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Impact of flow variability and sediment characteristics on channel width evolution in laboratory streams. / Vargas-Luna, Andrés; Crosato, Alessandra; Byishimo, Protogene; Uijttewaal, Wim S.J.

In: Journal of Hydraulic Research, 17.04.2018, p. 1-11.

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@article{fe7811cc6f3742a0aa81f638d1317f39,
title = "Impact of flow variability and sediment characteristics on channel width evolution in laboratory streams",
abstract = "Alluvial rivers are shaped by sequences of water flows excavating their channels. Observations show that besides the magnitude, the frequency and duration of streamflow oscillations might also be important for the river channel formation. In addition, the river morphology appears influenced by both size and degree of uniformity of the sediment. Nevertheless, many morphodynamic studies still represent the flow regime with a single value of the discharge, often corresponding to the bankfull condition, and the sediment with its median grain size. This work investigates the effects of streamflow variability and sediment characteristics on channel width formation, analysing the evolution of experimental streams with different sediments and discharge hydrographs. Results show that the formative condition of the channel width is not the geometric bankfull flow but a rather frequent peak flow. Remarkably different channel configurations arise from different sediment characteristics in the laboratory, where sediment non-uniformity produces more stable banks.",
keywords = "bankfull discharge, channel width, laboratory experiments, River morphodynamics, sediment gradation, streamflow variability",
author = "Andr{\'e}s Vargas-Luna and Alessandra Crosato and Protogene Byishimo and Uijttewaal, {Wim S.J.}",
note = "Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.",
year = "2018",
month = "4",
day = "17",
doi = "10.1080/00221686.2018.1434836",
language = "English",
pages = "1--11",
journal = "Journal of Hydraulic Research",
issn = "0022-1686",
publisher = "International Association of Hydraulic Engineering Research",

}

RIS

TY - JOUR

T1 - Impact of flow variability and sediment characteristics on channel width evolution in laboratory streams

AU - Vargas-Luna, Andrés

AU - Crosato, Alessandra

AU - Byishimo, Protogene

AU - Uijttewaal, Wim S.J.

N1 - Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

PY - 2018/4/17

Y1 - 2018/4/17

N2 - Alluvial rivers are shaped by sequences of water flows excavating their channels. Observations show that besides the magnitude, the frequency and duration of streamflow oscillations might also be important for the river channel formation. In addition, the river morphology appears influenced by both size and degree of uniformity of the sediment. Nevertheless, many morphodynamic studies still represent the flow regime with a single value of the discharge, often corresponding to the bankfull condition, and the sediment with its median grain size. This work investigates the effects of streamflow variability and sediment characteristics on channel width formation, analysing the evolution of experimental streams with different sediments and discharge hydrographs. Results show that the formative condition of the channel width is not the geometric bankfull flow but a rather frequent peak flow. Remarkably different channel configurations arise from different sediment characteristics in the laboratory, where sediment non-uniformity produces more stable banks.

AB - Alluvial rivers are shaped by sequences of water flows excavating their channels. Observations show that besides the magnitude, the frequency and duration of streamflow oscillations might also be important for the river channel formation. In addition, the river morphology appears influenced by both size and degree of uniformity of the sediment. Nevertheless, many morphodynamic studies still represent the flow regime with a single value of the discharge, often corresponding to the bankfull condition, and the sediment with its median grain size. This work investigates the effects of streamflow variability and sediment characteristics on channel width formation, analysing the evolution of experimental streams with different sediments and discharge hydrographs. Results show that the formative condition of the channel width is not the geometric bankfull flow but a rather frequent peak flow. Remarkably different channel configurations arise from different sediment characteristics in the laboratory, where sediment non-uniformity produces more stable banks.

KW - bankfull discharge

KW - channel width

KW - laboratory experiments

KW - River morphodynamics

KW - sediment gradation

KW - streamflow variability

UR - http://www.scopus.com/inward/record.url?scp=85045660270&partnerID=8YFLogxK

U2 - 10.1080/00221686.2018.1434836

DO - 10.1080/00221686.2018.1434836

M3 - Article

SP - 1

EP - 11

JO - Journal of Hydraulic Research

T2 - Journal of Hydraulic Research

JF - Journal of Hydraulic Research

SN - 0022-1686

ER -

ID: 44891676