000151686 001__ 151686
000151686 005__ 20180317092212.0
000151686 020__ $$a978-3-939230-00-7
000151686 037__ $$aCONF
000151686 245__ $$aUnsteady flow in a channel with large scale bank roughness
000151686 269__ $$a2010
000151686 260__ $$aBraunschweig, Germany$$bEd. Dittrich, Koll, Aeberle & Geisenhainer (eds)$$c2010
000151686 336__ $$aConference Papers
000151686 500__ $$a[737]
000151686 520__ $$aSystematic investigations on positive and negative surge waves from upstream have been conducted in a 40 m long channel with a mean bed slope of 1.14? and non-prismatic bank geometries. The channel banks included macro-roughness elements, namely various cavities. In total, 41 different geometrical configurations have been investigated. The surge wave experiments confirmed the applicability of the elementary surge wave theory including secondary waves and wave breaking in the prismatic reference configuration. In geometries with channel bank macro-roughness, the absolute surge wave celerity Vw and the celerity surge wave celerity c are reduced. Among other reasons, the observed reduction of the absolute surge wave celerity is due to the increased flow resistance and lays between 5% and 30% for both, positive and negative waves from upstream. Due to the dispersive character, the positive and negative surges from upstream are characterized by a sudden change (front), followed by a progressive change (body) of the water level. Under the influence of bottom slope and friction, the height of the front of a surge wave is reduced exponentially along the channel. This reduction can be described by a simple mathematical model. Its calibration on the surge wave experiments pointed out the extra diffusion due to the macro-scale roughness. 
000151686 6531_ $$aUnsteady flow, Macro-roughness, Surge wave experiments
000151686 700__ $$0244038$$aMeile, Tobias$$g110836
000151686 700__ $$0240225$$aBoillat, Jean-Louis$$g104572
000151686 700__ $$0241228$$aSchleiss, Anton$$g112841
000151686 7112_ $$aRiver Flow 2010$$cBraunschweig, Germany$$dSeptember 8-10, 2010
000151686 773__ $$q621-629$$tRiver Flow 2010
000151686 8564_ $$uhttp://www.riverflow2010.org/$$zURL
000151686 8564_ $$s2216725$$uhttps://infoscience.epfl.ch/record/151686/files/2010-737-Meile_Boillat_Schleiss_Unsteady_flow_in_a_channel_with_large_scale_bank_roughness_River_Flow_2010.pdf$$yn/a$$zn/a
000151686 909CO $$ooai:infoscience.tind.io:151686$$pENAC$$pconf
000151686 909C0 $$0252079$$pLCH$$xU10263
000151686 917Z8 $$x206365
000151686 937__ $$aEPFL-CONF-151686
000151686 973__ $$aEPFL$$rNON-REVIEWED$$sPUBLISHED
000151686 980__ $$aCONF