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Dune morphology and hysteresis in alluvial channels during long-duration floods revealed using high temporal-resolution MBES bathymetry. / Cisneros, Julia; Best, Jim; van Dijk, Thaiënne A G P; Mosselman, Erik.

Proceedings of the International conference Marine and River Dune Dynamics 2019: 1-3 April 2019, Bremen Germany. ed. / Alice Lefebvre; Thierry Garlan; Christian Winter. SHOM, 2019. p. 51-56.

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

Harvard

Cisneros, J, Best, J, van Dijk, TAGP & Mosselman, E 2019, Dune morphology and hysteresis in alluvial channels during long-duration floods revealed using high temporal-resolution MBES bathymetry. in A Lefebvre, T Garlan & C Winter (eds), Proceedings of the International conference Marine and River Dune Dynamics 2019: 1-3 April 2019, Bremen Germany. SHOM, pp. 51-56, 6th edi­ti­on of the International Conference on Ma­ri­ne and Ri­ver Dune Dy­na­mics, Bremen, Germany, 1/04/19.

APA

Cisneros, J., Best, J., van Dijk, T. A. G. P., & Mosselman, E. (2019). Dune morphology and hysteresis in alluvial channels during long-duration floods revealed using high temporal-resolution MBES bathymetry. In A. Lefebvre, T. Garlan, & C. Winter (Eds.), Proceedings of the International conference Marine and River Dune Dynamics 2019: 1-3 April 2019, Bremen Germany (pp. 51-56). SHOM.

Vancouver

Cisneros J, Best J, van Dijk TAGP, Mosselman E. Dune morphology and hysteresis in alluvial channels during long-duration floods revealed using high temporal-resolution MBES bathymetry. In Lefebvre A, Garlan T, Winter C, editors, Proceedings of the International conference Marine and River Dune Dynamics 2019: 1-3 April 2019, Bremen Germany. SHOM. 2019. p. 51-56

Author

Cisneros, Julia ; Best, Jim ; van Dijk, Thaiënne A G P ; Mosselman, Erik. / Dune morphology and hysteresis in alluvial channels during long-duration floods revealed using high temporal-resolution MBES bathymetry. Proceedings of the International conference Marine and River Dune Dynamics 2019: 1-3 April 2019, Bremen Germany. editor / Alice Lefebvre ; Thierry Garlan ; Christian Winter. SHOM, 2019. pp. 51-56

BibTeX

@inproceedings{6b432c0a215c4be5aa552323a1fdc371,
title = "Dune morphology and hysteresis in alluvial channels during long-duration floods revealed using high temporal-resolution MBES bathymetry",
abstract = "In natural rivers, flow discharge may fluctuate across a range of time scales – from diurnal to seasonal - but is often most pronounced during hydrographs that may encompass long-duration floods. Under these varying flows, bedforms can be created and modified by the flow without achieving any ‘equilibrium’ state. A lag between changes in flow and the morphological response of the bedforms, termed bedform hysteresis, is commonly present. Importantly for channel management and navigation, since dunes may grow larger during floods, but often experience a lagged decay in size during lowering water levels, critical water depths may be reached for inland shipping. There is also a consensus that dunes possess a more flattened shape, and lower leeside angle, than previously assumed in large rivers and that such dunes do not exhibit a region of permanent flow separation downstream of the dune. This different leeside shape thus questions traditional ideas of flow interactions with dunes, where flow separation in the steep dune lee side leads to energy loss (form drag) that increases flow resistance and energy expenditure within the flow. This paper quantifies dune hysteresis in the River Waal, Netherlands, by investigating how dune morphology changes through flood hydrographs, using high spatial- and temporal- resolution bathymetric data and robust computational analysis methods to produce probability density functions of dune morphology. This quantification aims to provide a better understanding of dune hysteresis in large rivers. The analysis examines several large data sets of river bathymetry from a 13 km reach of the River Waal, Netherlands, in a time series of bi-weekly multibeam echo sounder surveys over the last 12 years. Parameterization includes dune height, wavelength, leeside angle and leeside shape, to assess dune kinematics and hysteresis during different flood hydrographs.",
author = "Julia Cisneros and Jim Best and {van Dijk}, {Thai{\"e}nne A G P} and Erik Mosselman",
year = "2019",
language = "English",
isbn = "978-2-11-139488-9",
pages = "51--56",
editor = "Alice Lefebvre and Thierry Garlan and Christian Winter",
booktitle = "Proceedings of the International conference Marine and River Dune Dynamics 2019",
publisher = "SHOM",

