Standard

Advance, Retreat, and Halt of Abrupt Gravel-Sand Transitions in Alluvial Rivers. / Blom, Astrid; Chavarrias Borras, Victor; Ferguson, Robert I.; Viparelli, Enrica.

In: Geophysical Research Letters, Vol. 44, No. 19, 16.10.2017, p. 9751-9760.

Research output: Contribution to journalArticleScientificpeer-review

Harvard

Blom, A, Chavarrias Borras, V, Ferguson, RI & Viparelli, E 2017, 'Advance, Retreat, and Halt of Abrupt Gravel-Sand Transitions in Alluvial Rivers' Geophysical Research Letters, vol. 44, no. 19, pp. 9751-9760. https://doi.org/10.1002/2017GL074231

APA

Vancouver

Author

Blom, Astrid ; Chavarrias Borras, Victor ; Ferguson, Robert I. ; Viparelli, Enrica. / Advance, Retreat, and Halt of Abrupt Gravel-Sand Transitions in Alluvial Rivers. In: Geophysical Research Letters. 2017 ; Vol. 44, No. 19. pp. 9751-9760.

BibTeX

@article{842174efdf1745aeb5586920b8171548,
title = "Advance, Retreat, and Halt of Abrupt Gravel-Sand Transitions in Alluvial Rivers",
abstract = "Downstream fining of bed sediment in alluvial rivers is usually gradual, but often an abrupt decrease in characteristic grain size occurs from about 10 to 1 mm, i.e., a gravel-sand transition (GST) or gravel front. Here we present an analytical model of GST migration that explicitly accounts for gravel and sand transport and deposition in the gravel reach, sea level change, subsidence, and delta progradation. The model shows that even a limited gravel supply to a sand bed reach induces progradation of a gravel wedge and predicts the circumstances required for the gravel front to advance, retreat, and halt. Predicted modern GST migration rates agree well with measured data at Allt Dubhaig and the Fraser River, and the model qualitatively captures the behavior of other documented gravel fronts. The analysis shows that sea level change, subsidence, and delta progradation have a significant impact on the GST position in lowland rivers.",
keywords = "alluvial rivers, gravel bed rivers, gravel front, gravel-sand transition, mixed-size sediment, sand bed rivers",
author = "Astrid Blom and {Chavarrias Borras}, Victor and Ferguson, {Robert I.} and Enrica Viparelli",
year = "2017",
month = "10",
day = "16",
doi = "10.1002/2017GL074231",
language = "English",
volume = "44",
pages = "9751--9760",
journal = "Geophysical Research Letters",
issn = "0094-8276",
publisher = "American Geophysical Union",
number = "19",

}

RIS

TY - JOUR

T1 - Advance, Retreat, and Halt of Abrupt Gravel-Sand Transitions in Alluvial Rivers

AU - Blom, Astrid

AU - Chavarrias Borras, Victor

AU - Ferguson, Robert I.

AU - Viparelli, Enrica

PY - 2017/10/16

Y1 - 2017/10/16

N2 - Downstream fining of bed sediment in alluvial rivers is usually gradual, but often an abrupt decrease in characteristic grain size occurs from about 10 to 1 mm, i.e., a gravel-sand transition (GST) or gravel front. Here we present an analytical model of GST migration that explicitly accounts for gravel and sand transport and deposition in the gravel reach, sea level change, subsidence, and delta progradation. The model shows that even a limited gravel supply to a sand bed reach induces progradation of a gravel wedge and predicts the circumstances required for the gravel front to advance, retreat, and halt. Predicted modern GST migration rates agree well with measured data at Allt Dubhaig and the Fraser River, and the model qualitatively captures the behavior of other documented gravel fronts. The analysis shows that sea level change, subsidence, and delta progradation have a significant impact on the GST position in lowland rivers.

AB - Downstream fining of bed sediment in alluvial rivers is usually gradual, but often an abrupt decrease in characteristic grain size occurs from about 10 to 1 mm, i.e., a gravel-sand transition (GST) or gravel front. Here we present an analytical model of GST migration that explicitly accounts for gravel and sand transport and deposition in the gravel reach, sea level change, subsidence, and delta progradation. The model shows that even a limited gravel supply to a sand bed reach induces progradation of a gravel wedge and predicts the circumstances required for the gravel front to advance, retreat, and halt. Predicted modern GST migration rates agree well with measured data at Allt Dubhaig and the Fraser River, and the model qualitatively captures the behavior of other documented gravel fronts. The analysis shows that sea level change, subsidence, and delta progradation have a significant impact on the GST position in lowland rivers.

KW - alluvial rivers

KW - gravel bed rivers

KW - gravel front

KW - gravel-sand transition

KW - mixed-size sediment

KW - sand bed rivers

UR - http://www.scopus.com/inward/record.url?scp=85031418266&partnerID=8YFLogxK

UR - http://resolver.tudelft.nl/uuid:842174ef-df17-45ae-b558-6920b8171548

U2 - 10.1002/2017GL074231

DO - 10.1002/2017GL074231

M3 - Article

VL - 44

SP - 9751

EP - 9760

JO - Geophysical Research Letters

T2 - Geophysical Research Letters

JF - Geophysical Research Letters

SN - 0094-8276

IS - 19

ER -

ID: 36750817