puits (1) temps (durée) (1) statistiques (1) sédiment (1) fleuve (1) surveillance (1) affectation des sols (1) relief (1) Océan indien (1) évolution (1) érosion (1) document (1) delta (1) couverture (1) Monitoring (1) Maps (1) Aerial photographs (1) Statistics (1) Maps (1) Aerial photographs (1) Remote-sensing images (1) Water (1) Variations (1) Time (1) Statistics (1) Rivers (1) River channels (1) Records (1) Maps (1) Landforms (1)