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The potential of yeast culture for alleviating enterotoxigenic <i>Escherichia coli</i>-induced diarrhea in neonatal livestock: Insights from intestinal barrier mechanisms. [PDF]

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Wang S, Bai P, Chen H, Yang L, Liu D.
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Clear water scour at abutments

Water Management, 2004
Laboratory experimental results on local scour at short abutments (abutment length:flow depth ratio ≤ 1), namely vertical-wall, 45° wing-wall and semicircular, in uniform and non-uniform sediments under a clear water scour condition are presented. The equilibrium scour depth is related to the sediment size and approaching flow depth relative to the ...
S. Dey, A. K. Barbhuiya
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Constriction Effects in Clear-Water Scour at Abutments

Journal of Hydraulic Engineering, 2009
The erosion process at a bridge abutment may be affected by the flow constriction when the abutment occupies a significant part of the flume width. We devised a specific experimental campaign to investigate the effect of the obstruction ratio (i.e., the ratio between the abutment length and the channel width) on the erosion depth: we performed ...
BALLIO, FRANCESCO, A. TERUZZI, RADICE, ALESSIO   +2 more
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Clear‐Water Scour at Cylindrical Piers

Journal of Hydraulic Engineering, 1983
The results of laboratory experiments on the clear-water local scour of cohesionless bed sediment at cylindrical piers are presented. Based on the data, equilibrium depth of local scour is related to the particle size distribution of the bed sediment, mean particle size of the bed sediment, relative to the pier diameter, flow depth relative to both the
Arved J. Raudkivi, Robert Ettema
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Clear‐Water Scour around Abutments in Floodplains

Journal of Hydraulic Engineering, 1994
Clear‐water scour around a bridge abutment in the floodplain of a compound channel was investigated. Experiments were conducted in a flume with a fixed‐bed main channel and a movable‐bed floodplain in which the abutment terminated. Flow depth, discharge, compound‐channel geometry, and abutment length were varied, and measurements of approach velocity ...
Terry W. Sturm, Nazar Sadiq Janjua
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Effect of Sediment Gradation on Clear Water Scour

Journal of the Hydraulics Division, 1977
A comparison of the published experimental data on scour depths at bridge piers shows a large range of values at what appears to be identical conditions. It was therefore decided to investigate whether or not this variation could arise from different grain-size distributions of the bed material used. The experiments were carried out in a reecirculating
Arved J. Raudkivi, Robert Ettema
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Clear-water scour development at bridge abutments

Journal of Hydraulic Research, 2003
Development of local scour depths at vertical-wall bridge abutments of varying lengths was investigated in several series of experiments of ranges of uniform sediments and clear-water flow intensities. For each flow-abutment-sediment combination tested, the change with time in maximum local scour depth from plane-bed to equilibrium conditions was ...
Stephen E. Coleman, Christine S. Lauchlan, Bruce W. Melville   +2 more
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Clear Water Scour at Circular Piers: a Model

Journal of Hydraulic Engineering, 1995
The three-dimensional quasi-steady vortex flow field around circular piers in a quasi-equilibrium scour hole under a clear water regime has been investigated experimentally. The main characteristic features of the flow, to be modeled, are a relatively large secondary vortex flow within the scour hole and skewed velocity distributions along the ...
Subhasish Dey, Sujit K. Bose, Ghandikota L. N. Sastry   +2 more
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Clear Water Scour Downstream of Log Deflectors in Horizontal Channels

Journal of Irrigation and Drainage Engineering, 2015
AbstractStream deflectors are in-stream hydraulic structures that limit the flow channel width, thereby accelerating the flow through the constricted section. Single-wing and double-wing log deflectors are the two most commonly used types of in-stream eco-friendly structures. The purpose of this paper is to investigate the scour phenomena downstream of
Pagliara, Stefano, Hassanabadi, Leila, Kurdistani, Sahameddin Mahmoudi   +2 more
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Pier scour in clear water for sediment mixtures

Journal of Hydraulic Research, 2012
The current pier scour design in the USA is mainly based on the CSU equation, yet a recent incisive evaluation indicates a need to change it because substantial advances were made in the last two decades for understanding the pier scour processes. The objective of this research is then to propose a simplified scour mechanism and a physically-based ...
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