摘要
在城市内涝频发的背景下,对城市地区的排水防涝风险进行正确评估至关重要。构建了张家港城市排水防涝SWMM模型。根据排水系统与排涝系统的不同需求,推求出适用于城市排水防涝系统的综合设计雨型,将此设计雨型作为上边界输入模型中,绘制了5年一遇、10年一遇和20年一遇的内涝积水深度和积水时间图。运用指标体系法,根据内涝积水深度、积水时间和所在地敏感性定义了排水防涝风险级别,绘制了不同重现期的内涝风险图并分析了易涝原因。结果显示,张家港市大部分地区是内涝产生的低风险区;人员密集的老城市产生涝灾的风险较大;随着暴雨重现期的不断增大,张家港市内受灾范围不断加大,受灾等级也不断提高。为其他城市进行排水防涝风险的评估、完善排水防涝体系提供思路。
Under the frequent waterlogging disasters in urban area,it is important to evaluate its risk of drainage and flood prevention.This paper constructed drainage and flood prevention based on SWMM in Zhangjiagang,and proposed the integrated rainfall pattern that is suitable for urban drainage systems based on the different needs of drainage systems.taking it as the upper boundary to apply in the model,then drawing the depth and return period maps of water accumulation distribution of 5,10 and 20 years respectively.Besides,this paper applied an index system method to define the risk levels of drainage and flood control according to the depth of inland water,the time of water accumulation,and the sensitivity of the location,and drew the waterlogging risk map of different return periods,then analyzed its causes.The results indicate that the risk grade is low in most regions of Zhangjiagang City while it is high in crowded areas.The disaster classification and area upgrade with the increase of rainfall in Zhangjiagang City.
作者
吴沛霖
俞芳琴
王婷
刘俊
WU Peilin;YU Fangqin;WANG Ting;LIU Jun(College of Hydrology and Water Resources,Hohai University,Nanjing 210098,China;Pukou District Water Authority of Nanjing City,Nanjing 211800,China;Qinhuangdao Hydrology and Water Resources Survey Bureau,Qinhuangdao 066000,China)
出处
《水文》
CSCD
北大核心
2020年第2期31-37,共7页
Journal of China Hydrology
基金
国家自然科学基金项目(41471015)。
关键词
城市排水防涝
风险评估
SWMM模型
综合雨型
urban drainage and flood control
risk assessment
SWMM model
integrated rain pattern
作者简介
吴沛霖(1994-),女,广西南宁人,硕士研究生,研究方向为城市防洪与排水。E-mail:palince@qq.com;通讯作者:刘俊(1968-),男,安徽当涂人,博士,教授,博导,研究方向为城市防洪与减灾.E-mail:ljhohai@163.com。
