The physical basis for anomalous diffusion in bed load transport
نویسندگان
چکیده
منابع مشابه
The 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...
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Variation in the reference Shields stress for bed load transport in gravel-bed streams and rivers
[1] The present study examines variations in the reference shear stress for bed load transport (tr) using coupled measurements of flow and bed load transport in 45 gravel-bed streams and rivers. The study streams encompass a wide range in bank-full discharge (1–2600 m/s), average channel gradient (0.0003–0.05), and median surface grain size (0.027–0.21 m). A bed load transport relation was form...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research: Earth Surface
سال: 2012
ISSN: 0148-0227
DOI: 10.1029/2011jf002075