Author(s): Huo Jian Liu, Yun Li, Xiao Gang Wang, Guo Xiang Xuan, Long Zhu
Linked Author(s): Huo jian Liu
Keywords: Cascade dam, dam break, superposition effect, overtopping break, experimental study
Abstract: Dam break could cause a significant disaster in the downstream, especially, cascade dam break would aggravate the disaster extent. This article presents an experimental study of the flood reinforcement due to cascade dam break in the glass flume, and opening speed of the gate is controlled for simulating different flood discharge hydrograph due to upstream dam break. In this article, the cascade dam break is divided into no-relationship type and relationship type. The experiment assumed that the downstream dam is suddenly broken due to overtopping in the relationship of cascade dam break, and the downstream dam is suddenly broken in a few seconds after the upstream dam break in the no-relationship of cascade dam break. The experimental results show that, the flood hydrograph induced by cascade dam break has some marked features at the downstream channel of the second dam compared to that induced by single dam break, such as higher peak water depth, fluctuated violently, multiple-peak, long duration. Also, there are some obvious differences on flood hydrograph between different cascade dam break types. The results can provide technical support for flood control management and flood control design of cascade dams
Year: 2017