摘要
城市排水管网是城市重要的基础设施和组成部分,是维持现代化城市正常运作的命脉。近年来,为了解决城市内涝的问题,各地加快了老旧管网改造的步伐。在前期基础资料收集和实际调研基础上,构建了徐州市某汇水区的排水SWMM模型,模拟分析了在不同重现期下(1、2、3、5 a)汇水区现状排水管网承载能力和内涝程度。结果表明,汇水区雨水管网排水能力有约48%满足1年一遇重现期,满足1~2年一遇重现期的占47%,满足2~3年一遇重现期的占2%,满足3~5年一遇重现期的占3%,满足大于5年一遇重现期的约占0。随着降雨重现期的增大,汇水区积水面积和积水深度也随着增加。其中,1年一遇重现期下,淹没区面积占4.12%,淹没深度大于0.2 m占0.71%;2年一遇重现期下,淹没区面积占5.51%,淹没深度大于0.2 m占0.94%;3年一遇重现期下,淹没区面积占7.02%,淹没深度大于0.2 m占1.08%;5年一遇重现期下,淹没区面积占8.45%,淹没深度大于0.2 m占1.28%。研究结果可为后期完善现状雨水管网和管网改造提供依据。
As a part of the city,urban drainage pipelines network is one of the important infrastructure,maintaining the normal operation of modern towns lifeline.In recent years,the pace of the old drainage network reconstruction has been accelarated to solve the problem of urban waterlogging.Based on the previous basic data collection and practical investigation,the SWMM drainage model of a runoff area in Xuzhou City was constructed to simulate and analyze the carrying capacity and waterlogging degree of current drainage network under different recurrence periods(1,2,3,5 a).The results showed that about 48%of the drainage capacity of the rainwater pipe network in the catchment area could meet the displacement requirement of one-year recurrence period.There was 47%of the drainage capacity of the rainwater pipe network meeting the displacement requirement of 1~2 year recurrence period,2%meeting the 2~3 year recurrence period,3%meeting the 3~5 year recurrence period,and about zero meeting over the five-year recurrence period.With the increase of rainfall recurrence period,the area and depth of water accumulation in catchment area were also increased.In the recurrence period of one-year,two-year,three-year,and five-year,the percentage of flooded area was 4.12%,5.51%,7.02%,and 8.45%,and the submerged depth greater than 0.2 m was 0.71%,0.94%,1.08%,and 1.28%,respectively.The research results can provide a basis for the later improvement for the present rainwater pipe network and the renovation of drainage network.
作者
李昂
刘加强
汪思颖
LI Ang;LIU Jiaqiang;WANG Siying(School of Environmental Engineering,Xuzhou Institute of Technology,Xuzhou221111,China)
出处
《净水技术》
CAS
2022年第11期121-126,共6页
Water Purification Technology
基金
徐州市重点研发计划(KC19218)。
关键词
降雨特性
SWMM
模型
重现期
管网评估
排水能力
rainfall characteristics
SWMM model
recurrence period
pipelines network evaluation
drainage capacity
