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Showing 1 to 18 of 18 for “"meandering river"”.
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Meandering river dynamics
Meandering channels are dynamic landforms that arise as a result of fluid mechanic and sedimentary processes. Their evolution has been described by the meander morphodynamic equations, which dictate that channel curvature and bed topology give rise to local perturbations in streamwise fluid …
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Form and function of anabranches and floodplain secondary channels in lowland meandering river systems
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-08-01
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Influence of riparian vegetation on near-bank flow structure and rates of erosion on a large meandering river
The dynamic process of meandering in alluvial rivers occurs through complex interactions among autogenic processes such as three-dimensional flow structure, channel planform geometry, and sediment transport. These internal processes can be strongly influenced by the geotechnical properties of the …
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Spatial and temporal variability in floodplain sedimentation during individual hydrologic events on a lowland, meandering river: Allerton Park, Monticello, Illinois
… flood events on the floodplain of the Sangamon River at Allerton Park in Monticello, Illinois. The five events observed had peak discharges of 40-250 m3/s. During each event, deposition was found to occur most frequently and with greatest magnitude in and adjacent to floodplain channels. …
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Numerical modeling of river migration incorporating erosional and depositional bank processes
… the nature of morphologic changes of meandering rivers has long attracted the attention of the scientific community, in the fields of fluvial geomorphology, hydraulic engineering and river restoration. Several meander evolution models developed over the years have provided a deeper …
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High-Resolution Inversion and Spectral Decomposition: Case Studies from the Bohaiwan Basin, China
… the Jiyang dataset, as it varies from a braided river system to a meandering river system morphology.
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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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How do sand-bed meandering rivers co-construct their own bankfull discharge and bankfull channel geometry? Analytical and numerical study
Alluvial rivers are authors of their own geometry. Given water and sediment, a river constructs its own well-defined channel and floodplain. This channel is characterized by a bankfull width and depth, longitudinal slope, and bankfull discharge when the flow spills out onto the floodplain. No …
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Objectively identifying spatial variability in bankfull stage
… theory about process dynamics in alluvial meandering river systems for decades. As the flow that defines the transition between channel and floodplain and marks the level of incipient flooding, bankfull flow represents an important geomorphic and hydrological threshold. However, most field …
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Flow, sediment transport, and bed topography in straight and curved gravel-bed channels
In recent years, many river restoration projects have aimed to restore natural channel stability and dynamism by re-establishing channel meanders lost to historical channelization. An understanding of meandering channel behavior is crucial to successful restoration of these rivers. Meandering and …
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The development of a predictive procedure for localised three dimensional river flows
… flows typically found at localised areas of river systems. It is the intention that the model will be used to predict flow situations which are fully three dimensional. The model is, therefore, tested against a fully three dimensional test case of flow in a two-stage meandering channel. …
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Flow structure of an asymmetric large river confluence
… and confluence morphodynamics at a large river confluence with an asymmetrical planform. Five sets of field measurements of three-dimensional velocity components and bed topography at the confluence of the Wabash River and Embarras River along the Illinois-Indiana border reveal a complex …
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Dynamics of river meanders: bankfull geometry and planimetric configuration
Meandering rivers are ubiquitous on the surface of the Earth and are key elements of every ecosystem they are embedded in. They distribute water, sediments and nutrients all over the floodplain, they provide a mean of transportation and energy production, and they offer many other ecosystem …
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Mid Cretaceous fossil forests of Alexander Island, Antarctica
… The fluvial environment matured from a braided river system, with frequent floods and unstable channel banks, to a more mature meandering river system with more stable floodplain areas. Low energy floods preserved plants that grew on the river channel banks in fine muds and silts. Catastrophic …
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A study of flow structures in a two-stage channel using field data, a physical model and numerical modelling
… measurements of velocity and resistance in a river, undertaken over a three year period, and numerical modelling of open channel flow. An Acoustic Doppler Current Profiler (ADCP) was used to measure the spatial distribution of velocity in two cross sections of a small meandering river (River …
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From meander bend to oxbow lake: morphodynamics and sedimentology of chute cutoffs
Chute cutoffs are common features of meandering channels. The development of a chute cutoff locally shortens and straightens a meandering river channel, excavating a large volume of floodplain sediment as the chute channel deepens and widens. Bar development at the upstream and downstream ends of …
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Controls on and Morphodynamic Effects of Width Variations in Bed-load Dominated Alluvial Channels: Experimental and Numerical Study
… and the controls on width adjustment in rivers has a key role in developing management approaches able to account for the physical, ecological and socio-economical dimensions of a river system. Width adaptation in a river occurs due to erosion and accretion of banks, within various …
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Disclose river morphodynamics processes through experiments
Rivers’ behavior is increasingly of interest to wide engineering and scientific communities. In fact, fluvial dynamics have an impact on infrastructure and anthropic environments as well as on natural habitats. In addition, the economic values of river as routes of commerce is great, as is the …