Influence of aquatic plants on the flow resistance and the hydraulic capacity of vegetated rivers

L. De Doncker, P. Troch, R. Verhoeven, K. Bal, P. Meire

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations

Abstract

Vegetation growth drastically influences water levels and flow patterns in lowland rivers. Rise of the water level can have consequences for the surrounding areas and varying velocity patterns can influence the morphology of the river. The universities of Ghent and Antwerp are carrying out research in the river Aa, the Grote Kaliebeek and the Desselse Nete (Antwerp, Belgium) in order to better understand the natural phenomena involved and to come to a more accurate determination of the different parameters. Field measurements are carried out to collect data on discharge, stage and amount and variation of aquatic weed growth. The variation of the friction factor (Manning coefficient), influenced by the varying amount of vegetation, is determined as a function of time and distance. Following a seasonal cycle, flow resistance increases with plant growth in spring, reaches a maximum in early summer and then decreases slowly to the minimum in winter. Knowledge of the variation of the biomass in the time will lead to appropriate use of roughness coefficients in modelling surface flow in rivers.

Original languageEnglish (US)
Title of host publicationProceedings of the International Conference on Fluvial Hydraulics - River Flow 2006
Pages593-602
Number of pages10
StatePublished - Dec 1 2006
Externally publishedYes
EventInternational Conference on Fluvial Hydraulics - River Flow 2006 - Lisbon, Portugal
Duration: Sep 6 2006Sep 8 2006

Publication series

NameProceedings of the International Conference on Fluvial Hydraulics - River Flow 2006
Volume1

Other

OtherInternational Conference on Fluvial Hydraulics - River Flow 2006
CountryPortugal
CityLisbon
Period9/6/069/8/06

ASJC Scopus subject areas

  • Water Science and Technology

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  • Cite this

    De Doncker, L., Troch, P., Verhoeven, R., Bal, K., & Meire, P. (2006). Influence of aquatic plants on the flow resistance and the hydraulic capacity of vegetated rivers. In Proceedings of the International Conference on Fluvial Hydraulics - River Flow 2006 (pp. 593-602). (Proceedings of the International Conference on Fluvial Hydraulics - River Flow 2006; Vol. 1).