An experimental study into the geometry of supply-limited dunes

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Abstract

The relationship between dune geometry and the volume of mobile sediment was studied in flume experiments. In these flume experiments, the volume of mobile sediment on top of an immobile coarse sediment layer was increased stepwise and the bedform characteristics were observed. A strong relationship was found between the volume that is mobile – and therefore available for bedform formation – and the dune dimensions and regularity. If the sediment supply is limited, dunes are smaller and more regular. Series of experiments with a decreasing supply limitation were conducted for different flow velocities and water depths. The relationship between the dune dimensions and the available volume is different for each series. The observed relationships between dune dimensions and layer thickness collapse to one relationship for height and one for length if scaling parameters are introduced. Current models for bedform dimensions under alluvial conditions can be extended to partial transport conditions using this relationship.
Original languageUndefined
Pages (from-to)1713-1727
JournalSedimentology
Volume56
Issue number6
DOIs
Publication statusPublished - 2009

Keywords

  • Bedforms
  • IR-71155
  • fluvial dunes
  • supply limited dunes
  • supply limitation
  • sand-gravel sediment
  • METIS-249776
  • Bedform dimensions

Cite this

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title = "An experimental study into the geometry of supply-limited dunes",
abstract = "The relationship between dune geometry and the volume of mobile sediment was studied in flume experiments. In these flume experiments, the volume of mobile sediment on top of an immobile coarse sediment layer was increased stepwise and the bedform characteristics were observed. A strong relationship was found between the volume that is mobile – and therefore available for bedform formation – and the dune dimensions and regularity. If the sediment supply is limited, dunes are smaller and more regular. Series of experiments with a decreasing supply limitation were conducted for different flow velocities and water depths. The relationship between the dune dimensions and the available volume is different for each series. The observed relationships between dune dimensions and layer thickness collapse to one relationship for height and one for length if scaling parameters are introduced. Current models for bedform dimensions under alluvial conditions can be extended to partial transport conditions using this relationship.",
keywords = "Bedforms, IR-71155, fluvial dunes, supply limited dunes, supply limitation, sand-gravel sediment, METIS-249776, Bedform dimensions",
author = "Arjan Tuijnder and Ribberink, {Jan S.} and Hulscher, {Suzanne J.M.H.}",
year = "2009",
doi = "10.1111/j.1365-3091.2009.01054.x",
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volume = "56",
pages = "1713--1727",
journal = "Sedimentology",
issn = "0037-0746",
publisher = "Wiley-Blackwell",
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}

An experimental study into the geometry of supply-limited dunes. / Tuijnder, Arjan; Ribberink, Jan S.; Hulscher, Suzanne J.M.H.

In: Sedimentology, Vol. 56, No. 6, 2009, p. 1713-1727.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - An experimental study into the geometry of supply-limited dunes

AU - Tuijnder, Arjan

AU - Ribberink, Jan S.

AU - Hulscher, Suzanne J.M.H.

PY - 2009

Y1 - 2009

N2 - The relationship between dune geometry and the volume of mobile sediment was studied in flume experiments. In these flume experiments, the volume of mobile sediment on top of an immobile coarse sediment layer was increased stepwise and the bedform characteristics were observed. A strong relationship was found between the volume that is mobile – and therefore available for bedform formation – and the dune dimensions and regularity. If the sediment supply is limited, dunes are smaller and more regular. Series of experiments with a decreasing supply limitation were conducted for different flow velocities and water depths. The relationship between the dune dimensions and the available volume is different for each series. The observed relationships between dune dimensions and layer thickness collapse to one relationship for height and one for length if scaling parameters are introduced. Current models for bedform dimensions under alluvial conditions can be extended to partial transport conditions using this relationship.

AB - The relationship between dune geometry and the volume of mobile sediment was studied in flume experiments. In these flume experiments, the volume of mobile sediment on top of an immobile coarse sediment layer was increased stepwise and the bedform characteristics were observed. A strong relationship was found between the volume that is mobile – and therefore available for bedform formation – and the dune dimensions and regularity. If the sediment supply is limited, dunes are smaller and more regular. Series of experiments with a decreasing supply limitation were conducted for different flow velocities and water depths. The relationship between the dune dimensions and the available volume is different for each series. The observed relationships between dune dimensions and layer thickness collapse to one relationship for height and one for length if scaling parameters are introduced. Current models for bedform dimensions under alluvial conditions can be extended to partial transport conditions using this relationship.

KW - Bedforms

KW - IR-71155

KW - fluvial dunes

KW - supply limited dunes

KW - supply limitation

KW - sand-gravel sediment

KW - METIS-249776

KW - Bedform dimensions

U2 - 10.1111/j.1365-3091.2009.01054.x

DO - 10.1111/j.1365-3091.2009.01054.x

M3 - Article

VL - 56

SP - 1713

EP - 1727

JO - Sedimentology

JF - Sedimentology

SN - 0037-0746

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ER -