Articles | Volume 16, issue 7
Nat. Hazards Earth Syst. Sci., 16, 1541–1551, 2016
https://doi.org/10.5194/nhess-16-1541-2016
Nat. Hazards Earth Syst. Sci., 16, 1541–1551, 2016
https://doi.org/10.5194/nhess-16-1541-2016
Research article
04 Jul 2016
Research article | 04 Jul 2016

Overtopping breaching of river levees constructed with cohesive sediments

Hongyan Wei et al.

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Short summary
Mechanisms, such as flow shear erosion, impinging jet erosion, side slope erosion and cantilever collapse, were discovered in the overtopping breaching process of cohesive levees. The levee breaching flow rates were simulated by a depth-averaged 2-D flow model. The calculated overflow rates can be well expressed by the broad-crested weir flow formula. The deduced discharge coefficient was smaller than that of common broad-crested rectangular weirs.
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