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Title: Numerical modelling of river embankment failure due to overtopping flow considering infiltration effects
Authors: Mizutani, Hideaki
Nakagawa, Hajime  kyouindb  KAKEN_id
Yoden, Toshiaki
Kawaike, Kenji  kyouindb  KAKEN_id
Zhang, Hao
Author's alias: 水谷, 英朗
Keywords: Erosion due to overtopping flow
river embankment
seepage flow
suction
unsaturated soil
Issue Date: 10-Sep-2013
Publisher: Taylor & Francis
Journal title: Journal of Hydraulic Research
Volume: 51
Issue: 6
Start page: 681
End page: 695
Abstract: This paper reports laboratory experiments and numerical simulations of river embankment failure due to overtopping flow for different sediment sizes and different saturation conditions of embankment body. The effects of saturation and sediment size of embankment materials on the erosion process are discussed based on the results of the laboratory experiments. A numerical model is proposed to simulate the erosion process of embankments by overtopping flows. The proposed model considered the effects of infiltration process and resisting shear stress due to suction of unsaturated sediment. To simulate the embankment erosion phenomenon, the numerical model consists of four modules: two-dimensional (2D) shallow-water flow, seepage flow, sediment transport using a non-equilibrium model framework, and 2D slope stability. The validity of the developed model is tested using experimental data on embankment erosion. The numerical results on progressive embankment erosion agree well with the results of the sandy river embankment experiments.
Rights: This is an Accepted Manuscript of an article published by Taylor & Francis in Journal of Hydraulic Research on 2013, available online: http://www.tandfonline.com/10.1080/00221686.2013.812151
This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
URI: http://hdl.handle.net/2433/197267
DOI(Published Version): 10.1080/00221686.2013.812151
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