Recherche documentaire
Trier par :
-
Berni, C. / Michallet, H. / Barthelemy, E. - 2017We report on new experiments designed to investigate bed destabilization processes in a two-dimensional wave flume physical model of a beach. The mobile bed consists of non-cohesive granular material of low density. The wave conditions are provided by repeating a cycle of waves made of two...Contributeur (s):
-
Perret, E. / Berni, C. / Herrero, A. / Camenen B. / El kadi Abderrezzak, K. / Buffet, A. - 2017A very large scatter has been observed for the incipient motion threshold of a gravel bed in lit-erature, which can be explained by a lack of bed surface characterization. In the present work, a laser scan-ning technique is used and criteria to describe the bed surface are proposed in order to...Contributeur (s):
-
Dupuis, V. / Proust, S. / Berni, C. / Paquier, A. - 2017Flows in a compound open-channel (two-stage geometry with a main channel and adjacent floodplains) with a longitudinal transition in roughness over the floodplains are experimentally investigated in an 18 m long and 3 m wide flume. Transitions from submerged dense vegetation (meadow) to emergent...Contributeur (s):
-
Dupuis, V. / Proust, S. / Berni, C. / Paquier, A. - 2017This laboratory study aims at investigating the longitudinal development of a mixing layer in a compound open-channel (two-stage geometry with a main channel and adjacent floodplains). The floodplains are covered with two roughness types: either a bed roughness representing a submerged dense meadow...Contributeur (s):
-
Berni, C. / Herrero, A. / Camenen, B. - 2016/ River habitats are among the most important environmental issues at stake in recent years. Indeed, they have a strong impact on biodiversity. The numerous structures that are built in rivers such as dams, hydroelectric plants, dikes, etc. have dramatically changed the sediment dynamics in some...Contributeur (s):
-
Berni, C. / Suarez, L. / Michallet, H. / Barthelemy, E. - 2016This study investigates the non-linearities of wave boundary layers in the surf zone. It mainly focuses on the acceleration skewness or asymmetry. Experiments [e.g. Grasso et al., 2011] show that asymmetry influences the sediment transport. Its influence lies in the fact that asymmetry in velocity...Contributeur (s):
-
Herrero, A. / Berni, C. - 2016Fine sediment infiltration into a river bed is a physical process affected by different human actions and has several environmental, socioeconomic, and river morphology consequences. A theoretical model is proposed herein aiming to reproduce the fine sediment content depth profile resulting from...Contributeur (s):
-
Camenen, B. / Perret, E. / Herrero, A. / Berni, C. / Thollet, F. / Buffet, A. / Dramais, G. / Le Bescond C. / Lagouy M. - 2016Estimating the fine sediment budget in alpine rivers is an important challenge to better understand the morphodynamics of such rivers. This paper presents some first in-situ experiments describing the evolution of a fine sediment deposit over a gravel bar during a flushing event. Some modelling and...Contributeur (s):
-
Proust, S. / Berni, C. / Boudou, M. / Chiaverini, A. / Dupuis, V. / Faure, J.B. / Paquier, A. / Lang, M. / Guillen Ludena, S. / Lopez, D. / Mignot, E. / Riviere, N. / Chagot, L. / Rouzes, M. / Moulin, F. / Goutal, N. / Oukacine, M. / Peltier, Y. / Ferreira, R.M.L. / Brito, M. / Alves, E. / Gymnopoulos, M. / Leal, J.B. / Mathurin, B. / Soarez Frazao, S. / Bousmar, D. / Fernandes, J.N. / Eiff, O. - 2016Flood hazards (flow depth and velocity) must be accurately assessed in high-risk areas during extreme flood events. However, the prediction of the very high flows is not an easy task due to the lack of field data and to the strong link between flow resistance and the land occupation of the...Contributeur (s):
-
Dupuis, V. / Proust, S. / Berni, C. / Paquier, A. - 2016Open channel flows subjected to a longitudinal transition in roughness, from bed friction to emergent cylinder drag and vice versa, are investigated experimentally in an 18 m long laboratory flume. These are compared to uniform flows subject to (1) bed roughness only and (2) an array of emergent...Contributeur (s):