scholarly journals Dynamics of channel bifurcations in noncohesive sediments

2003 ◽  
Vol 39 (6) ◽  
Author(s):  
Bianca Federici ◽  
Chris Paola
Keyword(s):  
Noncohesive Sediments

Use of 2D/3D Models for Cohesive and Noncohesive Sediments in Irrigation Canals

2021 ◽  
Vol 147 (5) ◽  
pp. 05021002
Author(s):  
Shaimaa A. Theol ◽  
Bert Jagers ◽  
F. X. Suryadi ◽  
Charlotte de Fraiture
Keyword(s):  
3D Models ◽  
Irrigation Canals ◽  
Noncohesive Sediments

Equilibrium scour depths around piles in noncohesive sediments under currents and waves

2011 ◽  
Vol 58 (10) ◽  
pp. 986-991 ◽  
Author(s):  
Ulrich C.E. Zanke ◽  
Tai-Wen Hsu ◽  
Aron Roland ◽  
Oscar Link ◽  
Reda Diab
Keyword(s):  
Noncohesive Sediments

Evaluation of Existing Semi-Empirical Models of Scour at a Submarine System

2018 ◽  
Author(s):  
Valeria S. Rego ◽  
Claudia M. P. M. Santos
Keyword(s):  
Experimental Data ◽  
Empirical Models ◽  
Small Scale ◽  
Scour Depth ◽  
Simplified Models ◽  
Practical Applications ◽  
Survey Statistics ◽  
Evaluation Of Data ◽  
Semi Empirical ◽  
Noncohesive Sediments

Assessment of scour below pipelines and gravity based structures in a submarine system is revisited with evaluation of data from two inspections and results for semi-empirical simplified models. Usually semi-empirical models are based on small scale experimental data that normally consider uniform and noncohesive sediments and have been questioned as to their practical applications. Recent local metocean data is used to revisit predictions of onset of scour and scour depth for the system, which are compared to survey statistics.

The Influence of Cohesion on Sediment Behaviour

1992 ◽  
Vol 25 (8) ◽  
pp. 151-164 ◽  
Author(s):  
C. Nalluri ◽  
E. M. Alvarez
Keyword(s):  
Shear Stress ◽  
Circular Cross Section ◽  
River Basin Management ◽  
Sediment Type ◽  
Engineering Research ◽  
Management Project ◽  
Type C ◽  
The University ◽  
Newcastle Upon Tyne ◽  
Noncohesive Sediments

This paper describes the results of a laboratory study financed by the Science and Engineering Research Council (SERC), UK. The work was carried out at the University of Newcastle upon Tyne in collaboration with the Water Research Centre's (WRc) River Basin Management Project during the period 1987-90. The present study has covered hydraulics, deposition, erosion and sediment transport, all with deposited bed. Noncohesive sands and sewer sediment analogues (with cohesive additives to sand) have been used and throughout the study comparisons between cohesive and noncohesive sediments were made. The noncohesive sediment studies suggested that the initiation of erosion and transport rates criteria in channels of circular cross-section using bed shear stress are comparable to those of wide channels. The sewer sediment analogues corresponding to type A needed a maximum mean shear stress of around 6-7 N/m2 whereas a weaker sediment (type C) needed only around 2.5 N/m2. The chosen cohesive analogues behaved as noncohesive sediments once they started moving, perhaps a phenomenon close to reality.

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