Potentialités des images Landsat pour l'identification et la délimitation de zones humides à l'échelle régionale : l'exemple de l'Est de la France

Abstract

Wetlands require an inventory on the entire national territory as they represent a social issue. A regional approach based on medium spatial resolution satellite images Landsat is a good scale investigation. However, it is necessary to have a proper methodological approach to ensure a consistent result on the whole territory as well as to overcome the identification difficulties related to the protean nature of the geographical object wetland. To do this we propose to maximize the potential of identifying wetlands selecting representative images of a hydro-climatological situation which is particularly favorable to the realization land submergence, witnessing the presence of a wetland. In this regard the more favorable hydro-climatological period is detected by the statistical method of CUSUM. Next, a hybrid method using selected images and exogenous data is developed. It leads to highlight three wetlands levels.

Keywords

• France
• Landsat
• wetlands
• hybrid method
• hydro-climatology