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pool-and-riffle pattern

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Journal Article
Journal: GSA Bulletin
Published: 01 April 1986
GSA Bulletin (1986) 97 (4): 410–420.
...JIM E. O'CONNOR; ROBERT H. WEBB; VICTOR R. BAKER Abstract The low-flow channel morphology of Boulder Creek is characterized by a well-developed pool-and-riffle pattern. The riffles consist of accumulations of basaltic boulders deposited from upstream source areas during extremely large flows...
Series: Geological Society, London, Special Publications
Published: 01 January 2002
DOI: 10.1144/GSL.SP.2002.191.01.09
EISBN: 9781862394391
... morphology may improve understanding of how these meso-scale bedforms are controlled by sediment supply, which is known to be a first-order control on the pattern and distribution of sedimentary facies in depositional basins ( Houvis & Leeder 1998 ). Rifflepool maintenance Tractive force reversal...
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Journal Article
Journal: GSA Bulletin
Published: 01 May 1972
GSA Bulletin (1972) 83 (5): 1531–1536.
... spacing appears to be independent of channel pattern, and as straight reaches merge with meandering reaches no change occurs in the spacing, form, or symmetry of the pools and riffles. Meandering processes which result in increasing channel length may result in the addition of new pools o t keep spacing...
Journal Article
Published: 01 September 1987
Journal of Sedimentary Research (1987) 57 (5): 863–870.
... confined to a sequence of upstream-migrating topographic steps (pools and riffles), a stable channel geometry. Antidunes and upperflow-regime plane beds are arranged in an organized pattern on the surface of pool and riffle sequences as a response to spatially varied flow conditions. In the creek...
Journal Article
Journal: GSA Bulletin
Published: 01 May 1997
GSA Bulletin (1997) 109 (5): 596–611.
...David R. Montgomery; John M. Buffington Abstract A classification of channel-reach morphology in mountain drainage basins synthesizes stream morphologies into seven distinct reach types: colluvial, bedrock, and five alluvial channel types (cascade, step pool, plane bed, pool riffle, and dune ripple...
Journal Article
Published: 01 January 2003
The Journal of Geology (2003) 111 (1): 103–114.
.... ; Wasserman , W. ; and Kutner , M. H. 1990 . Applied linear statistical models: regression, analysis of variance, and experimental designs . Homewood, Ill ., Irwin , 1181 p. O'Connor , J. E. ; Webb , R. H. ; and Baker , V. R. 1986 . Paleohydrology of pool-and-riffle pattern...
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Series: GSA Special Papers
Published: 15 February 2024
DOI: 10.1130/2024.2562(01)
EISBN: 9780813795621
... following fire and postfire floods. Basin-scale burn patterns were associated with increases in sediment deposition, reduction in pool and riffle habitat extents, and changes in particulate organic matter during the first and second years after fires; impacts subsided about a year after the first...
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Journal Article
Journal: GSA Bulletin
Published: 01 May 1983
GSA Bulletin (1983) 94 (5): 673–678.
... streams at bankfull stage. All of the reaches have fairly well-developed riffle-pool sequences and are either straight or braided in channel pattern. Measurements were made at numerous locations within each reach so that the influence of hydraulic and resistance variables on water-surface slope could...
Published: 01 January 1980
DOI: 10.1130/SPE183-p125
.... In fact, slope adjusts but little to a change in amount of introduced sediment load. The adjustment takes place principally among other hydraulic factors: width, depth, velocity, bed forms, channel pattern, and pool-riffle sequence. Gilbert sensed this complicated adjustment process, but its details...
Journal Article
Journal: GSA Bulletin
Published: 01 May 2007
GSA Bulletin (2007) 119 (5-6): 556–575.
... incision and the pattern of river profile adjustment are determined by the mobility of material in riffles. Figure 6. Continued. Figure 7. Magnitude of decrease in thalweg elevation from 1956 to 2000 at the 10 monitoring cross sections, grouped by riffles (A) and pools (B). Each cross...
