Results 11 to 20 of about 452 (216)

Bed-load transport modelling by coupling an empirical routing scheme and a hydrological-1-D-hydrodynamic model – case study application for a large alpine valley [PDF]

open access: yesAdvances in Geosciences, 2012
Sediment transport in mountain rivers and torrents is a substantial process within the assessment of flood related hazard potential and vulnerability in alpine catchments.
B. Gems   +5 more
doaj   +1 more source

The role of velocity, pressure, and bed stress fluctuations in bed load transport over bed forms: numerical simulation downstream of a backward-facing step [PDF]

open access: yesEarth Surface Dynamics, 2015
Bed load transport over ripples and dunes in rivers exhibits strong spatial and temporal variability due to the complex turbulence field caused by flow separation at bedform crests.
M. W. Schmeeckle
doaj   +1 more source

Experimental study on bed load transport in the armoring process

open access: yesShui kexue jinzhan, 2018
To study the characteristics of bed load transport during armor breakup and reformation, three groups of long-duration laboratory experiments were conducted without sediment supply. Each experiment group employed a stepwise increasing discharge.
XU Yuan, ZHU Dejun, MENG Zhen, LI Danxun
doaj   +1 more source

Movement of sediment over periodic bed [PDF]

open access: yesКомпьютерные исследования и моделирование, 2018
The movement of bed load along the closed conduit can lead to a loss of stability of the bed surface, when bed waves arise at the bed of the channel. Investigation of the development of bed waves is associated with the possibility of determining of the ...
Yuliya Georgievna Krat   +1 more
doaj   +1 more source

Movement characteristics and transport laws of the bimodal bed load

open access: yesShui kexue jinzhan, 2015
The non-uniform bed load transport is a complicated coherent physical process of the fluid and solid in river. The research into the motion characteristics,transport laws as well as the action mechanism of influencing factors can help to not only ...
SUN Dongpo   +5 more
doaj   +1 more source

Lagrangian and Eulerian Description of Bed Load Transport [PDF]

open access: yesJournal of Geophysical Research: Earth Surface, 2018
AbstractSediment particles transported as bed load undergo alternating periods of motion and rest, particularly at weak flow intensity. Bed load transport can be investigated by either following the motion of individual particles (Lagrangian approach) or observing the phenomenon at prescribed locations (Eulerian approach). In this paper, the Lagrangian
Francesco Ballio   +3 more
openaire   +3 more sources

Impact of the regularity of the sediment bed on bed‐load transport [PDF]

open access: yesPAMM, 2016
AbstractThe present study analyzes the impact of regularly arranged sediment bed on the particle clustering by introducing an artificial non‐uniformity in the particle packing. Two simulations only differing in their sediment bed configuration are reported with the non‐uniform roughness created through a random vertical displacement of the fixed ...
Ramandeep Jain   +2 more
openaire   +1 more source

Estimating sand bed load in rivers by tracking dunes: a comparison of methods based on bed elevation time series [PDF]

open access: yesEarth Surface Dynamics, 2020
Quantifying bed-load transport is paramount to the effective management of rivers with sand or gravel-dominated bed material. However, a practical and scalable field methodology for reliably estimating bed load remains elusive.
K. C. P. Leary   +2 more
doaj   +1 more source

A bed-load formula based on kinetic theory

open access: yesShui kexue jinzhan, 2013
Bed-load plays an important role in sediment transport in fluvial rivers. This paper presents a bed-load formula on the basis of kinetic theory. The pick-up rate of bed-load sediment in the formula is obtained by integrating the velocity distribution ...
ZHANG Lei   +3 more
doaj   +1 more source

Sediment Transport Analysis of Sesayap River, Malinau District, North Kalimantan

open access: yesJournal of the Civil Engineering Forum, 2017
River could have a very important role in improving the economy of a country when it is correctly and properly utilized. Nevertheless, rivers in Indonesia also have various problems, i.e.
Hardhi Rafsanjani
doaj   +1 more source

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