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Analyses of the temporal variation on coarse bedload transport and its grain size distribution : Squaw Creek, Montana, USA .

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Title	Analyses of the temporal variation on coarse bedload transport and its grain size distribution : Squaw Creek, Montana, USA.
Contributor	Rocky Mountain Forest and Range Experiment Station (Fort Collins, Colo.)
Description	A continuous record of coarse material bedload transport was obtained for an entire snowmelt high flow at Squaw Creek, a gravel-bed mountain stream in Montana. The measuring principle, the Magnetic Tracer Technique, makes use of naturally magnetic rocks (andesites) which induce a voltage peak as they pass over a detector log installed across the stream bottom. The wide scatter in the relationship between bedload transport and discharge indicates that other parameters than flow affect bedload transport as well. Series of bedload samples were taken during nightly flood waves with a large net-sampler. Water surface slope was measured over a riffle areas between two points 17.3 m apart. Combining results from various approaches of this study, bedload transport could be explained as adjustment processes between the sedimentary conditions of the river bed and the hydraulics of flow. Given the conditions of ordinary snowmelt high flows which are typically supply-limited, bedload waves cannot result from migrating bedload sheets at Squaw Creek. Grain-size spectra that coarsen and widen with flow during typical snowmelt discharges indicate that bedload transport occurs size-selective. Equal mobility would only be reached during enormous events at Squaw Creek.
Publisher	Fort Collins, CO : U.S.D.A., Forest Service, Rocky Mountain Forest and Range Experiment Station, 1996.
Subject	Bed load - - Montana - - Squaw Creek. ; <br> Sediment transport - - Montana - - Squaw Creek.
Source	A 13.88:RM-GTR-288
Date Original	1996-12-01
Date Digital	2007;
Type	text
Format	application/pdf
Resource Identifier	mtg002110
Contributing Institution	The University of Montana
Language	en
Digitization Specifications	Scanned by Lacey Gibbons using an OpticBook 3600 scanner at 400 dpi, 8 bit gray scale. Master images stored as TIFF and derivatives presented as PDF. Abbey FineReader 8.0 used for optical character recognition.

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Analyses of the temporal variation on coarse bedload transport and its grain size distribution : Squaw Creek, Montana, USA .

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