System Elasticity & Key Point Identification of Urban Rainwater Pipe Network
To cope with the frequent occurrence of urban waterlogging caused by the continuous improvement of urbanization level,this paper takes an economic development zone in Xixian New Area in Xi'an,Shaanxi as the research object,uses SWMM software to establish the urban rainwater pipe network model,analyzes the current drainage capacity of the research area,and identifies the waterlogging prone nodes of the pipe network.Combining with the elastic analysis method,the quantitative formula of the elasticity of urban rainwater pipe network is constructed,the system performance and elastic change process under different return periods are analyzed,the elastic change of waterlogging prone nodes is discussed,and the key points of the elasticity of rainwater pipe network in the study area are selected.The results show that the runoff in the study area is sensitive to the change of small rainfall return period.When the rainfall return period exceeds 5 years,the regional waterlogging phenomenon is serious.The results show that the performance and elasticity of the system in the region decrease with the increase of return period,but they can return to the original level within 3 hours after rainfall,and the occurrence time of the lowest value of elasticity moves back with the increase of return period.The elastic key points in the study area are basically distributed in the upstream of the pipeline.
NETL
NSTL
万方数据
