Author(s): Sebastián Guillén-Ludeña, Diego Lopez, Nicolas Riviere, Emmanuel Mignot
Linked Author(s): Emmanuel Mignot
Keywords: Bed friction, drag force, flood plain, friction coefficient, laboratory experiments
Abstract:
During extreme flood events, the land occupation in floodplains becomes a major issue as it highly influences the flow resistance and the hydrodynamic processes. The present work aims at identifying the land occupation (number of emerging obstacles) increment on the evolution of the relative magnitude of resistance forces acting on the flow. The resistance forces are those corresponding to the bed friction and to the drag induced by the obstacles. Firstly, we characterize the transition from a flow governed mostly by bed-friction forces to a flow governed mostly by drag forces. Secondly, we quantify the evolution of the bed friction and obstacle drag resistance coefficients as the number of obstacles increases.
(2649, 62, 308)
Year: 2017