“22.6”西北江及三角洲洪水分析研究  

Analysis of Xijiang River and Beijiang River Delta during“June 2022”Flood

作　　者：林璐 邹宇 LIN Lu;ZOU Yu(Jiangmen Hydrological Branch,Hydrology Bureau of Guangdong Province,Jiangmen 529030,China)

机构地区：[1]广东省水文局江门水文分局,广东江门529030

出　　处：《广东水利水电》2025年第2期13-19,共7页Guangdong Water Resources and Hydropower

摘　　要：该文分析了“22.6”西北江及三角洲洪水的暴雨时空分布、洪水组成及特点、洪水分流比,并与历史洪水对比。分析表明:“22.6”洪水具有编号洪水同时发生、历时长、量级大、退水慢、超警时间长等特点;西江3号洪水与北江1号洪水历时3 d,西江4号洪水与北江2号洪水历时7 d,北江2号洪水为仅次于1915年的特大洪水,北江干流飞来峡水库最大入库流量19 900 m~3/s,超100年一遇;北江干流水道三水站超警时间101 h,西江干流水道马口站超警时间63 h,平均退水率均为0.02 m/h;思贤滘的调节作用使得西江马口、北江三水的洪水分流比稳定在3∶1;北江“22.6”洪水量级大于“08.6”、“05.6”洪水,西江洪水量级明显偏小。此次洪水过程中,水工程的联合调度有效避免了西北江洪水正面遭遇,确保了珠三角城市群的防洪安全,研究成果可为今后西北江及珠江三角洲洪水预报和科学防御提供借鉴。This paper analyzes the spatial and temporal distribution of rainstorm,flood composition and characteristics,and flood diversion ratio of the“June 2022”flood in the northwest river and delta,and compares it with historical floods.The analysis shows that the flood has the characteristics of simultaneous occurrence of numbered floods,long duration,large magnitude,slow recession,and over alarm time.The No.3 flood in the Xijiang River and the No.1 flood in the Beijiang River lasted for 3 days,while the No.4 flood in the Xijiang River and the No.2 flood in the Beijiang River lasted for 7 days.The No.2 flood in the Beijiang River is the second largest flood after 1915.The maximum inflow of Feilaixia Reservoir on the main stream of Beijiang is 19900m3/s,which is more than once every 100 years.The alarm time at Sanshui Station on the main stream of Beijiang River is 101 hours,and the alarm time at Makou Station on the main stream of Xijiang River is 63 hours,with an average water return rate of 0.02m/h.The regulating effect of Sixianjiao stabilizes the flood diversion ratio of the Xijiang Makou and Beijiang rivers at 3∶1.The magnitude of the“June 2022”flood in Beijiang is greater than that of the“June 2008”and“June 2005”floods,while the flood magnitude of the Xijiang River is significantly smaller.During the flood process,the joint operation of water engineering effectively avoided the direct flooding encounter directly the Northwest River,and ensured the flood control safety of the Pearl River Delta urban agglomeration.The study can provide some reference for future flood forecasting and scientific defense of the Xijiang and Beijiang River and the Pearl River Delta.

关 键 词：“22.6”洪水 暴雨分析 洪水组成 洪水分流比 西北江及三角洲 

分 类 号：TV122.1[水利工程—水文学及水资源]