Plane dike-breach due to overtopping: effects of sediment, dike height and discharge

Due to increased flood discharges during the past years, overtopping of dikes and earthen embankments has caused large damages to the surrounding infrastructure and the environment. Despite the numerous dike breaches and the high damage potential, the dike-breach process is still only poorly understood. Therefore, hydraulic model tests were conducted to investigate the main features of the plane dike-breach due to overtopping. The temporal dike-breach progress was optically recorded allowing for a detailed analysis of the sediment and water surfaces. The results indicate a decisive effect of the sediment diameter on the breach process. A systematic variation of the dike dimension, the sediment diameter and the inflow discharge resulted in basic findings relative to the breach discharge and the dike degradation. The governing parameters of this dike-breach process include the dike height, the grain size and the critical flow depth.

[1]  Somchai Wongwises,et al.  Embankment dam breach and its outflow characteristics , 2004 .

[2]  Stephen E. Coleman,et al.  Overtopping Breaching of Noncohesive Homogeneous Embankments , 2002 .

[3]  M. Morris.  Breaching Processes: A state of the art review , 2009 .

[4]  Andrey Leonidovich Rozov,et al.  Modeling of washout of dams , 2003 .

[5]  Volker Weitbrecht,et al.  Breaching of overtopped river embankments controlled by apparent cohesion , 2011 .

[6]  David C. Froehlich,et al.  Peak Outflow from Breached Embankment Dam , 1989 .

[7]  Benjamin Dewals,et al.  Experimental and numerical study of the breaching of an embankment dam , 2007 .

[8]  J. K. Vrijling,et al.  BREACHING OF DIKES , 2007 .

[9]  D. M. Temple,et al.  Mechanics of Overflow Erosion on Embankments. II: Hydraulic and Design Considerations , 1989 .

[10]  Stefano Lanzoni,et al.  Laboratory Experiments on the Failure of Coarse Homogeneous Sediment Natural Dams on a Sloping Bed , 2010 .

[11]  Benjamin Dewals,et al.  Experimental and numerical investigations of dike-break induced flows , 2009 .

[12]  Lukas Schmocker.  Hydraulics of dike breaching , 2011 .

[13]  Willi H. Hager,et al.  Effect of Weir Face Angles on Circular-Crested Weir Flow , 2011 .

[14]  Chaiyuth,et al.  FLOW PATTERNS AND DAMAGE OF DIKE OVERTOPPING , 2003 .

[15]  Tae-Hyung Kim,et al.  Tensile Strength of Unsaturated Sand , 2009 .

[16]  Willi H. Hager,et al.  Modelling dike breaching due to overtopping , 2009 .

[17]  Hubert Chanson.  Overtopping Breaching of Noncohesive Homogeneous Embankments , 2004 .