Riffle-pool morphometry and stage-dependant morphodynamics of a large floodplain river (Vereinigte Mulde, Sachsen-Anhalt, Germany)

Auteur(s) et Affiliation(s)



Description :
In this study a monitoring approach is employed that focuses on analysing cross-sectional and longitudinal channel geometry of a large floodplain river (Vereinigte Mulde, Sachsen-Anhalt) with a high temporal and spatial resolution, in order to conclude from stage-dependant morphometric changes to riffle and pool maintaining processes. An index for the longitudinal amplitude of riffle-pool sequences, the bed undulation intensity or bedform amplitude, is introduced and proved to be highly significant as a form parameter, its first derivative as a process parameter. The process of pool scour and riffle fill is addressed as bedform maintenance or bedform accentuation. It is indicated by increasing longitudinal bed amplitudes. According to the observed dynamics of bed amplitudes, maintenance of riffle-pool sequence lags behind discharge peaks.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2011, vol. 36, n°. 12, p. 1647-1657, nombre de pages : 11, Références bibliographiques : 33 ref.

Date :
2011

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