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Bed load transport regime of a small forest stream
Journal article   Peer reviewed

Bed load transport regime of a small forest stream

Roy C Sidle
Water Resources Research, Vol.24(2), pp.207-218
1988
url
https://doi.org/10.1029/WR024i002p00207View
Published Version

Abstract

erosion time series analysis
Bed load transport in a small gravel-bedded stream on Chichagof Island, Alaska, was measured for 33 autumn storm flows during 1980 through 1985 to determine temporal and spatial trends within a riffle-pool-riffle sequence. The transport of fine sediment was more frequent than coarse sediment. Scouring of coarse material in the reach appeared to be triggered only by high flows with T//r greater than equivalent to 5 years. Within a given storm season, both antecedent storm history and cumulative flow (above the threshold for bed load transport, 0. 25 m**3 s** minus **1) influenced bed load transport; however, the effects of these seasonal factors changed from year to year, presumably in response to storage and release of sediment around large organic debris upstream. Hysteresis loops existed in bed load transport versus flow plots for many storms. Fine bed load material was more subject to such differential transport over the storm hydrograph than was coarse material.

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Environmental Sciences
Limnology
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