Microbial contamination and management scenarios in a Mediterranean coastal lagoon (Etang de Thau, France): application of a Decision Support System within the Integrated Coastal Zone Management context.
|Author(s)||Loubersac Lionel, Do Chi , Fiandrino Annie, Jouan Mathieu, Derolez Valerie, Lemsanni Abdellah, Rey Valette Hélène, Mathe Syndhia, Pages , Mocenni , Casini , Paoletti , Pranzo , Valette François, Serais Ophelie, Laugier Thierry, Mazouni Nabila, Vincent , Got , Troussellier Marc|
|Source||Transitional Waters Monographs (University of Salento), 2007 , N. 1 , P. 107-127|
|Abstract||1 - In the Thau lagoon (Southern Mediterranean Coast) the main anthropogenic pressure is represented by the
urban development in the watershed, whilst oyster and mussel farming represents one of the main economical
activities in the region.
2 - During the last decade, the increasing organic loads from watershed and urban settlements in the lagoon
surroundings have caused a diffuse contamination by faecal bacteria. Also toxic algal blooms have been
occurring, impairing water quality with major impacts on shellfish farming, fishery and bathing.
3 - In this study, indicators and scenarios identified for the lagoon have been integrated in a Decision Support
System (DSS) to evaluate the best solutions for reducing pressures and improving both water quality and
4 - The watershed has been analysed with reference to indicators of pollution sources and transfer rates to the
lagoon. In parallel, socio-economic indicators and descriptors of urban growth and development have been
assessed. Numerical models have been run in order to simulate the lagoon hydrodynamics in relation to both
meteorological factors and watershed runoff. The impact of faecal bacteria contamination has been evaluated
in terms of economical losses and social conflicts, arising from the restriction of shellfish farming and
marketing during contamination events. Finally, the DSS prototype has been applied to the lagoon in support
to management and future planning.