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 language | English |
|---|---|
| Title of host publication | River Flow 2018 - Ninth International Conference on Fluvial Hydraulics |
| Editors | A. Paquier, N. Rivière |
| Publisher | EDP Sciences |
| Number of pages | 5 |
| Volume | 40 |
| DOIs | |
| Publication status | Published - 5 Sep 2018 |
| Event | 9th International Conference on Fluvial Hydraulics, River Flow 2018 - Lyon-Villeurbanne, France Duration: 5 Sep 2018 → 8 Sep 2018 |
Publication series
| Name | E3S Web of Conferences |
|---|---|
| Publisher | EDP Sciences |
| ISSN (Print) | 2101-6275 |
Conference
| Conference | 9th International Conference on Fluvial Hydraulics, River Flow 2018 |
|---|---|
| Country | France |
| City | Lyon-Villeurbanne |
| Period | 5/09/18 → 8/09/18 |
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Experimental investigation of low-angle dune morphodynamics. / Naqshband, Suleyman; Wullems, Bas; de Ruijsscher, Timo; Hoitink, Ton.
River Flow 2018 - Ninth International Conference on Fluvial Hydraulics. ed. / A. Paquier; N. Rivière. Vol. 40 EDP Sciences, 2018. 02056 (E3S Web of Conferences).Research output: Chapter in Book/Report/Conference proceeding › Conference paper
TY - GEN
T1 - Experimental investigation of low-angle dune morphodynamics
AU - Naqshband, Suleyman
AU - Wullems, Bas
AU - de Ruijsscher, Timo
AU - Hoitink, Ton
PY - 2018/9/5
Y1 - 2018/9/5
N2 - 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.
AB - 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.
U2 - 10.1051/e3sconf/20184002056
DO - 10.1051/e3sconf/20184002056
M3 - Conference paper
VL - 40
T3 - E3S Web of Conferences
BT - River Flow 2018 - Ninth International Conference on Fluvial Hydraulics
A2 - Paquier, A.
A2 - Rivière, N.
PB - EDP Sciences
ER -