FormoSat-2/VENμS Users meeting CESBIO, January 12th 2010 Examples of Spot 5 and Formosat data use : Arcachon data set Virginie Lafon, Jean-Marie Froidefond.

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Presentation transcript:

FormoSat-2/VENμS Users meeting CESBIO, January 12th 2010 Examples of Spot 5 and Formosat data use : Arcachon data set Virginie Lafon, Jean-Marie Froidefond

FormoSat-2/VENμS Users meeting CESBIO, January 12th 2010 Intertidal seagrass meadows monitoring  Interannual variation  Monthly variation  Ecological cycle (annual basis)‏  Impact of meadows extent on sediment resupension processes and feedback on meadows spatial extent (PhD EPOC)‏  VEN  S : 2-day revisit better adapted to low tide imagery The Water Framework Directive (WFD)‏ :  Implementation of operational monitoring tools to quantify the abundance and spatial extent of aquatic vegetation, identify and explain observed changes Lafon et al., 1997; Marieu et al., 2004; De Montaudouin, 2007 ; Lafon et al., 2008, 2009

FormoSat-2/VENμS Users meeting CESBIO, January 12th 2010 Lagoon water turbidity monitoring Shallow water turbidity over intertidal areas Lafon et al., 1997; Marieu et al., 2004; De Montaudouin, 2007 ; Lafon et al., 2008, 2009

FormoSat-2/VENμS Users meeting CESBIO, January 12th 2010 Lagoon water turbidity monitoring Fetch-limited wind waves and sand / mud resuspension modelling

FormoSat-2/VENμS Users meeting CESBIO, January 12th 2010 Shallow water morphology survey  Annual 3D mapping Navigation channel monitoring Coastline erosion survey  Medium- to long-term processes

FormoSat-2/VENμS Users meeting CESBIO, January 12th 2010 Shallow water morphology survey  VEN  S : 2-day revisit better adapted to illustrate storm impact, study and understand short event hydro-sedimentary processes + forecast: effect on human activities / security 2009/10/ /12/22

FormoSat-2/VENμS Users meeting CESBIO, January 12th 2010 Shallow water morphology survey  VEN  S : more bands (blue -green) better adapted to shallow water morphology retrieval based on optic models (Dehouck et al., ICS 2009)‏

FormoSat-2/VENμS Users meeting CESBIO, January 12th 2010 Nearshore vortex structure observation & modelling Rip currents  The wave breaking generates seawards current that transport SPM offshore  Rip currents are characterised on SP-05 / F2 imagery  VEN  S : 2-day revisit better adapted to estimate sediment resuspension + acrosshore supended loads due to rip currents (we need a quantification algorithm) + shallow water sand transport processes + modelling

FormoSat-2/VENμS Users meeting CESBIO, January 12th 2010 Nearshore vortex structure observation & modelling Inlet Water mixture processes Impact on harmfull algae blooming and / or their propagation inside the Bay??