Results 21 to 30 of about 14,286 (264)

Advection and dispersion of bed load tracers [PDF]

Earth Surface Dynamics, 2018
We use the erosion–deposition model introduced by Charru et al. (2004) to numerically simulate the evolution of a plume of bed load tracers entrained by a steady flow. In this model, the propagation of the plume results from the stochastic exchange of
E. Lajeunesse, O. Devauchelle, F. James
doaj   +1 more source

Bed load transport of mixed size sediment: Fractional transport rates, bed forms, and the development of a coarse bed surface layer

Water Resources Research, 1989
Fractional transport rates, bed surface texture, and bed configuration were measured after a mixed size sediment had reached an equilibrium transport state for seven different flow strengths in a recirculating laboratory flume. Fractional transport rates were also measured at the beginning of each run when the bed was well mixed and planar.
Wilcock, Peter, Southard, J. B.
openaire   +3 more sources

Predicting fractional bed load transport rates: Application of the Wilcock‐Crowe equations to a regulated gravel bed river [PDF]

Water Resources Research, 2009
Bed load samples from four locations in the Trinity River of northern California are analyzed to evaluate the performance of the Wilcock‐Crowe bed load transport equations for predicting fractional bed load transport rates. Bed surface particles become smaller and the fraction of sand on the bed increases with distance downstream from Lewiston Dam. The
David Gaeuman, E. D. Andrews, Andreas Krause, Wes Smith   +3 more
openaire   +1 more source

Dynamic Characteristics of Suspended Load and Bed Load Transport in Meltwater Runoff of Qiyi Glacier

Shuitu Baochi Xuebao
[Objective] The transportation of sediment via glacial meltwater can not only reflect the glacial erosion and landform evolution, but also is one of the important sediment sources for the downstream river.
ZHAO Yi, WANG Ninglian, WU Songbai, ZHANG Quan, SHI Chenlie, ZHAO Mingjie   +5 more
doaj   +1 more source

Bed-load measurements on large, sand-bed rivers in the United States

E3S Web of Conferences, 2018
The movement of bed forms (sand dunes) in large sand-bed rivers is being used to determine the transport rate of bed load. The ISSDOTv2 (Integrated Section Surface Difference Over Time version 2) methodology uses time sequenced differences of measured ...
Abraham David, McAlpin Tate, Jones Keaton   +2 more
doaj   +1 more source

Parameter Optimization of a Bed Load Transport Formula for Nestos River, Greece

Proceedings, 2018
In the Second EWaS International Conference (June 2016, Chania, Crete, Greece), the bed load transport formula of Meyer-Peter and Müller (1948) was calibrated with respect to the bed roughness coefficient for Nestos River.
Epameinondas Sidiropoulos, Thomas Papalaskaris, Vlassios Hrissanthou   +2 more
doaj   +1 more source

Influence of Suspended Sediment Load on Roughness Coefficient and Intensity of Flow Turbulence (Case study: Haraz, Rostamabad and Beheshtabad Rivers) [PDF]

محیط زیست و مهندسی آب, 2020
Estimating the effect of sediment transport, especially suspended load, is important in river planning and management. The aim of this study was to investigate the effect of suspended sediment load on the roughness coefficient and the intensity of flow ...
Hossein Afzalimehr, Sanaz Hadian, Ehsan Shahiri Tabarestani, Meysam Mohammadi   +3 more
doaj   +1 more source

Performance of Bed-Load Transport Equations Relative to Geomorphic Significance: Predicting Effective Discharge and Its Transport Rate [PDF]

Journal of Hydraulic Engineering, 2008
Previous studies assessing the accuracy of bed-load transport equations have considered equation performance statistically based on paired observations of measured and predicted bed-load transport rates. However, transport measurements were typically taken during low flows, biasing the assessment of equation performance toward low discharges, and ...
Jeffrey J. Barry, John M. Buffington, Peter Goodwin, John G. King, William W. Emmett   +4 more
openaire   +1 more source

Establishing an Apheresis Medicine Program in a Resource‐Constrained Setting: A 5‐Year Experience From Lagos, Nigeria

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Background Establishing a comprehensive apheresis medicine program in a resource‐constrained setting presents significant structural, financial, and logistical challenges. Despite the growing clinical importance of apheresis services globally, published experience from sub‐Saharan Africa remains sparse.
Folasade Adelekan‐Popoola, Shakirat Gold‐Olufadi, Olufunto Olufela Kalejaiye, Abdullateef Ogala, Rasheed A. Balogun   +4 more
wiley   +1 more source

The Shewanella oneidensis Fic enzyme SoFic targets the switch‐I region of EF‐Tu for AMPylation

FEBS Letters, EarlyView.
Fic enzymes mediate diverse post‐translational modifications across all domains of life, including AMPylation. Prokaryotic EF‐Tu can be AMPylated and deAMPylated by the conserved Fic enzyme SoFic. Structural and biochemical approaches were used to characterize the effect of AMPylation on EF‐Tu, SoFic's enzymatic activities, and the enzyme‐target ...
Svenja Runge, Vivian Pogenberg, Alexander Baumgart, Bente Siebels, Hartmut Schlüter, Michael Hecht‐Bucher, Aymelt Itzen   +6 more
wiley   +1 more source