FIGURES | View All (21)
Journal Article
Journal: GSA Bulletin
Published: 01 September 2001
GSA Bulletin (2001) 113 (9): 1205–1212.
... tens of meters to tens of kilometers in length, with consistent channel geometry in the sense that the entire reach fits into one of the categories in Fig. 1, such as pool riffle.) Previous work has demonstrated that the erosion rate law first proposed by Howard and Kerby (1983...
FIGURES | View All (5)
Journal Article
Journal: GSA Bulletin
Published: 01 December 2000
GSA Bulletin (2000) 112 (12): 1814–1824.
... of single channels to braided channels ( Roberts and Church, 1986 ); (5) decrease in the number of pools in conjunction with an increase in riffles followed by an increase in pool frequency and depth ( Madej and Ozaki, 1996 ); (6) construction of terraces ( Hack and Goodlett, 1960 ; Kochel et al., 1987...
FIGURES | View All (13)
Journal Article
Journal: GSA Bulletin
Published: 05 June 2018
GSA Bulletin (2018) 130 (11-12): 1859–1874.
..., and alluvial fans confine 64% of the channel’s lateral boundaries, while bedrock exposures impose vertical confinement along 37% of the channel. Bedrock exposures in the bed separate pools and riffles developed in gravelly bed material, create unusual kilometer-long pools, and divide the study area...
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Journal Article
Published: 01 August 2014
Environmental & Engineering Geoscience (2014) 20 (3): 287–304.
.... (A) Map of stream reach locations in northeast Virginia and (B) regional map showing location of map in panel a. Table 1. Watershed-level characteristics. The stream reaches generally exhibited pool-riffle morphology with forested banks ( Figure 2A–C ). Signs of straightening...
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Journal Article
Published: 11 April 2002
Canadian Journal of Earth Sciences (2002) 39 (4): 493–503.
... stair-like patterning of step-pools and cascades has led most researchers to visually identify bedforms based on flow or morphologic characteristics, or both. Yet, in an early study of stepped-bed geometry, Hayward ( 1980 ) realized that different workers surveying the same reach on Torlesse Creek...
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Journal Article
Published: 01 January 2001
The Journal of Geology (2001) 109 (1): 21–33.
... attention in the past decade (Church 1992 ; Rosgen 1994 ; van Niekerk et al. 1995 ; Newson et al. 1998 ). Differentiation has been made on a variety of grounds, including channel size and gradient, with step-pool channels characterizing upland watercourses and riffle-pool sequences in lowland alluvial...
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Journal Article
Published: 01 January 2000
The Journal of Geology (2000) 108 (1): 121–129.
.... These upstream channel segments are formed in cobble to boulder alluvium. The alluvial reach above Little Box Canyon ( fig. 2 ) has a step-pool morphology; the reach above Big Box Canyon changes from pool-riffle to step-pool as it approaches the canyon. Downstream from each canyon the highly weathered...
FIGURES | View All (7)
Journal Article
Journal: GSA Bulletin
Published: 01 March 1990
GSA Bulletin (1990) 102 (3): 340–352.
... of variation. Field studies in two streams in the Cascade Range in Oregon indicated that pool, riffle, rapid, cascade, and step channel units had distinct bed slope ranges, with average slopes of 0.005, 0.011, 0.029, 0.055, and 0.173, respectively. Steeper units (rapids and cascades) are composed of step-pool...
Journal Article
Published: 01 January 2022
Russ. Geol. Geophys. (2022) 63 (1): 98–108.
... that linear anomalies with high electrical resistivity identified in floodplains correspond to gold-promising stream pool and riffle facies. It is concluded from working with alluvial placers in Kamchatka, Altai, and the Baikal Region that electrical resistivity tomography has a high resolution for solving...
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Journal Article
Published: 01 December 2013
Journal of Sedimentary Research (2013) 83 (12): 1066–1084.
... ( Fig. 17A ). The expansional growth of the study bar fits with the model of open-bend flows, which can also explain erosion in the axial part of the riffle zone and downstream-migrating unit bars during subsequent downstream accretion. Fig. 17 Depositional model. A) Flow pattern and sediment...
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