平原水网区圩垸防洪引发的城市洪涝风险转移研究  

Study on Urban Flood Risk Transfer Caused by Polders for Flood Control in Plain River Network Areas

作　　者：王跃峰 崔婷婷[1] 许有鹏[3] 王强[3] WANG Yuefeng;CUI Tingting;XU Youpeng;WANG Qiang(Key Laboratory of Flood and Drought Disaster Control,Ministry of Water Resources,Nanjing Hydraulic Research Institute,Nanjing 210024,China;School of Geography and Tourism,Chongqing Normal University,Chongqing 401331,China;School of Geography and Ocean Science,Nanjing University,Nanjing 210023,China)

机构地区：[1]南京水利科学研究院水利部水旱灾害防御重点实验室,江苏南京210024 [2]重庆师范大学地理与旅游学院,重庆401331 [3]南京大学地理与海洋科学学院,江苏南京210023

出　　处：《人民珠江》2023年第7期17-26,共10页Pearl River

基　　金：水利部水旱灾害防御重点实验室开放基金项目(KYFB202112071046);国家自然科学基金项目(42201045);重庆市基础研究与前沿探索项目(cstc2021jcyj-msxmX0692);重庆市社会科学规划项目(2020QNGL26);重庆市教委科学技术研究项目(KJQN202100520)。

摘　　要：平原水网区圩垸建设改变了防洪排涝格局,引发的城市洪涝风险转移尚不清楚。综合运用城市洪涝耦合模拟与风险评估方法,通过典型洪水模拟分析,定量揭示了常州城区圩垸防洪引起的城市洪涝风险转移,提出了洪涝风险的协调方案。结果表明:①启用圩垸防洪使包围内淹没面积下降56%~64%、严重淹没(>1.0 m)面积下降70.2%,同时会加剧包围外南部和东部的洪涝灾害;②启用圩垸防洪加快了洪涝风险从城区向郊区的转移,使包围内4~5个子汇水区的洪涝风险下降超50%,而包围外南部和东部的3个子汇水区洪涝风险显著增加;③基于“风险共担”原则,将圩垸防洪启用的水位条件增加0~0.1 m,可作为今后常州防洪调度的备选方案。研究成果可为平原水网区的城市防洪减灾和洪水优化调度提供参考。The construction of polders in plain water network areas has changed the pattern of flood control and drainage,and the transfer of urban flood risks caused by it is still unclear.By comprehensively applying urban flood coupling simulation and risk assessment method,this paper quantitatively revealed the urban flood risk transfer caused by polders for flood control in Changzhou City and put forward the flood risk coordination scheme through typical flood simulation analysis.The results show that:①The use of polders for flood control reduces the inundated area by 56%~64%and the severely inundated area(>1.0 m)by 70.2%and aggravates the flood disaster in the southern and eastern parts of the enclosure;②the implementation of polders for flood control accelerates the transfer of flood risks from urban areas to suburbs,which can reduce the flood risk of 4~5 subcatchment areas within the enclosure by more than 50%,while the flood risk increases significantly in the three subcatchment areas in the southern and eastern parts of the enclosure;③according to the principle of risk sharing,the water level of polders for flood control is increased by 0~0.10 m,which can be used as an alternative scheme for Changzhou flood control dispatching in the future.The research results can provide a reference for urban flood control and disaster reduction and flood optimal dispatching in plain water network areas.

关 键 词：城市洪涝 风险转移 圩垸防洪 太湖流域 

分 类 号：P333.2[天文地球—水文科学]