Author(s): Jie Mu; Minghua Chu; Fuxin Chai; Yesen Liu; Hongbin Zhang; Weihong Xu

Linked Author(s): Hongbin Zhang

Keywords: Dam break flood; Cascade reservoirs; Numerical model; Countermeasures

Abstract: The peak flow and velocity of dam break flood are much greater than that of rainstorm flood or snowmelt flood. If cascade dam break happens, it will induce a serious flood disaster and huge damage. Therefore, it is important to study the cause and process of cascade dam break floods. This paper carries out an analysis of the “75·8” dam break events of Banqiao reservoirs in Henan province, and the dam break events of Yongan and Xinfa reservoirs in Inner Mongolia in 2021. A refined two-dimensional hydrodynamic model, reservoir regulation model and dam break flow simulation model are constructed to explore the break process and mechanism of cascade dams. According to the analysis results, the countermeasures to prevent or reduce the impact of dam break are put forward, in order to provide decision support for the dam break defense of cascade reservoirs.

DOI: https://doi.org/10.3850/iahr-hic2483430201-237

Year: 2024