Coarse Sediment Transport by Flood Flows on Knik River, Alaska

Bradley, William C.; Fahnestock, Robert K.; Rowekamp, E. T

doi:10.1130/0016-7606(1972)83[1261:cstbff]2.0.co;2

Cited by 79 publications

(32 citation statements)

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“…A longitudinal reduction in the calibre of alluvial sediments is a common phenomenon along gravel-bed rivers, which has been of interest to fluvial geomorphologists for some time (Sternberg, 1875;Bradley et al, 1972;Knighton, 1980;Dawson, 1988;Ferguson and Wathen, 1998). The downstream decline in the mean grain size is typically described by a negative exponential law (Sternberg, 1875); and irregularities or scatter about this trend are often related to tributary entry points (Knighton, 1980).…”

Section: Introductionmentioning

confidence: 97%

Sedimentary links and the spatial organization of Atlantic salmon (Salmo salar) spawning habitat in a Canadian Shield river

Davey¹,

Lapointe²

2007

Geomorphology

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Section: Introductionmentioning

confidence: 97%

Sedimentary links and the spatial organization of Atlantic salmon (Salmo salar) spawning habitat in a Canadian Shield river

Davey¹,

Lapointe²

2007

Geomorphology

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“…An alternative to tumbling barrels, in the form of a circular flume in which water is moved to transport particles across an abrading bed, was originally constructed by Schoklitsch (1933). This was further developed by Kuenen (1956a,b) and Bradley (1970;Bradley et al, 1972). Table II gives brief characteristics of the tanks used to date together with those of the abrasion tank used for the present experiments, which is itself illustrated in Figure 3.…”

Section: Introductionmentioning

confidence: 98%

Laboratory simulation of clast abrasion

Lewin

Brewer

2002

Earth Surf Processes Landf

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Brewer, Paul, Lewin, J., (2002) 'Laboratory simulation of clast abrasion', Earth Surface Processes and Landforms 27 pp.145-164 RAE2008Experimental abrasion of river-bed materials has been widely undertaken, producing downstream fining rates that generally are believed to be much less than those observed in the field. A conclusion commonly adopted has been that sorting processes are more effective than abrasion processes. A comparative evaluation of results from an abrasion tank and a tumbling barrel are presented, which show that abrasion patterns and rates differ according to the equipment used, clast size and shape, the clast charge (barrel) and water velocity and bed material (tank). Abrasion is a composite process, and the effects achieved appear to be dominated by percussion in the tank and grinding in the barrel. Breakage, crushing and sandblasting are not modelled effectively, nor are effects achieved on clasts when they form part of the bed. Comparisons are made with other equipment used, the very limited amount of direct field abrasion monitoring, and with the probable suite of processes that may occur under field conditions. Also reviewed are the problems that arise when laboratory weight-loss abrasion coefficients are used or converted into ones of size diminution, as usually derived from field observations of down-channel trends. It is concluded that field abrasion rates generally have been underestimated, as the processes involved are at best only selectively represented by the experimental equipment so far used, and because the results obtained experimentally are capable of misinterpretation when related to field trends.Peer reviewe

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“…1966Richardson. 1968Maag, 1969Fahnestock et ai, 1969Post et Mayo, 1971Bradley et al, 1972Vivian, 1974 Jackson, 1979Young, 1980Xu, 1981Yanamaka, 1982Beecorft, 1983Hewitt, 1964Qinghua, 1991Haeberh, 1983Clague et al, 1985Blown et Church, 1985Fushimi et al, 1985Clague, 1987Vuichard et Zimmerman, 1986. 1987 McCarrol et Matthews, 1989 …”

Section: Tableau Iunclassified

Éléments d’identification des modelés fluvioglaciaires issus des débâcles glaciaires

Robitaille¹,

Dubois²

2007

gpq

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RÉSUMÉLa description géomorphologique de la vallée de la Petite rivière Pikauba remodelée par une crue consécutive à la rupture du barrage Beloeil permet de mettre en lumière des transformations majeures. Le corridor fluvial touché, initialement tapissé de till épais, montre maintenant diverses formes d'érosion et de sédimentation qui révèlent d'étonnantes similitudes avec celles des modelés fluvioglaciaires de débâcle glaciaire, soit des crues fluvioglaciaires catastrophiques associées au déversement brusque et violent de lacs glaciaires. Les éléments d'identification les plus manifestes des modelés fluvioglaciaires de débâcles glaciaires sont : les cuvettes glaciolacustres asséchées, les barrages morainiques entaillés, les « accumulations en nappe de débâcle glaciaire » (terme proposé comme équivalent d'outburst deposit), les entailles d'érosion profondes dans le till, les terrasses d'érosion dans le till, les bancs et îlots de sédimentation fine, les formes d'érosion dans le roc. Les débâcles glaciaires correspondent à une activité de grande puissance pouvant provoquer de profondes modifications géomorphologiques. En conséquence, elles méritent d'être sérieusement considérées dans la reconstitution des environnements proglaciaires. L'application des éléments d'identification à quelques sites québécois a permis de révéler des modelés fluvioglaciaires de débâcle glaciaire qui n'avaient pas été interprétés ainsi au départ.

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Coarse Sediment Transport by Flood Flows on Knik River, Alaska

Cited by 79 publications

References 0 publications

Sedimentary links and the spatial organization of Atlantic salmon (Salmo salar) spawning habitat in a Canadian Shield river

Sedimentary links and the spatial organization of Atlantic salmon (Salmo salar) spawning habitat in a Canadian Shield river

Laboratory simulation of clast abrasion

Éléments d’identification des modelés fluvioglaciaires issus des débâcles glaciaires

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