000232054 001__ 232054
000232054 005__ 20190317000850.0
000232054 022__ $$a0197-9337
000232054 0247_ $$2doi$$a10.1002/esp.4243
000232054 037__ $$aARTICLE
000232054 245__ $$aTransport of suspended sediments under the influence of bank macro-roughness
000232054 260__ $$c2018
000232054 269__ $$a2018
000232054 336__ $$aJournal Articles
000232054 500__ $$a[1174]
000232054 520__ $$aRiver restoration works often include measures to promote morphological diversity and enhance habitat suitability. One of these measures is the creation of macro-roughness elements, such as lateral cavities and embayments, in the banks of channelized rivers. However, in flows that are heavily charged with fine sediments in suspension, such as glacier-fed streams and very low-gradient reaches of large catchment rivers, these lateral cavities may trap these sediments. Consequently, the morphological changes may be affected, and the functionality of the restoration interventions may be compromised. Herein, we analyse the influence of these macro-roughness elements on the transport of fine sediments in the main channel. Laboratory tests with uniform flow charged with sediments in a channel with banks equipped with large-scale rectangular roughness elements were carried out. The laboratory experiments covered a wide range of rectangular cavity geometrical configurations and shallowness ratios. The influence of key parameters such as flow shallowness, geometric ratios of the cavities and initial sediment concentration was tested. Surface particle image velocimetry, sediment samples and temporal turbidity records were collected during the experiments. The amount of sediments captured by the cavities, the temporal evolution of the concentration of sediments in suspension and the flow hydrodynamics are cross-analysed and discussed. It is shown that the trapping efficiency of the macro-roughness elements is a clear function of the channel geometry and the shallowness of the flow.
000232054 6531_ $$aBank macro-roughness
000232054 6531_ $$aRiver embayments
000232054 6531_ $$aLateral cavities
000232054 6531_ $$aFine sediments
000232054 6531_ $$aSediment transport in suspension
000232054 6531_ $$aHydrodynamics
000232054 700__ $$0249017$$aJuez Jiménez, Carmelo$$g257452
000232054 700__ $$aBuehlmann, Iria
000232054 700__ $$aMaechler, Gaetan
000232054 700__ $$0241228$$aSchleiss, Anton$$g112841
000232054 700__ $$0246576$$aFranca, Mário J.$$g151418
000232054 773__ $$j43$$k1$$q271-284$$tEarth Surface Processes and Landforms
000232054 8560_ $$falain.borel@epfl.ch
000232054 8564_ $$s2619443$$uhttps://infoscience.epfl.ch/record/232054/files/2017-1174%20Juez_B%C3%BChlmann_Maechler_Schleiss_Franca_Tranpsort%20of%20suspended%20sediments%20under%20the%20influence%20of%20banck%20macro-roughness.pdf$$yn/a$$zn/a
000232054 909C0 $$0252079$$pLCH$$xU10263
000232054 909C0 $$0255473$$pPL-LCH$$xU10263
000232054 909CO $$ooai:infoscience.tind.io:232054$$particle$$pENAC$$qGLOBAL_SET
000232054 917Z8 $$x151659
000232054 937__ $$aEPFL-ARTICLE-232054
000232054 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000232054 980__ $$aARTICLE