000202265 001__ 202265
000202265 005__ 20190317000030.0
000202265 0247_ $$2doi$$a10.1061/(ASCE)HY.1943-7900.0000591
000202265 022__ $$a0733-9429
000202265 02470 $$2ISI$$a000342227400007
000202265 037__ $$aARTICLE
000202265 245__ $$aDiscussion of "Skimming, Nonaerated Flow on Stepped Spillways over Roller Compacted Concrete Dams" by Ines Meireles, Floriana Renna, Jorge Matos, and Fabian Bombardelli
000202265 269__ $$a2014
000202265 260__ $$bAmerican Society of Civil Engineers$$c2014$$aReston
000202265 300__ $$a2
000202265 336__ $$aJournal Articles
000202265 500__ $$a[1009]
000202265 520__ $$aThe nonaerated region may occupy a large portion of the skimming flow in steep, stepped spillways, particularly for relatively high unit flow rates. In spite of the numerous contributions on the hydraulic properties at both the inception point of air entrainment and the aerated region, much less is known regarding the flow in the nonaerated region. In this paper, new empirical evidence, based on an extensive data set obtained during several years in a large-scale facility, sheds light on the features of the nonaerated-flow region. Diverse ways to locate and estimate the main hydraulic properties at the inception point are first discussed and compared. Then, expressions capable of characterizing the main flow variables along the nonaerated region are presented, namely, the boundary-layer development, the velocity distribution, the equivalent clear-water depth, the characteristic depth taking into account the free-surface unsteadiness due to turbulence, and the energy dissipation. The energy dissipation is observed to be larger than that for smooth spillways, although much smaller than values typically reported for aerated flows at the toe of stepped spillways.
000202265 700__ $$0244418$$g202221$$uEcole Polytech Fed Lausanne, Lab Hydraul Construct LCH, CH-1015 Lausanne, Switzerland$$aPfister, Michael
000202265 700__ $$aBoes, Robert M.
000202265 773__ $$j140$$tJournal Of Hydraulic Engineering$$k10
000202265 8564_ $$uhttps://infoscience.epfl.ch/record/202265/files/2014-1009_Pfister_Boes_%20Discussion%20of%20Skimming%20Nonaerated%20Flow%20on%20Stepped%20Spillways%20over%20Roller%20Compacted%20Concrete%20Dams.pdf$$zn/a$$s1015560$$yn/a
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000202265 917Z8 $$x246105
000202265 917Z8 $$x246105
000202265 937__ $$aEPFL-ARTICLE-202265
000202265 973__ $$rREVIEWED$$sPUBLISHED$$aEPFL
000202265 980__ $$aARTICLE