摘要
为研究城市雨洪规律及城市化对雨洪的影响,指导城市防洪排涝,以SWMM为研究工具,东莞市东城牛山汇水片区为研究对象,经过汇水子流域划分、管网系统概化、参数设置调试等步骤构建了研究区域的城市雨洪模型,并应用所构建的模型对不同降雨重现期、不同城市化程度设计情境进行了模拟研究。结果显示,所构建模型可以对城市雨洪过程进行全程动态模拟;模拟发现随着重现期的增加,径流总量和洪峰流量都明显增加,且增幅逐渐减小;随着城市化的发展,降雨入渗量减少,径流量和洪峰流量增大,径流系数不断增高,洪涝灾害的风险升高,且短重现期的降雨条件下影响更明显。
In order to study the laws of urban storm-flood and the influence of urbanization on storm-flood and guide urban flood control and drainage,the urban storm-flood simulation model for Niushan watershed in Dongguan city was established based on Strom Water Management Model（SWMM） through sub-catchment division,drainage network generalization and parameters setting and debugging and so on.The established model was applied in the simulation in the designed cases of different return periods and urbanization levels.The results show that the established model can be used in whole process of dynamic simulation of urban storm-flood.It is also concluded that with the increment of return period,the total runoff volume and peak flow increase significantly with gradual reduction of amplification;with the development of urbanization,rainfall infiltration decreases,the runoff,peak flow and runoff coefficient continuously increase,causing higher flood risk,which is more obvious with shorter return period of rainfall.
出处
《人民长江》
北大核心
2011年第4期50-53,共4页
Yangtze River
基金
国家水体污染控制与治理重大科技专项(2008ZX07211-006)
关键词
SWMM
城市雨洪模型
模拟研究
降雨重现期
城市化
SWMM
urban storm-flood model
simulation study
return period of rainfall
urbanization
