The VEGETATION instrument on board SPOT satellites allows the detection of surface water, thanks to its short wave infrared channel, at the resolution of 1 pixel (1 km). The surface water is detected every 10 days for Africa and broadcasted to African users by means of the Eumetcast broadcasting system operated by Eumetsat. The effective detection of water coupled with the dissemination system provides the capacity for operational monitoring of surface water from continental to regional scales. The continuity of surface observation allows the seasonal assessment of water availability.
La vaste plaine limoneuse et sableuse du Chari est formée de sédiments holocènes récents déposés par le Chari et son affluent le Logone, en relation avec les fluctuations des niveaux du lac Tchad. Des précisions sur la chronologie de l'Holocène supéneur et sur l'extension de la zone d'inondation sont apportées par cette étude.
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