نتایج جستجو برای: bedload transport

تعداد نتایج: 273915  

Journal: :European Journal of Mechanics B-fluids 2021

We present results from Euler–Lagrange simulations of turbulent flow over an erodible monodisperse bed particles at a shear Reynolds number Reτ=180. The Galileo Ga and the ratio Shields to critical Θ/θcr were varied in range 11.4 29.8 1.32 5.98, respectively. Two drag force models investigated along with influence lift, particle rotation, tangential collision forces for each model. Both give si...

2010
David Gonzalez-Rodriguez Ole Secher Madsen

Experimental studies of sediment transport rates due to nearshore waves are often conducted in oscillating water tunnels (OWTs). In an OWT, the oscillatory motion produced by the piston propagates almost instantaneously along the entire tunnel. Consequently, unlike the wave motion in the sea or in a wave flume, flow in an OWT is uniform along the tunnel, and second-order wave propagation effect...

Journal: :Water Resources Research 2021

Bedload transport is a key process in fluvial morphodynamics, but difficult to measure. The advent of seismic monitoring techniques has provided an alternative in-stream monitoring, which often costly and cannot be utilized during large floods. Seismic method requiring several steps convert data into bedload flux data. State-of-the-art conversion approaches exploit physical models predicting th...

Journal: :Catena 2022

The Himalayan rivers yield the most significant flux of continental sediments into ocean. Organic matter (OM) transported by these provides a peek at influence diverse geological terrains, soil types, vegetation, and climate on carbon cycling within narrow boundary. We analyzed suspended bedload from four to trace their sources, elucidate fate during fluvial transport, estimate organic (OC) flu...

Journal: :Water Resources Research 2021

Understanding how river bedload responds to climate and land use changes water resource management initiatives is critical in developing sustainable approaches management. Passive monitoring techniques permit investigation of interannual dependencies transport high resolution, including sediment supply factors. Here, seismic impact plate records are processed using a probabilistic model BedLoad...

2007
Joel P. Johnson Kelin X. Whipple

Natural bedrock rivers flow in self-formed channels and form diverse erosional morphologies. The parameters that collectively define channel morphology (e.g. width, slope, bed roughness, bedrock exposure, sediment size distribution) all influence river incision rates and dynamically adjust in poorly understood ways to imposed fluid and sediment fluxes. To explore the mechanics of river incision...

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