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A Sand-Gravel Gilbert Delta Subject to Base Level Change. / Chavarrías, Víctor; Blom, Astrid; Orrú, Clara; Martín-Vide, Juan Pedro; Viparelli, Enrica.

In: Journal of Geophysical Research: Earth Surface, Vol. 123, No. 5, 2018, p. 1160-1179.

Research output: Contribution to journalArticleScientificpeer-review

Harvard

Chavarrías, V, Blom, A, Orrú, C, Martín-Vide, JP & Viparelli, E 2018, 'A Sand-Gravel Gilbert Delta Subject to Base Level Change' Journal of Geophysical Research: Earth Surface, vol. 123, no. 5, pp. 1160-1179. https://doi.org/10.1029/2017JF004428

APA

Chavarrías, V., Blom, A., Orrú, C., Martín-Vide, J. P., & Viparelli, E. (2018). A Sand-Gravel Gilbert Delta Subject to Base Level Change. Journal of Geophysical Research: Earth Surface, 123(5), 1160-1179. https://doi.org/10.1029/2017JF004428

Vancouver

Chavarrías V, Blom A, Orrú C, Martín-Vide JP, Viparelli E. A Sand-Gravel Gilbert Delta Subject to Base Level Change. Journal of Geophysical Research: Earth Surface. 2018;123(5):1160-1179. https://doi.org/10.1029/2017JF004428

Author

Chavarrías, Víctor ; Blom, Astrid ; Orrú, Clara ; Martín-Vide, Juan Pedro ; Viparelli, Enrica. / A Sand-Gravel Gilbert Delta Subject to Base Level Change. In: Journal of Geophysical Research: Earth Surface. 2018 ; Vol. 123, No. 5. pp. 1160-1179.

BibTeX

@article{e01886348b6244398fd2e5b1a1ce3447,
title = "A Sand-Gravel Gilbert Delta Subject to Base Level Change",
abstract = "Laboratory experiments were conducted on a sand-gravel Gilbert delta to gain insight on its dynamics under varying base level. Base level rise results in intensified aggradation over the topset, as well as a decrease in topset slope and topset surface coarsening, the signals of which migrate in an upstream direction. Preferential deposition of coarse sediment in the topset results in a finer load at the topset-foreset break, which creates a fine signature in the foreset deposit. Base level fall has the opposite effects. Entrainment of the topset mobile armor causes a coarsening of the load at the topset-foreset break and so a coarse signature in the foreset deposit. The entrainment of the topset substrate and fine top part of the foreset may follow, which causes a fining of the load and a fine signature in the foreset deposit. The fact that the upstream sediment supply requires a certain slope and bed surface texture to be transported downstream under quasi-equilibrium conditions counteracts the effects of base level change. This information travels in the downstream direction. In nature base level change is likely so slow that the upstream sediment load maintains the topset slope and bed surface texture and so keeps the topset in a quasi-equilibrium state. Base level change is therefore not expected to leave a clear signal in a mixed-sediment Gilbert delta other than a change in elevation of the topset-foreset interface.",
keywords = "Gilbert delta, Image analysis, Mixed-sediment, Morphodynamics, Size stratification",
author = "V{\'i}ctor Chavarr{\'i}as and Astrid Blom and Clara Orr{\'u} and Mart{\'i}n-Vide, {Juan Pedro} and Enrica Viparelli",
year = "2018",
doi = "10.1029/2017JF004428",
language = "English",
volume = "123",
pages = "1160--1179",
journal = "Journal of Geophysical Research: Earth Surface",
issn = "2169-9003",
number = "5",

}

RIS

TY - JOUR

T1 - A Sand-Gravel Gilbert Delta Subject to Base Level Change

AU - Chavarrías, Víctor

AU - Blom, Astrid

AU - Orrú, Clara

AU - Martín-Vide, Juan Pedro

AU - Viparelli, Enrica

PY - 2018

Y1 - 2018

N2 - Laboratory experiments were conducted on a sand-gravel Gilbert delta to gain insight on its dynamics under varying base level. Base level rise results in intensified aggradation over the topset, as well as a decrease in topset slope and topset surface coarsening, the signals of which migrate in an upstream direction. Preferential deposition of coarse sediment in the topset results in a finer load at the topset-foreset break, which creates a fine signature in the foreset deposit. Base level fall has the opposite effects. Entrainment of the topset mobile armor causes a coarsening of the load at the topset-foreset break and so a coarse signature in the foreset deposit. The entrainment of the topset substrate and fine top part of the foreset may follow, which causes a fining of the load and a fine signature in the foreset deposit. The fact that the upstream sediment supply requires a certain slope and bed surface texture to be transported downstream under quasi-equilibrium conditions counteracts the effects of base level change. This information travels in the downstream direction. In nature base level change is likely so slow that the upstream sediment load maintains the topset slope and bed surface texture and so keeps the topset in a quasi-equilibrium state. Base level change is therefore not expected to leave a clear signal in a mixed-sediment Gilbert delta other than a change in elevation of the topset-foreset interface.

AB - Laboratory experiments were conducted on a sand-gravel Gilbert delta to gain insight on its dynamics under varying base level. Base level rise results in intensified aggradation over the topset, as well as a decrease in topset slope and topset surface coarsening, the signals of which migrate in an upstream direction. Preferential deposition of coarse sediment in the topset results in a finer load at the topset-foreset break, which creates a fine signature in the foreset deposit. Base level fall has the opposite effects. Entrainment of the topset mobile armor causes a coarsening of the load at the topset-foreset break and so a coarse signature in the foreset deposit. The entrainment of the topset substrate and fine top part of the foreset may follow, which causes a fining of the load and a fine signature in the foreset deposit. The fact that the upstream sediment supply requires a certain slope and bed surface texture to be transported downstream under quasi-equilibrium conditions counteracts the effects of base level change. This information travels in the downstream direction. In nature base level change is likely so slow that the upstream sediment load maintains the topset slope and bed surface texture and so keeps the topset in a quasi-equilibrium state. Base level change is therefore not expected to leave a clear signal in a mixed-sediment Gilbert delta other than a change in elevation of the topset-foreset interface.

KW - Gilbert delta

KW - Image analysis

KW - Mixed-sediment

KW - Morphodynamics

KW - Size stratification

UR - http://resolver.tudelft.nl/uuid:e0188634-8b62-4439-8fd2-e5b1a1ce3447

UR - http://www.scopus.com/inward/record.url?scp=85047788266&partnerID=8YFLogxK

U2 - 10.1029/2017JF004428

DO - 10.1029/2017JF004428

M3 - Article

VL - 123

SP - 1160

EP - 1179

JO - Journal of Geophysical Research: Earth Surface

T2 - Journal of Geophysical Research: Earth Surface

JF - Journal of Geophysical Research: Earth Surface

SN - 2169-9003

IS - 5

ER -

ID: 45356542