A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The Technical Advisory Committee on Water Defenses (TAW) in The Netherlands has decided in 1990 to replace the present design method for dikes based on a frequency of exceedance of the water level by an inundation risk approach. In this method safety levels will be expressed in terms of risks. Risk is here defined as the product of the probability of inundation and the expected damage caused by the inundation. It is necessary to predict the rate of inundation of the polder in order to be able to estimate this damage. This inundation rate depends heavily on the flow rate through the breach in the failing dike, which in turn depends on the development of the breach in time. Hence, it is necessary to have a reliable dike breaching model. In this thesis a mathematical model is described for the growth of the breach in a failing dike and for the inflow rate through the breach. It is assumed that the dike has been constructed with sand and that the clay-layers and the revetments on the slopes do not decelerate the erosion process.
The Technical Advisory Committee on Water Defenses (TAW) in The Netherlands has decided in 1990 to replace the present design method for dikes based on a frequency of exceedance of the water level by an inundation risk approach. In this method safety levels will be expressed in terms of risks. Risk is here defined as the product of the probability of inundation and the expected damage caused by the inundation. It is necessary to predict the rate of inundation of the polder in order to be able to estimate this damage. This inundation rate depends heavily on the flow rate through the breach in the failing dike, which in turn depends on the development of the breach in time. Hence, it is necessary to have a reliable dike breaching model. In this thesis a mathematical model is described for the growth of the breach in a failing dike and for the inflow rate through the breach. It is assumed that the dike has been constructed with sand and that the clay-layers and the revetments on the slopes do not decelerate the erosion process.
Breach Growth in Sand-Dikes
P. J. Visser (author)
1998
190 pages
Report
No indication
English
| UB Braunschweig | 1998
| TIBKAT | 1998
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| ASCE | 1999
Experimental investigation of the breach growth process in sand dikes
| British Library Conference Proceedings | 2004