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Modelling periphyton in irrigation canals |
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| Authors: | O Fovet G Belaud S Charpentier A Dauta |
| Institution: | a UMR GEAU, Cemagref, 361 rue JF. Breton, BP5095, 34196 Montpellier cedex 5, France b UMR GEAU, Montpellier SupAgro/Institut de Recherche pour le Développement, 361 rue JF. Breton, BP5095, 34196 Montpellier cedex 5, France c Société du Canal de Provence et d’´aménagement de la région provençale /UMR IMEP, Le Tholonet, CS 70064, 13182 Aix-En-Provence, Cedex 5, France d UMR IMEP, Facultés des Sciences St Jérôme, Boite 441, 13397 Marseille cedex 20, France e UMR Ecolab, Centre National de Recherche Scientifique, 29 Rue Jeanne Marvig, BP 24349, 31055 Toulouse cedex 4, France f Association Syndicale Autorisée du Canal de Gignac, 1 parc du Camalcé, 34 150 Gignac, France |
| Abstract: | Periphyton developments in water distribution canals induce major disturbances for system management, such as clogging problems when fixed algae are detached. Periphyton models can be used to simulate and improve canal management. The purpose of this paper is to review the periphyton models which integrate a hydrodynamic effect, and to discuss their relevance for application in open-channels. Afterwards, a new model of periphyton detachment that integrates the hydrodynamic factor is proposed. An experiment in semi-real conditions is performed to compare periphyton development under four different hydrodynamic regimes. The proposed model is compared on experimental results with two existing models. The new model reproduces well the periphyton dynamics in the four canals simultaneously. |
| Keywords: | Periphyton Irrigation canals Model Shear stress Hydrodynamic Experimental setup |
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