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Showing 1 to 20 of 25 for “"Suspended load"”.
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Sources of suspended load in the upper Orange River, South Africa
… attention has been given to the source of its suspended sediment load. The source of the suspended load is important because it can provide insight into soil erosion, a major problem in South Africa and globally. In this study the composition of the suspended sediment load of upper Orange River …
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Agile load transportation systems using aerial robots
… we address problems that can occur during load transport using aerial robots, i.e., small scale quadrotors. First, detailed models of such transportation system are derived. These models include nonlinear models of a quadrotor, a model of a quadrotor carrying a fixed load and a model of a …
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Establishing an unambiguous connection between grain size and style of sediment transport in the Lower Niobrara River, Nebraska, USA
… is often separated into two components, bedload and suspended load. This division is important because bedload has a dominant control on channel morphology while suspended load dominates the formation of overbank deposits. Experimental data has related the style of sediment transport to mean …
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Three-Dimensional Numerical Modeling Of Multiple-Sized Sediment Transport Modeling Under Current And Waves
… stresses. Meanwhile, empirical formulas for bed-load transport capacity, suspended-load transport capacity, and near-bed suspended-load concentration under current and waves are established for multiple-sized sediments. These formulas are used to close the sediment transport model. The flow and …
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Modelling the morphodynamics of tidal channels
… takes into account sediment transported as bed load and the suspended load. The numerical scheme is that proposed by Casulli & Cattani (1994) suitably modified for this particular problem; the advection-diffusion equation for the sediments transported into suspension , is solved using an …
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A reduced-order crawler crane model with active control to attenuate the transient vibrations
… the crane system due to the vertical drop of the suspended load is simulated by numerically integrating the equations of motion. The crane model includes the vertical translation and rotation of the crane body, the rotation of the boom, the stretch and pendulation of the load line, and two …
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Quantitative geomorphology and hydrology of the Cass River Basin, New Zealand
… of channels occur in the basin: confined bedload channels, unconfined bedload channels, and suspended-load channels. The confined and unconfined bedload channels are adjusted to transport a maximum of bedload sediment. The width of the confined bedload channels is limited by independent …
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Sedimentology of multistorey fluvial sandstones of the Mississippian Cypress Formation, Illinois Basin, USA
… fluvial system that had a high affinity toward suspended load transport. Principal sandstone lithofacies all contain exceptionally low volumes of detrital clay and include: unidirectional simple dune cross-sets, low amplitude (<3 m) – high wavelength (10s of meters) dune cross-sets, asymmetric …
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Sediment transport modelling at the catchment scale in Alpine streams
… algorithm of the CASCADE model to estimate the suspended load at the basin scale, accounting for the contribution to the sediment transport related to the local hydro-morphological conditions. The present work analyses three river case studies located in the Italian Alps (Trento Province, N-E …
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Suspended sediment supply dominated by channel processes in a low-gradient agricultural watershed, Wildcat Slough, Fisher, IL, USA
Nutrient loading in rivers in the Upper Sangamon River Basin has led to concentrations of nitrate that exceed EPA water quality standards and concentrations of phosphorous that promote algal growth. Nitrogen and phosphorous are primarily introduced by fertilization and transported via leaching …
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Bedform and Flow Relationships, Little Missouri River Near Medora, North Dakota
… current velocity, depth, water temperature, and suspended-load concentration. A bedload sample was also taken at each bedform. The median grain size of the sand fraction of the bedload sample was measured with a recording settling tube. Three relationships (velocity: depth, Reynolds number: …
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Bathymetric evolution of sand bed forms under partially standing waves
… of different sediment transport modes (bed load and suspended load), on the over all evolution of the sand bed. Throughout the experiments, conductivity probes measured the surface wave envelope, charged-coupled device (CCD) cameras recorded small scale (ripple) formations and migrations, …
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The use of corn pollen and glass beads to estimate fine particulate organic matter retention
… beads should be entrained and moved as bed- or suspended load. Gradient was the single best stream characteristic to explain variation in retention rates for both corn pollen and glass beads. Based on deposition velocities, estimates of benthic FPOM turnover times ranged from 20 hours to 8.3 …
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Suspended sediment erosion in laboratory flume experiments
… experiments are used to examine the role of suspended sediment abrasion in bedrock channel erosion. A range of topographies was used, from a planar bed to a sinuous and scalloped inner channel. Experiments were run separately with bedload (used to form topography) and suspended load at a …
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Seasonal and interannual variability in the hydrology and geochemistry of an outlet glacier of the Greenland Ice Sheet
… of partial and total digestions of the riverine suspended load (SSL) found that trace carbonates within the silicate watershed largely controlled the 87Sr/86Sr ratio in the dissolved load. Experiments and sampling transects downstream from the GrIS demonstrated that δ234U in the dissolved phase …
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The marine geochemistry of iron and iron isotopes
… The main channel river dissolved Fe samples and suspended loads were isotopically similar (≈ -0.2 to -0.45% relative to igneous rocks). The isotopically heaviest sample collected was dissolved Fe from an organic rich tributary, the Negro River (+0.16%). In contrast, the suspended load from the …
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Thin-bedded Facies Analysis of a Ferron Storm-dominated Delta Front and Prodelta: Cretaceous Ferron Sandstone, Utah
… 90% of all parasequences were represented by bedload deposits as opposed to suspended sediment settling. Tempestites, ignitive turbidites, and hyperpycnites likely occur within the same system, interacting with each other, producing deposits which have remnant signatures of each. Results show it …
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Seasonal and interannual variability in the hydrology and geochemistry of an outlet glacier of the Greenland Ice Sheet
… of partial and total digestions of the riverine suspended load (SSL) found that trace carbonates within the silicate watershed largely controlled the 'Sr/'Sr ratio in the dissolved load. Experiments and sampling transects downstream from the GrIS demonstrated that [delta]234U in the dissolved …
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Spatial Distribution of Fine Sediment and Juvenile Freshwater Mussel Settling in the Gravel Bedded Dan River, North Carolina
… Fine particles, such as sand and silt, are often suspended in the channel but can settle into the bed during low flows. The deposition of these particles is dependent on the bathymetry of the river as well as the flow conditions. Shear velocity determines the particle size that can remain …
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Fluvial sequence stratigraphy and paleoclimate of the Upper Triassic (Norian-Rhaetian) Chinle Strata, northern New Mexico.
… tectonic episodes may be discernible in suspended-load fluvial deposits that accumulated over a broad area. Each location contains abundant paleosols of varying maturity with relatively consistent features throughout the strata. A typical paleosol profile has features similar to modern …
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