On the modelling of biological effects on morphology in estuaries and seas

Michiel Knaapen, Harriette Holzhauer, Suzanne J.M.H. Hulscher, M.J. Baptist, Mindert de Vries, M. van Ledden

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

47 Downloads (Pure)


Morphological modelling aims to explain and predict the changes in rivers, seas and estuaries due to these interaction. In recent history, a lot of progress has been made, especially with stability analysis approaches. However, so far only the physical interactions have been taken into account. It is known however, that biological factors are important to the dynamics of the water systems. In this paper a first step is made in the inclusion of biology into the morphodynamic models. This inclusion is based on the effect that benthic organisms have on the erodibility of the bed. This can easily be included by a change of the critical bed shear stress. These changes in the critical bed shear stress then influence the morphology. This idea has been applied to two cases. The results of the first case indicate that this approach can reproduce the influence of benthic organisms on the mud content of the bed in estuaries. The second case shows that even low numbers of organisms can influence the characteristics of large bed forms.
Original languageUndefined
Title of host publicationRCEM 2003. Proceedings of the Third IAHR Symposium on River, Coastal and Estuarine Morphodynamics
EditorsA. Sánchez-Arcilla, A. Bateman
Place of PublicationMadrid, Spain
ISBN (Print)90-805649-6-6
Publication statusPublished - 1 Sep 2003
Event3rd IAHR Symposium on River, Coastal and Estuarine Morphodynamics, RCEM 2003 - Barcelona, Spain
Duration: 1 Sep 20035 Sep 2003
Conference number: 3

Publication series



Conference3rd IAHR Symposium on River, Coastal and Estuarine Morphodynamics, RCEM 2003
Abbreviated titleRCEM


  • IR-44998
  • METIS-211018

Cite this