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Particle size variations between bed load and bed material in natural gravel bed channelsAuthor(s): Thomas E. Lisle
Source: Water Resources Research 31(4): 1107-1118.
Publication Series: Miscellaneous Publication
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DescriptionAbstract - Particle sizes of bed load and bed material that represent materials transported and stored over a period of years are used to investigate selective transport in 13 previously sampled, natural gravel bed channels. The ratio (D*) of median particle size of bed material to the transport- and frequency-weighted mean of median bed load size decreases to unity with increasing drainage area, bank-full discharge, dimensionless stream power, and bed material sorting. In channels with high values of D*, significant volumes of fine bed load are transported during discharges that are less than bank-full, which is commonly associated with general entrainment of the coarse pavement in many gravel bed channels. This indicates transport of fine bed load over a more stable substrate of coarser bed material.
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CitationLisle, Thomas E. 1995. Particle size variations between bed load and bed material in natural gravel bed channels. Water Resources Research 31(4): 1107-1118.
KeywordsPSW4351, bed load, bed material, particle size, gravel bed channels, sediment, subsurface
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- The dominance of dispersion in the evolution of bed material waves in gravel-bed rivers
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