IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Flood risk management and adaptation : Dam breaching models: testing the influence of the erosion parameters
Dam breaching models: testing the influence of the erosion parameters
Earthen dams can be overtopped during extreme events that reach flow discharges above the design discharge.
Breaching models can simulate the erosion of the embankment and can be coupled with 1-D or 2-D shallow water
equations for propagating the dam break wave. Alternatively, sediment transport models can be used for both
processes. In order to evaluate the influence of the choice of the model and of the main parameters of each model, two
series of tests are used. The first ones concern one field test including a 6 m high embankment; the second ones deal
with laboratory experiments in which the embankment height is about 0.6 m. Comparing the flow hydrograph at breach
site, the higher differences come from the calculation method of the erosion rate or more simply from the value of the
erosion coefficient. However, for the selected experiments, these differences are essentially outside the period with high
velocities which means that the peak discharges are very similar and that the main differences are found in the
evolution of the breach shape leading, for instance, to very different final breach widths.
File Size : 557,457 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Flood risk management and adaptation
Date Published : 18/08/2015
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