Results 21 to 30 of about 1,541 (218)
Railway Engineering Science, 2023 Cyclic load is widely adopted in laboratory to simulate the effect of train load on ballast bed. The effectiveness of such load equivalence is usually testified by having similar results of key concerns of ballast bed, such as deformation or stiffness ...
Longlong Fu +3 more
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Experimental evaluation of resistance of eroded bed in sediment laden open channel flow: Combined load transport case [PDF]
EPJ Web of ConferencesA relation between the discharge and the flow depth in an open channel is quite sensitive to resistance (expressed by the friction coefficient) of the channel bottom.
Matoušek Václav
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Movement characteristics and transport laws of the bimodal bed load
Shui 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
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Probabilistic Modeling of Bed-Load Composition [PDF]
Journal of Hydraulic Engineering, 2004 This paper proposes that the changes which occur in composition of the bed load during the transport of mixed-grain-size sediments are largely controlled by the distributions of critical entrainment shear stress for the various size fractions. This hypothesis is examined for a unimodal sediment mixture by calculating these distributions with a discrete
McEwan, I. +6 more
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Bed load transport by submerged jets [PDF]
Proceedings of the National Academy of Sciences, 1979 Some similarities are presented between the bed load transport of noncohesive grains in long rivers and at a local, jet-induced scour. Experiments are described in which a submerged two-dimensional slot nozzle, inclined downward, eroded a deep sand bed.
J R, Francis, P S, McCreath
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Comparing the Efficiency of Sediment Rating Curve and ANN Models in Estimating River Bed-load [PDF]
جغرافیا و پایداری محیط, 2017 Evaluation and selection of the most appropriate methods for bed-load estimation is necessary because of the sampling difficulties and inaccurate estimations of the empirical equations.
Jamal Mosaffaie +2 more
doaj
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 +2 more
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Experimental study of bed load movement characteristics based on high speed video measurement
Shui kexue jinzhan, 2016 Bed load transport is closely connected with the turbulent structures of open-channel flow. Studies on the interaction between the movement of sediment particles and flow turbulence are of essential significance to both fluid mechanics and river dynamics.
WANG Hao +3 more
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Bed load texture in an Alpine gravel bed river [PDF]
Water Resources Research, 2001 The spatial and temporal variations in bed load texture measured in a gravel bed river with a Helley‐Smith sampler are compared with its bed material texture. Most measurements were undertaken at low excess shear stress, with low bed load discharge over an armored bed.
Helmut M. Habersack, Jonathan B. Laronne
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Pediatric Blood &Cancer, EarlyView.ABSTRACT Background An earlier study on children diagnosed with acute lymphoblastic leukemia (ALL) at Moi Teaching and Referral Hospital (MTRH) in Kenya reported a low event‐free survival (EFS), excess treatment abandonment, and high induction mortality.
Gilbert Olbara +7 more
wiley +1 more source