Chafai, A., & Taghouti, K. (2026). GIS-BASED ASSESSMENT OF THE PHYSICAL EROSION SUSCEPTIBILITY USING RAINFALL EROSIVITY (R) AND TOPOGRAPHIC FACTOR (LS): CASE OF THE SILIANA RIVER WATERSHED, NORTH-WESTERN TUNISIA. GIS Odyssey Journal, 6(1), 63–77. https://doi.org/10.57599/gisoj.2026.6.1.63