De Carvalho Junior W. auteur aut IRD Loireau Maud auteur aut IRD Fargette Mireille auteur aut IRD Calderano Filho B. auteur aut IRD Wélé A. auteur aut IRD text journalArticle eng text/pdf reformatted digital access The purpose of the study is to verify whether some correlation exists between soil erodibility (i.e. K factor mentioned in RUSLE model) and data obtained from satellite images. This piece of work represents a first attempt towards a model that would predict the risk for soil erosion, from information contained in satellite images. Ouarchoch is a rural community in Ferlo Region, Senegal. It lies in a Sahelian typical arid zone and is affected by desertification processes. Ouarchoch site was the pilot area on which the test was performed. K factor was calculated by using soil textural data (sand, silt and clay) in the top (0 – 5 cm) soil layer (data obtained from the web). Landsat7 satellite images represented different seasonal snapshots ("cool" dry season, warm dry season, rainy season, end of rainy season or beginning of dry season) of the same year, 2014. Calculation used Bands 1 to 7 and Normalized Difference Vegetation Index (NDVI). The choice of data, calculation and analysis are detailed. Some positive moderate correlation exists between soil erodibility on the one hand, and NDVI index displayed during the dry season (images in January and May), as well as Band 5 radiations displayed at the beginning of the dry season (post-harvest, image in October) on the other hand. specialized TELEDETECTION SPATIALE IMAGE SATELLITE TEXTURE DU SOL ERODIBILITE DU SOL DESERTIFICATION GESTION DE L'ENVIRONNEMENT CORRELATION SENEGAL 126TELAPP03 068EROSOL 082ECOSYS 41 2 51-66 2017 0304-2685 https://www.documentation.ird.fr/hor/fdi:010072090 0304-2685 [F B010072090] https://www.documentation.ird.fr/hor/fdi:010072090 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers18-01/010072090.pdf IRD - Base Horizon / Pleins textes 2018-01-24 2020-11-27 fdi:010072090 fre