钱塘江“20200707”洪水复盘及流域防洪风险研究  

Study on "20200707" flood review and flood control risk of Qiantang River Basin

作　　者：方子杰 仇群伊 陈玮 FANG Zijie;QIU Qunyi;CHEN Wei(Zhejiang Water Conservancy Development Planning Research Center,Hangzhou 310012,China)

机构地区：[1]浙江省水利发展规划研究中心,浙江杭州310012

出　　处：《人民长江》2022年第11期1-7,34,共8页Yangtze River

基　　金：浙江省水利科技项目(202133XH0004)。

摘　　要：浙江省钱塘江流域2020年经历了1949年以来历时第2长的梅汛期,新安江水库发生建库61 a以来最大洪水与最高水位,首次9孔全开泄洪。在浙江省对新安江水库实施精准调度并成功防御了流域性大洪水的背景下,系统性开展了“20200707”洪水复盘与风险模拟,分析了梅雨洪水累积效应所带来的流域防洪风险,评估了当前钱塘江流域防洪体系存在的薄弱环节。研究表明:钱塘江流域仍然存在发生100 a一遇流域性特大洪水的风险,新安江库区、兰江及富春江下游杭州市仍存在较大防洪风险。提出构建从源头到河口“江河湖海”一体化防御的流域防洪工程体系、研究谋划新安江水库功能调整、提升流域大中型水库防洪能力等系统治理措施。研究成果可为提高钱塘江流域防洪治理水平提供参考。In 2020,Qiantang River Basin in Zhejiang Province experienced the second longest plum rain season since 1949,leading to severe floods over the Xin anjiang Reservoir.Maximum flood and the highest water level occurred in the Xin anjiang Reservoir since its first impoundment of 61 years ago,its nine spillways were fully opened for the first time.Zhejiang Province implemented precise reservoir regulation and successfully prevented basin severe flood.Based on this,the flood review and risk simulation of"20200707"flood were systematically carried out,the basin flood control risk affected by the cumulative effect of plum rain flood was analyzed,and the weakness of flood control system in the Qiantang River basin was evaluated.The results show that the Qiantang River Basin still has the risk of a 100-year basin severe flood,and the Xin anjiang Reservoir area,Lanjiang River and Hangzhou City downstream of Fuchun River still have the flood risk.This paper proposes several comprehensive management measures,such as building an integrated basin flood control engineering system from the source to the estuary,researching the function adjustment of the Xin anjiang Reservoir,and increasing the flood control capacity of large and medium-sized reservoirs in the basin.The research results can provide a reference for improving the flood control level of the Qiantang River Basin.

关 键 词：“20200707”洪水复盘 洪水风险模拟 防洪对策 水库优化调度 钱塘江流域 

分 类 号：TV122[水利工程—水文学及水资源]