SOME STUDIES ON THE MECHANICS OF BED LOAD TRANSPORT
نویسندگان
چکیده
منابع مشابه
Calculating bed load transport in steep boulder bed channels
[1] Steep, rough channels occupy a large fraction of the total channel length in mountainous regions. Most sediment mobilized on hillslopes must pass through these streams before reaching lower-gradient channels. Steep channels have wide grain size distributions that are composed of finer, more mobile sediment and large, rarely mobile grains. The large grains can bear a significant portion of t...
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Understanding the mechanics of bed load at the flood scale is necessary to link hydrology to landscape evolution. Here we report on observations of the transport of coarse sediment tracer particles in a cobblebedded alluvial river and a step-pool bedrock tributary, at the individual flood and multi-annual timescales. Tracer particle data for each survey are composed of measured displacement len...
متن کاملThe Physical Basis for Anomalous Diffusion in Bed Load Transport
Recent studies have observed deviation from normal (Fickian) diffusion in sediment tracer dispersion that violates the assumption of statistical convergence to a Gaussian. Nikora et al. (2002) hypothesized that particle motion at short time scales is superdiffusive because of inertia, while long-time subdiffusion results from heavy-tailed rest durations between particle motions. Here we test th...
متن کاملSuspended load and bed-load transport of particle-laden gravity currents: the role of particle–bed interaction
The development of particle-enriched regions (bed-load) at the base of particle-laden gravity currents has been widely observed, yet the controls and relative partitioning of material into the bed-load is poorly understood. We examine particle-laden gravity currents whose initial mixture (particle and fluid) density is greater than the ambient fluid, but whose interstitial fluid density is less...
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ژورنال
عنوان ژورنال: Proceedings of the Japan Society of Civil Engineers
سال: 1971
ISSN: 1884-4936,0385-5392
DOI: 10.2208/jscej1969.1971.61