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Journal Article
Published: 29 November 2023
Journal of Sedimentary Research (2023) 93 (11): 825–839.
... of approximately 0.3 and 0.1 mm, which were determined to be equivalent to bedload gravel and suspended sand in a real-scale river using dimensional analysis. The results of the experiments revealed three important findings: 1) Crevasse-splay deposits initially developed an asymmetric shape extending downstream...
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Journal Article
Journal: Geology
Published: 27 September 2023
Geology (2023) 51 (12): 1122–1126.
... is the combination of sediment bedload, suspended solids, dissolved solutes from quick flow (overland storm runoff), and groundwater baseflow. Additional mass is transported to and from the oceans by the aeolian process. Geogenic continental bedload and suspended solids mass flux has been estimated at between 12.6...
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Journal Article
Journal: Geology
Published: 27 July 2023
Geology (2023) 51 (10): 924–928.
... fluvial re-establishment. In the 12 months post-event, 7.0 ± 1.5 Mm 3 (67.2%) of the deposit volume was removed along a 30-km-long domain and the median erosion rate was 2.3 ± 1.1 m a –1 . Most sediment was removed by pre-monsoon and monsoon river flows, which conveyed bedload waves traveling at 0.1–0.3...
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Journal Article
Journal: GSA Bulletin
Published: 07 February 2023
GSA Bulletin (2023) 135 (9-10): 2648–2663.
... for the interpretation of the changing DZ record. There has often been the assumption that zircon grains are transported in the bedload when they are sand-sized because this mineral is especially dense (4.6 g/cm 3 compared to 2.65 g/cm 3 for quartz). As a result, zircon grains would travel more slowly than suspended...
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Series: GSA Special Papers
Published: 12 August 2021
DOI: 10.1130/2018.2536(04)
EISBN: 9780813795362
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Journal Article
Journal: GSA Bulletin
Published: 11 January 2021
GSA Bulletin (2021) 133 (9-10): 1851–1874.
... , https://doi.org/10.1002/9781119952497.ch29 Turowski , J.M. , Rickenmann , D. , and Dadson , S.J. , 2010 , The partitioning of the total sediment load of a river into suspended load and bedload: A review of empirical data : Sedimentology , v. 57 , p. 1126 – 1146 , https://doi.org...
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Journal Article
Journal: Geology
Published: 25 November 2020
Geology (2021) 49 (4): 422–427.
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Series: Geological Society, London, Memoirs
Published: 16 November 2020
DOI: 10.1144/M53.2
EISBN: 9781786205278
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Journal Article
Published: 04 November 2020
Journal of the Geological Society (2021) 178 (1): jgs2020-094.
... accompanies the occurrence of root traces. Interpretation . The overall normally graded nature of the LF indicates a waning flow. The superposition of the increasing angle of climb points to an increasing rate of suspension fallout relative to bedload migration ( Allen 1982 ; Chaudhuri 2005 ; García...
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Journal Article
Journal: GSA Bulletin
Published: 28 October 2020
GSA Bulletin (2021) 133 (5-6): 1141–1156.
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Journal Article
Journal: Geology
Published: 01 August 2020
Geology (2020) 48 (8): e506.
... morphology is only possible for large dunes. Best et al. also argue that the occasional presence of HADs in a LAD dune field disproves the liquefaction theory, but HAD morphology may arise due to local bedload-dominated conditions within the field. Best et al. appeal to Cisneros et al. (2020) to support...
Journal Article
Journal: Interpretation
Published: 11 May 2020
Interpretation (2020) 8 (3): SM39–SM52.
... the lateral flanks of the effluent, a steep velocity gradient causes deposition of bedload, which forms pronounced subaqueous levees, that undergo minimal divergence as the channels prograde, and the flow converges near the bed ( Wright, 1977 ). The development of levees indicates a relatively stable channel...
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Journal Article
Published: 09 April 2020
Journal of the Geological Society (2020) 177 (4): 766–783.
... displays characteristics of confined–uncontained turbidites: grain-size breaks and coarse bedload indicative of ubiquitous flow bypass; short-range grain-size fractionation across flow; stacked sandy bed-sets in the flow axes. We reconstruct sand fairways for over 300 km across the region and propose...
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Journal Article
Journal: Geology
Published: 14 February 2020
Geology (2020) 48 (5): 468–472.
... , https://doi.org/10.1029/WR025i004p00627 . Attal , M. , and Lavé , J. , 2006 , Changes of bedload characteristics along the Marsyandi River (central Nepal): Implications for understanding hillslope sediment supply, sediment load evolution along fluvial networks, and denudation in active...
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Journal Article
Journal: Geology
Published: 22 November 2019
Geology (2020) 48 (2): 149–153.
...Rebecca A. Hodge; Hal Voepel; Julian Leyland; David A. Sear; Sharif Ahmed Abstract The critical shear stress (τ c ) for grain entrainment is a poorly constrained control on bedload transport rates in rivers. Direct calculations of τ c have been hindered by the inability to measure the geometry...
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Journal Article
Journal: Geology
Published: 20 August 2019
Geology (2019) 47 (10): 919–922.
... pore pressures that occur during the failure of thick, loosely packed deposits can produce liquefied avalanches that flow and stop on gentle gradients. As lee-side angles decrease over LADs, downslope currents increase in strength, accelerating avalanches, transporting bedload, and creating smaller...
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Journal Article
Journal: GSA Bulletin
Published: 02 April 2019
GSA Bulletin (2019) 131 (9-10): 1480–1500.
..., with consequent input of sediment into river channels ( Moody and Martin, 2009 ; Silins et al., 2009 ; Lamb et al., 2011 ; Florsheim et al., 2016 ) or debris flows ( Cannon et al., 2001 ). Both bedload ( Beaty, 1994 ) and suspended sediment concentrations ( Malmon et al., 2007 ; Ryan et al., 2011 ) typically...
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Series: GSA Special Papers
Published: 28 December 2018
DOI: 10.1130/2018.2540(09)
EISBN: 9780813795409
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Series: GSA Field Guide
Published: 10 December 2018
DOI: 10.1130/2018.0051(05)
EISBN: 9780813756516
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Journal Article
Published: 16 October 2018
Journal of Sedimentary Research (2018) 88 (10): 1190–1204.
... simulations highlight that the drawdown condition is reached for water discharges > 2,000 m 3 s –1 , and generates high bed shear stress close to the dam, which promotes transport of coarse-grained sediment as bedload ( Fig. 12 ). The condition of low flow discharge and associated backwater profiles...
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