Articles | Volume 16, issue 7
Research article
04 Jul 2016
Research article |  | 04 Jul 2016

Overtopping breaching of river levees constructed with cohesive sediments

Hongyan Wei, Minghui Yu, Dangwei Wang, and Yitian Li

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Cited articles

Briaud, J. L., Chen, H. C., Govindasamy, A. V., and Storesund, R.: Levee erosion by overtopping in New Orleans during the Katrina Hurricane, J. Geotech. Geoenviron., 134, 618–632, 2008.
Coleman, S. E., Andrews, D. P., and Webby, M. G.: Overtopping breaching of noncohesive homogeneous embankments, J. Hydraul. Eng., ASCE, 128, 829–838, 2002.
Dou, S. T., Wang, D. W., Yu, M. H., and Liang, Y. J.: Numerical modeling of the lateral widening of levee breach by overtopping in a flume with 180° bend, Nat. Hazards Earth Syst. Sci., 14, 11–20,, 2014.
Fukuoka, S.: Erosion processes of natural river bank, in: Proceedings of the 1st International Symposium on Hydraulic Measurement, Beijing, China, 223–229, 1994.
Hager, W. H. and Schwalt, M.: Broad-crested weir, J. Irrig. Drain. E., 120, 13–26, 1994.
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.
Final-revised paper