甘南州夏河县“20230907”暴雨洪水调查分析  

Investigation and analysis of"20230907"torrential rain and flood in Xiahe County,Gannan Prefecture

作　　者：张燕 苟斌 ZHANG Yan;GOU Bin(Lintao Hydrometric Station in Gansu Province,Lintao 730500,China)

机构地区：[1]甘肃省临洮水文站,甘肃临洮730500

出　　处：《水利水电快报》2024年第4期27-30,共4页Express Water Resources & Hydropower Information

基　　金：甘肃省水利科学试验研究及技术推广项目(2020046047)。

摘　　要：为提高洪水防御水平,针对夏河县观音沟流域2023年9月7日(“20230907”)暴雨洪水展开了调查,分析了该场暴雨洪水的特性,确定洪水的洪峰流量、洪水总量及洪水重现期。利用曼宁公式、铁一院公式、推理公式等方法分析了该次洪水的特征值。结果表明:该场洪水是由观音沟流域上游局部暴雨导致,由于流域面积小、坡降大,从而形成产汇流历时短、流速快、峰量大的洪峰。该次洪水的洪峰流量为370 m^(3)/s,洪水重现期超100 a。In order to improve the flood defense level of Gannan Tibetan Autonomous Prefecture,a survey was carried out on the rainstorm flood in the Guanyingou Basin of Xiahe County on September 7,2023(20230907).The characteristics of the rainstorm flood were analyzed,and the peak flow,total flood volume and flood return period of the flood were determined.Manning formula,Tieyiyuan formula and inference formula were used to analyze the eigenvalues of the flood.The results showed that the flood was caused by local heavy rain in the upper reaches of Guanyingou Basin.Due to the small basin area and large slope,the flood peak with short duration,fast flow rate and large peak volume was formed.The peak flow of this flood was 370 m^(3)/s,and the flood return period was over 100 years.

关 键 词：暴雨洪水 洪水重现期 推理公式 观音沟流域 甘南藏族自治州 

分 类 号：TV122[水利工程—水文学及水资源]