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Showing 1 to 14 of 14 for “"Meander Bends"”.
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The fluvial dynamics of compound meander bends
The dynamic evolution of the planform of meandering rivers often leads to the development of compound loops with multiple lobes of maximum curvature, also known as compound meander bends. At present, the interaction among spatial patterns of mean flow, turbulence, bed morphology, bank failures and …
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The fluvial dynamics of confluent meander bends
… channel. In contrast, natural rivers often meander and tributaries can enter meandering rivers on the outside of bends to form a junction planform known as a confluent meander bend. Experimental and numerical modeling studies have begun to document flow structure at confluent meander bends …
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The Effects of Vegetation on Stream Bank Erosion
… bank face, such as those found on the outside of meander bends. In addition to reinforcing the stream banks, riparian vegetation also affected soil moisture and altered the local microclimate. While summer soil desiccation was reduced under deciduous riparian forests, as compared to herbaceous …
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Preferential and Non-Darcy Flows in the Hyporheic Zone: Surface Water-Groundwater Hydraulics and Effects on Stream Functions
… of macropores to hyporheic transport through meander bends was explored. Transport velocities, hydraulic head gradients, and solute transport rates through the meander bend were increased by macropores. Results indicate that macropores can dictate solute or pollutant transport through meander …
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Meandering rivers morphodynamics - integrating nonlinear modeling and remote sensing
… investigation of the morphodynamics of meandering rivers mostly involved the theoretical-analytical methodology. The development of analytical models enabled the definition of equilibrium conditions, stability and evolution of river meanders and to investigate the interaction between …
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Channel Migration and Bank Erosion of the Clark Fork River at Grant-Kohrs Ranch N.H.S., Western Montana
… areas of deposition were calculated for the main meander bends, and results show that these areas are unbalanced throughout the study reach. The average current erosion rate for the time interval between 2001 and 2007 was determined to be 0.170m²/m/yr, while the rate of deposition was determined …
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Channel Migration and Bank Erosion of the Clark Fork River at Grant-Kohrs Ranch N.H.S., Western Montana
… areas of deposition were calculated for the main meander bends, and results show that these areas are unbalanced throughout the study reach. The average current erosion rate for the time interval between 2001 and 2007 was determined to be 0.170m²/m/yr, while the rate of deposition was determined …
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Spatial ecology of the smooth softshell turtle (Apalone mutica) in the Kaskaskia River of Illinois
… home ranges in the main river channel near meander bends. Within home ranges, males preferred bars over all other habitats and females preferred pools. Mixed models indicated females used deeper waters than males, but neither sex showed an affinity for deadwood. Overall, there were clear …
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The influence of channel-skewed bedforms on flow structure in a high-amplitude meandering channel
… the local flow structure, especially within meander bends, and the temporal evolution of these interactions determines the behavior of channels as they migrate across their floodplains. Within high-amplitude bends, large dunes often develop that have their crestlines skewed diagonally with …
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Effects of Reservoir Releases on Slope Stability and Bank Erosion
… straight as well as inside and outside channel meander bends located on the lower Roanoke River near Scotland Neck, North Carolina. Extensive laboratory and field experiments were performed to define the hydraulic and geotechnical properties of the riverbank soils at each site. Specifically, …
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Hydrodynamics and Morphodynamics in Kinoshita Meandering Channels
… hydrodynamics and morphodynamics of transitional meandering channels. Among the hydrodynamic effects, it is observed that downstream skewed configurations produce fully-developed secondary flows around the bend apex, while upstream-skewed configuration results in non-developed secondary flow. The …
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Meander migration with physically-based bank erosion
Interest in meander evolution has recently been revitalized with ongoing efforts worldwide to re-naturalize highly modified streams through re-meandering, with the consequent need of assessment tools. While research on meandering rivers has been very productive in the last five decades, among the …
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Numerical, field and laboratory studies of three-dimensional flow structures at river channel confluences
… secondary circulation cells similar to those in meander bends. Recent work has highlighted the common occurrence of, and importance of, bed discordance at river confluences due to a significant difference in bed levels of one or both tributaries compared to the post-confluence bed level. In some …
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Lagrangian observations and numerical modelling of hydrodynamics, turbulence, and sediment transport in a tidal river
… the tidally driven, heavily sediment-laden and meandering Kaipara River, New Zealand. In particular, I investigate the performance of Delft3D-FLOW in modelling flow speeds, turbulence, and sediment transport along a 15-km stretch of the tidally influenced river in a Lagrangian (flow-following) …