Experimental investigation of low-angle dune morphodynamics

Suleyman Naqshband*, Bas Wullems, Timo de Ruijsscher, Ton Hoitink

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference paperAcademicpeer-review

Abstract

Dunes commonly dominate the bed of sandy rivers and they are of central importance in predicting flow resistance and water levels. In the present study, we show that by using light-weight polystyrene particles as substrate in a laboratory setting, promising morphodynamic similarity is obtained between dunes in shallow flow (flume) and deep flow (field) conditions. In particular, results from our flume experiments show that dune lee-side angles, which are crucial in turbulence production and energy dissipation, better approximate dune lee-side angles observed in natural channels. Furthermore, dune height evolution towards upper stage plane bed observed in the present experimental study, closely follows dune height evolution as observed in world's large rivers.

Original languageEnglish
Title of host publicationRiver Flow 2018 - Ninth International Conference on Fluvial Hydraulics
EditorsA. Paquier, N. Rivière
PublisherEDP Sciences
Number of pages5
Volume40
DOIs
Publication statusPublished - 5 Sep 2018
Event9th International Conference on Fluvial Hydraulics, River Flow 2018 - Lyon-Villeurbanne, France
Duration: 5 Sep 20188 Sep 2018

Publication series

NameE3S Web of Conferences
PublisherEDP Sciences
ISSN (Print)2101-6275

Conference

Conference9th International Conference on Fluvial Hydraulics, River Flow 2018
CountryFrance
CityLyon-Villeurbanne
Period5/09/188/09/18

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