Modelling morphodynamic evolution of river dunes

Andries Paarlberg, Catarine M. Dohmen-Janssen, Suzanne J.M.H. Hulscher, J. van den Berg, A.P.P. Termes

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

4 Citations (Scopus)

Abstract

River dunes influence the hydraulic roughness and water levels in rivers. Especially during floods the interplay between dunes and the flow field could become significant. Therefore, it is desired to forecast the dimensions of dunes during such extreme and unsteady flood events. At present it is not yet feasible to predict the dimensions of dunes by computing the flow and sediment transport in full detail for operational spatial and temporal scales. In this paper, we present a morphodynamic model that simulates dune development, without computing all details in the flow field. The flow model is based on the 2D-vertical hydrostatic equations, with a constant eddy viscosity over depth. Flow separation and the sediment transport behaviour in the flow separation zone are included in a parameterized way. Results of the morphodynamic model using steady flow conditions, are in general agreement with flume experiments. A next step in the research will be to use forecasted dune dimensions for hydraulic roughness predictions.
Original languageUndefined
Title of host publicationProceedings of River Flow 2006, 6-8 September 2006, Lisbon, Portugal
EditorsRui M.L. Ferreira
Place of PublicationLondon, UK
PublisherTaylor & Francis
Pages969-978
ISBN (Print)0-415-40815-6
Publication statusPublished - 6 Sep 2006
EventRiver Flow 2006: 3rd International Conference on Fluvial Hydraulics - Lisbon, Portugal
Duration: 6 Sep 20068 Sep 2006
Conference number: 3

Publication series

Name
PublisherTaylor & Francis

Conference

ConferenceRiver Flow 2006
CountryPortugal
CityLisbon
Period6/09/068/09/06

Keywords

  • METIS-232134
  • IR-60018

Cite this

Paarlberg, A., Dohmen-Janssen, C. M., Hulscher, S. J. M. H., van den Berg, J., & Termes, A. P. P. (2006). Modelling morphodynamic evolution of river dunes. In R. M. L. Ferreira (Ed.), Proceedings of River Flow 2006, 6-8 September 2006, Lisbon, Portugal (pp. 969-978). London, UK: Taylor & Francis.