Conditions d'amélioration de la qualité du milieu Lez-Etangs palavasiens-plage littorale

This paper deals with an application of an hydraulic and pollution transfer simulation model on the looped network system which includes the Lez river downstream Montpellier, the Palavas lagunas, the portion of Rhone canal to Sete and the coastal region, representing a total area of 20 km 2 . This model has been validated with numerous measurements and observations. A thorough diagnosis on the flux transfer and mass analysis of pollutants has permitted in a second phase to test various schemes for improving environmental quality and has led to propose a series of coherent and graded actions dealing with the quality of the various hydraulic connections and otherworks, aimed at fulfulling the objectives set up by surrounding cities, in particular Montpellier district.