心,天津300170

出　　处：《天津农学院学报》2024年第3期69-77,共9页Journal of Tianjin Agricultural University

基　　金：国家级大学生创新创业训练计划项目(202110061018);国家自然基金项目(41907149);中国博士后科学基金面上项目(2018M631732)。

摘　　要：下凹式绿地是海绵城市建设中的重要低影响开发(Low Impact Development,LID)设施之一。选择下凹式绿地作为典型研究对象,基于三维数值模型模拟下凹式绿地的径流控制过程,根据适用于短历时设计降雨分析的芝加哥雨型公式计算降水过程线和径流总量,研究不同重现期下LID设施节点溢流削减量变化,结果表明:随着降雨重现期的增加,LID设施节点溢流削减量逐渐升高;不同重现期2年、10年、30年下,LID节点溢流削减率逐渐降低,峰值流量时间延缓率分别为58.79%、64.27%、77.46%。下凹式绿地可以有效减少研究区域内由于降雨事件导致的节点溢流现象,降雨重现期越小,溢流现象改善状况越好。The concave herbaceous field is one of the important Low Impact Development(LID)facilities applied in sponge city construction.Concave herbaceous field was selected as the typical research object,the runoff control process of concave herbaceous field was simulated based on the three-dimensional numerical model,the precipitation process line and the total runoff amount were calculated according to the Chicago rain pattern formula suitable for short-duration design rainfall analysis,and the overflow reduction changes of LID facility nodes under different recurrence periods were studied.The results showed that with the increase of rainfall recurrence period,the overflow reduction of LID facilities gradually increased.Under different recurrence periods of 2a(a,year),10a and 30a,the overflow reduction rate of LID nodes gradually decreased,and the delay rate of peak flow time was 58.79%,64.27%and 77.46%,respectively.Concave herbaceous field can effectively reduce the node overflow phenomenon caused by rainfall events in the study area.The smaller the rainfall recurrence period,the better the improvement of overflow phenomenon.

关 键 词：海绵城市 数值模拟 低影响开发 下凹式绿地 重现期 径流控制 

分 类 号：TU985.12[建筑科学—城市规划与设计]