}

RIS

TY - GEN

T1 - Dune morphology and hysteresis in alluvial channels during long-duration floods revealed using high temporal-resolution MBES bathymetry

AU - Cisneros, Julia

AU - Best, Jim

AU - van Dijk, Thaiënne A G P

AU - Mosselman, Erik

PY - 2019

Y1 - 2019

N2 - In natural rivers, flow discharge may fluctuate across a range of time scales – from diurnal to seasonal - but is often most pronounced during hydrographs that may encompass long-duration floods. Under these varying flows, bedforms can be created and modified by the flow without achieving any ‘equilibrium’ state. A lag between changes in flow and the morphological response of the bedforms, termed bedform hysteresis, is commonly present. Importantly for channel management and navigation, since dunes may grow larger during floods, but often experience a lagged decay in size during lowering water levels, critical water depths may be reached for inland shipping. There is also a consensus that dunes possess a more flattened shape, and lower leeside angle, than previously assumed in large rivers and that such dunes do not exhibit a region of permanent flow separation downstream of the dune. This different leeside shape thus questions traditional ideas of flow interactions with dunes, where flow separation in the steep dune lee side leads to energy loss (form drag) that increases flow resistance and energy expenditure within the flow. This paper quantifies dune hysteresis in the River Waal, Netherlands, by investigating how dune morphology changes through flood hydrographs, using high spatial- and temporal- resolution bathymetric data and robust computational analysis methods to produce probability density functions of dune morphology. This quantification aims to provide a better understanding of dune hysteresis in large rivers. The analysis examines several large data sets of river bathymetry from a 13 km reach of the River Waal, Netherlands, in a time series of bi-weekly multibeam echo sounder surveys over the last 12 years. Parameterization includes dune height, wavelength, leeside angle and leeside shape, to assess dune kinematics and hysteresis during different flood hydrographs.

AB - In natural rivers, flow discharge may fluctuate across a range of time scales – from diurnal to seasonal - but is often most pronounced during hydrographs that may encompass long-duration floods. Under these varying flows, bedforms can be created and modified by the flow without achieving any ‘equilibrium’ state. A lag between changes in flow and the morphological response of the bedforms, termed bedform hysteresis, is commonly present. Importantly for channel management and navigation, since dunes may grow larger during floods, but often experience a lagged decay in size during lowering water levels, critical water depths may be reached for inland shipping. There is also a consensus that dunes possess a more flattened shape, and lower leeside angle, than previously assumed in large rivers and that such dunes do not exhibit a region of permanent flow separation downstream of the dune. This different leeside shape thus questions traditional ideas of flow interactions with dunes, where flow separation in the steep dune lee side leads to energy loss (form drag) that increases flow resistance and energy expenditure within the flow. This paper quantifies dune hysteresis in the River Waal, Netherlands, by investigating how dune morphology changes through flood hydrographs, using high spatial- and temporal- resolution bathymetric data and robust computational analysis methods to produce probability density functions of dune morphology. This quantification aims to provide a better understanding of dune hysteresis in large rivers. The analysis examines several large data sets of river bathymetry from a 13 km reach of the River Waal, Netherlands, in a time series of bi-weekly multibeam echo sounder surveys over the last 12 years. Parameterization includes dune height, wavelength, leeside angle and leeside shape, to assess dune kinematics and hysteresis during different flood hydrographs.

M3 - Conference contribution

SN - 978-2-11-139488-9

SP - 51

EP - 56

BT - Proceedings of the International conference Marine and River Dune Dynamics 2019

A2 - Lefebvre, Alice

A2 - Garlan, Thierry

A2 - Winter, Christian

PB - SHOM

ER -

ID: 53515271