Improved groundwater vulnerability mapping in the Taza aquifer (Northen Morocco) using a modified drastic and GIS- BASED ApproachHanae Bouiss, Imane Amar, Mohamed Makkaoui, Sofia Ourarhi, Said Bengamra and Abdeallah AzougayE3S Web Conf., 632 (2025) 01010DOI: https://doi.org/10.1051/e3sconf/202563201010