基于安全裕度理论的太湖流域北部城市排涝与区域防洪标准衔接研究  

Standard syntaxis of urban drainage and sub-basin flood standards based on safety margin theory in the north of Taihu Lake Basin

作　　者：李曦亭 王磊之 王银堂[2,3] 李伶杰 胡庆芳 揭仕青[4,5] LI Xiting;WANG Leizhi;WANG Yintang;LI Lingjie;HU Qingfang;JIE Shiqing(School of Civil Engineering,Tianjin University,Tianjin 300350,China;State Key Laboratory of Hydrology,Water Resources and Hydraulic Engineering&Science,Nanjing 210029,China;Yangtze Institute for Conservation and Development,Hohai University,Nanjing 210098,China;Fuhe Hydrology and Water Resources Monitoring Center,Fuzhou 344000,China;Jiangxi Province Key Laboratory of Poyang Lake Hydrology and Ecology Monitoring and Research,Fuzhou 344000,China)

机构地区：[1]天津大学建筑工程学院,天津300350 [2]南京水利科学研究院水文水资源与水利工程科学国家重点实验室,江苏南京210029 [3]河海大学长江保护与绿色发展研究院,江苏南京210098 [4]抚河水文水资源监测中心,江西抚州344000 [5]鄱阳湖水文生态监测研究重点实验室,江西抚州344000

出　　处：《河海大学学报（自然科学版）》2023年第2期150-156,共7页Journal of Hohai University(Natural Sciences)

基　　金：国家重点研发计划(2021YFC3000101-02);国家自然科学基金(52109028);江苏省自然科学基金(BK20210042);江苏省博士后科研资助计划(2020Z060)。

摘　　要：提出了基于水位安全裕度理论的太湖流域北部城市排涝与区域防洪标准衔接方法,剖析现状城市排涝与区域防洪标准的衔接性,并通过不同标准组合方案的试算,分析了区域和城市防洪排涝标准变化对关键断面出入水量的影响,并基于水位安全裕度评估方法提出了相衔接的城市排涝标准与区域防洪标准设计组合。研究结果表明:现状太湖流域北部区域防洪与城市排涝标准基本具备抵御50年一遇洪水的能力,但城市、区域层面防洪排涝能力与需求表现出不衔接,表现为城市内部水位远低于防洪设计水位,而区域水位则接近甚至超出防洪设计水位,防洪能力略显不足;不同区域防洪标准提升导致的外排格局变化特征具有显著差异,武澄锡虞区、阳澄淀泖区防洪能力提升通过扩大向长江泄洪实现,湖西区则通过扩大向太湖泄洪实现;限制城市大包围外排水量对缓解城市外部区域防洪压力的效果有限;太湖流域北部50年一遇区域防洪标准与20年一遇城市排涝标准是相衔接的标准设计组合。A method of standard syntaxis of the flood control and drainage based on the theory of water level safety margin is constructed,and the northern part of the Taihu Lake Basin is used as the study area to analyze the cohesion between the sub-basin flood and urban drainage standards.Through the trial calculation of different simulation schemes,the effect of changes of sub-basin flood and urban drainage standards on the inflow and outflow volume in key sections is analyzed,and the design combination of sub-basin flood and urban drainage standards is proposed based on the evaluation method of water level safety margin.The results indicate that the current sub-basin flood and urban drainage standards of the northern part of the Taihu Lake Basin basically can resist the flood with a return period of 50-year.However,the capacity and demand of flood control and drainage at the sub-basin and urban are incohesion,which shows that the water level in the urban is far lower than the flood control design water level,while the sub-basin water level is close to or even higher than the flood control design water level and even slightly higher than its flood control capacity.There are significant differences in the characteristics of changes in the flood discharge pattern caused by the improvement of flood control standards in different sub-basins.The flood control capacity of Wuchengxiyu District and Yangchengdianmao District is improved by expanding the flood discharge to the Yangtze River,while the Huxi District is profited by expanding flood discharge to the Taihu.Limiting the discharge volume of polder of urban has limited effect on alleviating the flood control pressure in the external area of urban.Finally,the sub-basin flood standard with a return period of 50-year and the urban drainage standard with a return period of 20-year in the north of Taihu Lake Basin are the design combination of standard syntaxis.

关 键 词：标准衔接 安全裕度 区域防洪 城市排涝 水文水动力模型 太湖流域 

分 类 号：P333.2[天文地球—水文科学]