Contribution of the pollution index and GIS in the assessment of the physico-chemical quality of the surface waters of Moulouya River (NE, Morocco)Abdellah El Hmaidi, Abdelghani Talhaoui, Imad Manssouri, Hajar Jaddi and Habiba OusmanaLHB, 3 (2020) 45-54DOI: https://doi.org/10.1051/lhb/2020028