Results 261 to 270 of about 145,008 (321)

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, Raudkivi Arved J   +2 more
exaly   +3 more sources

Time development of clear-water scour around a pile foundation: Phenomenological theory of turbulence-based approach

Coastal Engineering
Existing prediction formulas for clear-water scour development are typically empirical fittings of lab-scale results. However, it is unreasonable to evaluate the in-situ clear-water scour process around a pile based on smallscale flume tests due to ...
Fu-Ping Gao
exaly   +4 more sources

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, MAHMOUDI KURDISTANI, SAHAMEDDIN   +2 more
semanticscholar   +5 more sources

Clear-water scour depth below underwater pipelines

Journal of Hydro-environment Research, 2007
Abstract The paper presents (1) a semi-theoretical model for the computation of maximum clear-water scour depth below underwater pipelines in uniform sediments under steady flow and (2) an experimental investigation on the influence of upward seepage on clear-water scour depth below underwater pipelines.
Subhasish Dey, Navneet P. Singh
openaire   +2 more sources

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
openaire   +3 more sources

Clear-water scour development at bridge abutments

Journal of Hydraulic Research/De Recherches Hydrauliques, 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, Bruce W Melville
exaly   +2 more sources

Clear Water Scour at Circular Piers: A New Formula Fitting Laboratory Data with Less Than 25% Deviation

Journal of Hydraulic Engineering, 2022
Alessio Radice, Daniel Rebaï, Francesco Ballio   +2 more
exaly   +2 more sources

Clear-water scour at long skewed bridge piers

Journal of the Chinese Institute of Engineers, 2016
AbstractThe results of an experimental study on clear-water scour at long skewed rectangular piers under steady flows at threshold velocity are presented. The scour mechanisms due to skewness effects with a wide range of angle of attack, α, and two sizes of uniform cohesionless bed sediment (d50 = 0.23 and d50 = 0.80 mm) have been investigated in a 50 ...
Ahmad, N, Melville, Bruce, Mohammad, T, Faisal, A, Yusuf, B   +4 more
openaire   +3 more sources

Clear-water scour depth at rock weirs under unsteady flows

Journal of Hydrology
Ruihua Nie, Xingnian Liu, Shengfa Yang   +2 more
exaly   +2 more sources