Primary Study on Overtopping Erosion of Non-Viscous Embankment and Assessment of Discharge through Breach

Abstract:

Combined with the flume experiments and 1D unsteady flow numerical model, the paper has investigated the overtopping breach process of the non-viscous embankment. The breach expansion and the variation process of water level above the breach gate have been studied by series of experiments. Considering the difficulty to monitor the discharge through the breach, 1D unsteady flow numerical model has been applied to simulate discharge variation process. It is found that the width of breach gate and water level above the breach gate are the two key factors which influence the discharge through the breach significantly. Discharge variation process through the breach gate is consistent with the flow rule of side weir. The calibrated flow coefficient is from 0.389 to 0.696. The investigation results can provide scientific basis for disaster prevention and evaluation of embankment burst.

• Periodical: Advanced Materials Research (Volumes 383-390)
• Pages: 3909-3916
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.383-390.3909
• Online since: November 2011
• Authors: Ming Hui Yu, Yan Jie Liang
• Keywords: Discharge Process, Flow Coefficient, Non-Viscous Embankment, Overtopping Breach

References

[1] Fread, D L. DAMBRK., The NWS dam break flood forecasting model, Phil. Silver Spring : National Weather Service (NWS) Report, NOAA , (1984).

[2] Fread, D L. A Breach Erosion Model for Earthen Dams, A Breach Erosion Model for Earthen Dams, Silver Spring : National Weather Service (NWS) Report , NOAA , (1984).

[3] Fread D L, Lewis J M, NWS FLDWAV model, Maryland: National Weather Service, (1998).

[4] EE Alonso, A Gens – Géotechnique, Aznalcollar dam failure. Part1: Field observations and material properties, Geotechnique, 2006, Vol. 56, pp.165-183.

DOI: 10.1680/geot.2006.56.3.165

[5] Alonso, E. E, Gens, A, Aznalcollar dam failure. Part 3: Dynamics of the motion, Geotechnique, 2006, Vol. 56 , pp.203-210.

[6] LUKAS SCHMOCKER, WILLI H. HAGER, Modelling dike breaching due to overtopping, Journal of Hydraulic Research, 2009, Vol. 47, pp.585-597.

DOI: 10.1080/00221686.2010.492097

[7] PAUL KAMRATH, MARKUS DISSE, MATTHIAS HAMMER, Assessment of Discharge through a Dike Breach and Simulation of Flood Wave Propagation, Natural Hazards, 2006, 38, pp.63-78.

DOI: 10.1007/s11069-005-8600-x

[8] HUANG Jin-chi, HE Xiao-yan., Unified 2-D numberical model for simulating dam break wave propagation, Journal of Hydraulic Engineering, 2006, Vol. 37, pp.222-226. (in chinese).

[9] ZHANG Jian-guo, WANG Cheng, XU Xue-jun, Numerical simulation for discharge at the breaches of Tangjiashan Dammed Lake, Yangtze river. 2009, Vol. 40, pp.60-62. (in chinese).

[10] P.J. Visser, ZHU Yong-hui Model for breach growth in noncohesive soil dikes, Journal of Yangtze River Scientific Reseach Institute, 2003, Vol. 20, pp.35-38. (in chinese).

[11] LI Wei, XU Xiao-ping, Hydraulics. Wuhan University of Hydraulic and Electric Press, 2000, p.297. (in chinese).