Author(s): Chen Zhaohe; Sun Ying; Li Qijun

Linked Author(s):

Keywords: Risk analysis; Overtopping; Earth dam; Flood control reservoir

Abstract: It should be ensured that the dam is safe during flood period. Among the dam failures around the world, the failures of earth dam are in the majority, whereas the majority of earth dam failures are initiated from overtopping and thereby dam break. The research on applying overtopping risk analysis technique to the safety evaluation against overtopping and increasing the benefits of flood-control reservoirs is described in this paper. Considering thoroughly the uncertainties of flood, wind, reservoir storage and discharge capacity, the authors developed the theory of overtopping risk against the design series of flood and wind simultaneously. A risk criterion or an acceptable risk of overtopping was also recommended by the authors. In the paper, particular emphasis was paid on the applications of the overtopping risk theory to Douhe Reservoir, Qinghe Reservoir, Yuecheng Reservoir and Zhuzhuang Reservoir as well as the increasing of their economic benefits as the meanwhile the dams are safe during flood with their reliability against overtopping of 99.999% or more. Wide spread of the technique of overtopping risk analysis will bring us remarkable economic and social benefits.

DOI:

Year: 2001