摘要
Abstract
With the continuous deterioration of the ecological environment and the increasing frequency of rainstorm,rainstorm and flood disasters pose a great challenge to the operation of urban drainage system.The existing drainage system in the city is unable to meet the drainage needs,which not only causes huge flood control pressure in downstream areas,but also easily leads to serious waterlogging.The research on urban rainstorm waterlogging simulation can provide an important theoretical basis for urban disaster prevention and mitigation and drainage planning and design.This paper builds a storm water management model(SWMM)based on the rainfall,underlying surface,and pipe network data of a certain area in Xi'an,analyzes the 3 h rainfall process under the 3,5,and 50 year return period conventional rainfall,effectively evaluates the pipeline overload and drainage capacity under the corresponding return period rainfall in the area,and on this basis,conducts the application research of low impact development(LID)facilities.The results show that the pipeline overload increases with the increase of rainfall,and the highest is 60%under the condition of 50-year rainfall;the drainage capacity of the pipe network in the area is not high,and the waterlogging risk increases with the increase of rainfall,the maximum is 44%;after the biological detention pool is designed,the waterlogging risk is reduced by more than 40%.关键词
暴雨管理模型/管道超载/内涝风险/生物滞留池/市政Key words
rainstorm management model/pipeline overload/waterlogging risk/biological detention pool/municipal public works分类
建筑与水利
