“GIS to Create Maps Based on the Bergsma Model for Gully Erosion Estimation Using DEM: A Case Study for Qarahanjeer, Kirkuk, Iraq”. Iraqi National Journal of Earth Science (INJES), vol. 26, no. 4, Oct. 2026, pp. 31-39, https://doi.org/10.33899/injes.v26i4.56023.