Conference
Physical modeling of overtopping induced fluvial dike failure: effects of the channel flow and floodplain innundation
| العنوان: | Physical modeling of overtopping induced fluvial dike failure: effects of the channel flow and floodplain innundation |
|---|---|
| المؤلفون: | Rifai, Ismail, Erpicum, Sébastien, Archambeau, Pierre, Violeau, Damien, Pirotton, Michel, Dewals, Benjamin, Abderrezzak, Kamal el Kadi |
| المساهمون: | UEE - Urban and Environmental Engineering - ULiège |
| المصدر: | Proceedings of the 37th IAHR World Congress, 1573-1579 (2017-08); 37th IAHR World Congress, Kuala Lumpur, Malaysia [MY], 13-18 August 2017 |
| سنة النشر: | 2017 |
| مصطلحات موضوعية: | breach, floodplain plain confinement, fluvial dike, overtopping, subaqueous reconstruction, Engineering, computing & technology, Civil engineering, Ingénierie, informatique & technologie, Ingénierie civile |
| الوصف: | Fluvial dikes have been constructed as flood defense structures, but their failure may lead to casualties and major damages in the protected areas. Flow overtopping is listed as the main cause of dike failure. An accurate assessment of the breach evolution is a prerequisite to a sound flood risk assessment and management. in contrast, the current knowledge of the physical processes involved in fluvial dike failure by overtopping remains highly fragmented. This paper presents experimental tests on the breaching of homogenous sand-dikes in a fluvial configuration, i.e. the flow is parallel to the longitudinal dike axis. Overtopping is initiated over a pilot notch at the dike crest. Experiments are performed for different inflow discharges in the main channel and under different levels of floodplain confinement. The transient evolution of the dike geometry is monitored using a laser profilometry technique. The detailed reconstruction of the breach formation and expansion provides key insights into the mechanisms involved in the failure of fluvial dikes. Results show that the breach development differs highly from experiments disregarding the flow parallel to the dike axis (i.e. frontal configuration) as in the fluvial configuration the breach develops mainly in the flow direction and the floodplain water level strongly conditions the breach horizontal and vertical extent. |
| نوع الوثيقة: | conference paper http://purl.org/coar/resource_type/c_5794 conferenceObject peer reviewed |
| اللغة: | English |
| URL الوصول: | https://orbi.uliege.be/handle/2268/213600 |
| Rights: | restricted access http://purl.org/coar/access_right/c_16ec info:eu-repo/semantics/restrictedAccess |
| رقم الانضمام: | edsorb.213600 |
| قاعدة البيانات: | ORBi |
| الوصف غير متاح. |