Results 21 to 30 of about 250 (214)

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

Improvement of Sickle Cell Disease Care Mitigates the Healthcare Utilization Induced by Increased Prevalence: Experience of a Tertiary Pediatric Center

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Sickle cell disease (SCD) has undergone major changes in the last decades. Its prevalence has been steadily increasing and numerous advances have been made in the management of the disease. However, the effect in real‐life setting of these major changes is unknown, particularly in a Canadian environment. Procedure We aimed to assess
Maude Cigna, Alexia Muresan, Estelle Lecluze, Karine Leduc, Nathalie Fournier, Maria Tamer, Jean‐François Delisle, Jeremi Charbonneau, Annie Viau, Jessica Darilus, Marie‐Joëlle Doré‐Bergeron, Valérie Arsenault, Evelyne Doyon‐Trottier, Stéphanie Forte, Nancy Robitaille, Yves Pastore, Thomas Pincez   +16 more
wiley   +1 more source

Improving a multi-grain-size total sediment load model through a new standardized reference shear stress for incipient motion and an adjusted saltation height description [PDF]

Earth Surface Dynamics
Modelling sediment transport is important to understand how fluvial systems respond to climatic change or other transient conditions such as catastrophic sediment release.
M. Le Minor, M. Le Minor, D. Lague, J. Howarth, P. Davy   +4 more
doaj   +1 more source

Experimental Study on Uniform and Mixed Bed-Load Sediment Transport under Unsteady Flow

Applied Sciences, 2020
The scouring and deposition of sediment caused by unsteady flows (e.g., storm waves and floods) produces many secondary disasters. The resultant bed-load movement exhibits different transport laws compared with that by steady flow.
Zihao Duan, Jie Chen, Changbo Jiang, Xiaojian Liu, Bingbing Zhao   +4 more
doaj   +1 more source