Specify any auxiliary models needed to link with the systems model.

Subtask Description:
Specify any auxiliary models needed to link with the systems model.

Action points of the implementation:

List auxiliary models that are available to you, and that are feasible to use with available resources.

Area:
Thau Lagoon, France.

Policy Issue:
Managing the microbiological contamination.

Human Activities:
Urban activities, agriculture, shellfish farming, recreational activities.

General Information:
The natural marine heritage of the area is linked to high productivity and biological diversity which involve water management issues, as the variety of the lagoon economic exploitation often creates antagonism and conflicts. Urban and land-use pressures are high and increasing while agriculture is in decline and the phenomenon of agri-urban areas is spreading, causing increasing microbiological contamination effects that have impact on the shellfish farming activity. The main stakeholder concerns are connected to the management of water resources in relation to the population growth and the viability of the traditional activities (shellfish farming and recreational activities).

Example of Implementation:

Model name	Model type	Model dimension (ecologic/economic/social)	Model inputs	Model outputs	Ownership	Remarks
MARS 3D	Numerical Model	Hydrodynamic	Meteorological data	Water temperature, salinity, water level, current direction and velocity	Ifremer	Two models available with a mesh size of 300 and 100m respectively with 10 vertical layers
Phytoplankton	Numerical Model	Ecology		Primary pelagic production	Ifremer	Coupled with MARS 3D
Macrophyte dynamic	Numerical Model	Ecology		Seagrass growth and production	Ifremer	Coupled with MARS 3D
Dynamic of reared shellfish	Numerical Model	Ecology		Biomass and production of reared shellfish	Ifremer
Dynamic of anoxic crises (oxygen cycle)	Numerical Model	Ecology	Organic content and output of MARS 3D	Concentration of oxygen (water and surface sediment)	Ifremer	Coupled with MARS 3D
Water demand	Numerical Model	Microeconomic model		Supply and Demand, prices and costs	University of Montpellier I/ DITTY project	(with STELLA software)
Local economy, impact and scenario of management plan	Numerical Model	MEPP (Prospective Macroeconomic model)		Supply and Demand, prices and costs	University of Montpellier I/ DITTY project
SWAT Thau (watershed)	Numerical Model	Hydraulic and ecology	Meteorological, watershed land use, map of non point and point sources of pollution	Water and contaminant fluxes to the lagoon	Joint Research Center Ispra / Ifremer
Phosphorus cycle	Numerical Model	Ecology	Meteorological, MARS 3D output	Phosphorus speciation in water, biota and sediments	Ifremer	Coupled with MARS 3D
Fate of faecal contaminants (E.coli)	Numerical Model	Ecology	Physical (MARS 3D), source loads	Concentration in water and shellfishes	Ifremer	Coupled with MARS 3D

Contact:
Remi.Mongruel, Remi.Mongruel@ifremer.fr