期刊
WATER RESOURCES RESEARCH
卷 50, 期 12, 页码 9211-9220出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/2014WR015597
关键词
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资金
- Chevron Energy Technology Company
- University of Wyoming School of Energy Resources
- National Science Foundation [DMS-1127914]
We compiled a data set of 541 bankfull measurements of alluvial rivers (see supporting information) and used Bayesian linear regression to examine empirical and theoretical support for the hypothesis that alluvial channels adjust to a predictable condition of basal shear stress as a function of sediment transport mode. An empirical closure based on channel slope, bankfull channel depth, and median grain size is proposed and results in the scaling of bankfull Shields stress with the inverse square root of particle Reynolds number. The empirical relationship is sufficient for purposes of quantifying paleohydraulic conditions in ancient alluvial channels. However, it is not currently appropriate for application to alluvial channels on extraterrestrial bodies because it depends on constant-valued, Earth-based coefficients.
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