Author(s): Wang Haowen; Zhang Xiaoxiang; Zhang Kejian; Xu Hao; Ma Qiang; Yang Xuejun

Linked Author(s): Qiang Ma

Keywords: “23•7” catastrophic flood; Digital twin watershed; Distributed hydrological model; Modelling platform; Modelling strategy

Abstract: The climate change and the increase of human activities had continuously improved the complicity of flood disaster. By setting up the digital twin flood prevention platform, local managers will have more chances to deeply understand the real-time disaster mechanism and its future process. Taking the "23·7" catastrophic flood of Yongding River Basin as an example, this paper uses the Chinese distributed hydrological model and IFMS 2D flood simulation software, different models with various spatial precision were constructed to simulate the flood in three parts of the basin. The modelling analysis indicates that the Guanting-Shanxia area is the main flow generation area during this flood event, with obviously higher rainfall-runoff coefficient than other areas of the catchment. The model applied in this study is able to represent the quantity of different flood components. And the modelling strategy applied in this study can efficiently represent the flood process in detail in time and space. All simulation run for 30 days’ flood can been finished in 5mins. The hydroinformatics application presented in this study can be used as a technical reference to guide the implemented digital twin watershed in other river basins.

DOI: https://doi.org/10.3850/iahr-hic2483430201-250

Year: 2024