汀江流域暴雨洪水特征及其关系分析OA

The study focuses on the Xikou Station,utilizing rainfall and flood data from 1964 to 2024.Indicators such as time variation coefficient,precipitation spatial moment,and flood concentration are selected to characterize the characteristics of rainstorm floods.Kendall rank correlation analysis is used to analyze the response relationship between rainstorm floods in the Tingjiang River.The results show that:①The frequency of floods with frontal rainfall patterns in the basin is higher than that of floods with typhoon rainfall patterns,and the magnitude of peak discharge is larger.②Rainstorms are characterized by short duration and high intensity,with the location of the rainstorm center exhibiting spatial randomness within the basin,often in a single-center pattern.③The flood characteristics of Xikou station have changed after the construction and operation of the Mianhuatan Reservoir,with reduced peak discharge and a more uniform flood process.④There is a relatively obvious nonlinear response relationship between flood characteristic values and the causing rainstorms.The study provides a scientific basis for flood control and dispatch in the basin.