The relationship between stream periphyton dynamics and near-bed turbulence in rough open-channel flow

C. Labiod, R. Godillot and B. Caussade

Ecological Modelling, 2007, vol. 209, issue 2, 78-96

Abstract: The main goal of the present work is to characterize, at the laboratory scale, the physical relationships between periphyton biomass and water velocity. Experiments, conducted in a rough open-channel, and numerical simulations, have been performed for a large range of values of the main hydrodynamic parameters. The major role of the shear stress exerted by the flow on the bed, in the periphyton dynamics, is clearly proved. We have developed a model of periphyton biomass dynamics taking the friction velocity, as external physical variable. We fitted the model to our laboratory data and, despite their poorness, the model has shown a good fit, clearly showing that local physical processes are the main factors controlling the dynamics in running waters.

Keywords: Open-channel flow; Roughness; Shear stress; Friction velocity; Biomass dynamics; Periphyton models (search for similar items in EconPapers)
Date: 2007
References: View complete reference list from CitEc
Citations: View citations in EconPapers (3)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0304380007003158
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:ecomod:v:209:y:2007:i:2:p:78-96

DOI: 10.1016/j.ecolmodel.2007.06.011

Access Statistics for this article

Ecological Modelling is currently edited by Brian D. Fath

More articles in Ecological Modelling from Elsevier
Bibliographic data for series maintained by Catherine Liu ().