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

In: E3S Web of Conferences, Vol. 40, 05044, 05.09.2018.

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@article{d1c519836aa442459202086c8a1bdf2b,
title = "Impact of flow variability and sediment characteristics on channel width evolution",
abstract = "Alluvial rivers are shaped by sequences of water flows excavating their channels. Observations show that besides the magnitude, also the frequency and duration of streamflow oscillations might be important for the river channel formation. In addition, the river morphology appears influenced also 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.",
author = "Andr{\'e}s Vargas-Luna and Alessandra Crosato and Protogene Byishimo and Wim Uijttewaal",
year = "2018",
month = "9",
day = "5",
doi = "10.1051/e3sconf/20184005044",
language = "English",
volume = "40",
journal = "E3S Web of Conferences",
issn = "2555-0403",
publisher = "EDP Sciences",

}

RIS

TY - JOUR

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

AU - Vargas-Luna, Andrés

AU - Crosato, Alessandra

AU - Byishimo, Protogene

AU - Uijttewaal, Wim

PY - 2018/9/5

Y1 - 2018/9/5

N2 - Alluvial rivers are shaped by sequences of water flows excavating their channels. Observations show that besides the magnitude, also the frequency and duration of streamflow oscillations might be important for the river channel formation. In addition, the river morphology appears influenced also 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, also the frequency and duration of streamflow oscillations might be important for the river channel formation. In addition, the river morphology appears influenced also 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.

UR - http://www.scopus.com/inward/record.url?scp=85053809867&partnerID=8YFLogxK

UR - http://resolver.tudelft.nl/uuid:d1c51983-6aa4-4245-9202-086c8a1bdf2b

U2 - 10.1051/e3sconf/20184005044

DO - 10.1051/e3sconf/20184005044

M3 - Conference article

VL - 40

JO - E3S Web of Conferences

T2 - E3S Web of Conferences

JF - E3S Web of Conferences

SN - 2555-0403

M1 - 05044

ER -

ID: 47062449