Numerical study on the effects of floodplain vegetation on river planform style

Auteur(s) et Affiliation(s)

CROSATO, A.

UNESCO-IHE, Dep. of Water Engineering, Delft, Pays-Bas

Univ. of Technology, Fac. of Civil Engineering and Geosciences, Delft, Pays-Bas

SAMIR SALEH, M.

UNESCO-IHE, Dep. of Water Engineering, Delft, Pays-Bas

Description :
The effects of floodplain vegetation on river planform have been investigated for a medium-sized river using a 2D morphodynamic model with submodels for flow resistance and plant colonization. The flow resistance was divided into a resistance exerted by the soil and a resistance exerted by the plants. Bank erosion was related to bed degradation at adjacent wet cells. Bank advance and retreat were reproduced as drying and wetting of the computational cells at the channel margins. The model was applied to a hypothetical case with the same characteristics as the Allier River (Auvergne, France). The river was allowed to develop its own geometry starting from a straight, uniform, channel. Different vegetation densities produced different planforms (braided planforms, incipient meanders).

Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2011, vol. 36, n°. 6, p. 711-720, nombre de pages : 10, Références bibliographiques : 58 ref.

Date :
2011

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley

Langue :
Anglais