Author(s): Shiyun Lin; Jiali Guo; Shan-e-hyder Soomro; Yinghai Li

Linked Author(s):

Keywords: Catchment characteristics; Hydrological models; Yangtze River

Abstract: Due to the heterogeneity of climatic and underlying variables of different catchments and the limited description of present hydrological models for hydrological processes, it is necessary to select an appropriate model for flooding simulation based on the actual conditions of the interested basins. In this research, three hydrological models with different structures were selected for different types of catchments within the Yangtze River Basin. Various indicators were extracted and analyzed to explore the impact of catchment characteristics on the hydrological effects of small and medium-sized catchments. The research results show that: When there are differences in climatic zones within the catchment, variations in rainfall patterns become most apparent. In contrast, in similar climatic zones, topography has a more pronounced impact on the catchment's flow characteristics. In catchments with significant topographic variations, the development of aquifers tends to be weaker, resulting in rapid fluctuations in water levels and quick responses to floods within the catchment. Vegetation retention in the catchment has a limited impact on smaller regions, and differences in soil composition contribute to variations in runoff components within the catchment.

DOI: https://doi.org/10.64697/HIC2024_P372

Year: 2024