Water Quality Monitoring and Lake Ecosystem Modelling: an Integrated Approach to Assess Cyanobacterial Blooms

Marie-Laure de Boutray (1, 2) , Bruno J. Lemaire (1) , Brigitte Vinçon-Leite (1) , Bruno Tassin (1) , Yves Comeau (2) , Sarah Dorner (2)

1 LEESU - Laboratoire Eau, Environnement et Systèmes Urbains
2 Department of Civil, Geological and Mining Engineering

In the last decades, the incidence of harmful algal blooms in surface waters has increased in frequency, severity and duration. Short and long term management approaches can address the problem of cyanobacteria blooms. A real-time, autonomous, monitoring program, coupled with a one dimensional deterministic model, was initiated for Missisquoi Bay, Canada in the summer of 2007. Preliminary results from vertical profiles in a pelagic zone show a homogenous distribution of temperature, pH, chorophylle a concentration and cyanobacteria density. Phycocyanin measurements by an in vivo fluorescence probe show high cyanobacteria concentration varying between 1X104 to 1X105 cell/mL.

Mots clés: Cyanobacteria; lake; water; treatment; modeling

Domaines: Environnement et Société

Marie-Laure de Boutray, Bruno J. Lemaire, Brigitte Vinçon-Leite, Bruno Tassin, Yves Comeau, et al.. Water Quality Monitoring and Lake Ecosystem Modelling: an Integrated Approach to Assess Cyanobacterial Blooms. 11th edition of the World Wide Workshop for Young Environmental Scientists (WWW-YES-2011) - Urban Waters: resource or risks?, Jun 2011, Arcueil, France. ⟨hal-00607945⟩