Results 21 to 30 of about 36,144 (312)

Numerical modelling of erosion and sedimentation around offshore pipelines [PDF]

open access: yes, 1990
In this paper a numerical model is presented for the description of the erosion and sedimentation near pipelines on the sea bottom. The model is based on the Navier-Stokes equations and the equation of motion and continuity of sediment.\ud \ud The ...
Beek, F.A. van, Wind, H.G.
core   +3 more sources

Scour depth model for grade-control structures [PDF]

open access: yesJournal of Hydroinformatics, 2017
Abstract Grade-control structures (GCS) are commonly used to protect fish habitat by preventing excessive river-bed degradation in mountain streams. However, flow over the GCS can cause localized scour immediately downstream of the weir. This paper aims to develop more accurate models for prediction of the maximum scour depth downstream ...
Bahram Gharabaghi   +3 more
openaire   +1 more source

Modeling of local scour depth downstream hydraulic structures in trapezoidal channel using GEP and ANNs

open access: yesAin Shams Engineering Journal, 2013
Local scour downstream stilling basins is so complex that it makes it difficult to establish a general empirical model to provide accurate estimation for scour depth. Lack estimation of local scour can endanger to stability of hydraulic structure and can
Yasser Abdallah Mohamed Moussa
doaj   +1 more source

Experimental study on toe scouring at sloping walls with gravel foreshores [PDF]

open access: yes, 2019
Sea defences, such as urban seawalls can fail due to the development of a scour hole at the toe of the structure. The scour depth or the information on ground levels at the structure toe is required for the sustainable management of coastal defences, due
Pearson, Jonathan M., Salauddin, M.
core   +1 more source

Effect of Cohesive and Non-Cohesive Soils on Equilibrium Scour Depth

open access: yesTikrit Journal of Engineering Sciences, 2007
In this research ,the effect of cohesive soils ( clay ) and non –cohesive soils sand on equilibrium scour depth was studied .Experiments were carried out on two types of clay and two types of sand as a bed material using an obstruction ( pier ) to create
Saleh Issa Khassaf
doaj   +1 more source

Evolution of local scour around a collared monopile through tidal cycles [PDF]

open access: yes, 2012
This paper presents the results of an experiment designed to assess the time-development of scour around an offshore wind turbine collared monopile over a number of tidal cycles. One collar shape and location was investigated.
Folkard, Andrew M.   +4 more
core   +3 more sources

Numerical modeling of scour depth at side piers of the bridge

open access: yesJournal of Computational and Applied Mathematics, 2015
Computational power and development of numerical models are new windows for simulation about flow and sediment transmission. The aim of this article is related to Numerical modeling of three-dimensional flow and sediment at the narrowing location of bridge. We selected the SSIM2 model because this model has high ability for numerical simulation.
Mohammad Ehteram, Amin Mahdavi Meymand
openaire   +1 more source

Analysis of Lateral Dynamic Response of Caisson Foundation in Layered Clayey Soils considering Scour-Hole Dimensions

open access: yesShock and Vibration, 2020
As a cross-sea or river deep-water foundation, it is clear that the caisson foundation will be subjected to significant lateral dynamic loads due to winds or waves and suffer from scouring under its long-term effect.
Wenbo Tu   +3 more
doaj   +1 more source

Extremes in dune preservation: controls on the completeness of fluvial deposits [PDF]

open access: yes, 2015
Understanding sedimentary preservation underpins our ability to interpret the ancient sedimentary record and reconstruct palaeoenvironments and palaeoclimates.
Amsler, Mario Luis   +7 more
core   +1 more source

Quantification of Modelling Uncertainties in Bridge Scour Risk Assessment under Multiple Flood Events

open access: yesGeosciences, 2019
Local scour is a dynamic process evolving during the lifetime of bridges as a result of the changes in hydrologic and hydraulic conditions. Current approaches for scour risk assessment are generally based on the evaluation of the equilibrium scour depth ...
Alonso Pizarro, Enrico Tubaldi
doaj   +1 more source

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