Cartographie des habitats naturels des estrans et zones humides littorales

Abstract

In between land and ocean, tidal flats and coastal wetlands functioning and evolution are constrained by climatic and anthropic-driven forces. Monitoring of these coastal areas takes place in the frame of European environmental directives and integrated management plans aiming at addressing their ecological status. Several satellite image-based mapping strategies can be implemented to answer these various needs : (1 ) exhaustive habitat mapping over intertidal areas (Natura 2000 oriented), (2) mapping of seagrass meadows of Zostera no ltii (Water Framework Directive), (3) mapping of salt marsh habitats, (4) monitoring of landscape and vegetation changes driven by accidental or voluntary depolderisation events. This paper addresses developed mapping strategies based on both optical and radar High Resolution (SPOT-5) and Very High resolution (Pléiades, TerraSAR-X) images that were defined for the monitoring and management of coastal areas.