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Water quality cartography of the upstream part of the Oum Er Rabia hydraulic basin (Morocco)

Water resources constitute the basis of human existence; however, they are becoming increasingly scarce under conditions of population increase, economic development, climate change and especially the impact of pollution due to human activities such as the discharge of wastewater without treatment in rivers, lakes … Also, in Morocco, water resources are becoming scarce as in the global what makes this country among the areas under water stress. The main objective of this study is the evaluation of the water quality of the upper part of Oum Er Rabia. The results of bacteriological analyzes from the various stations showed an increase in total coliforms and feacal coliforms downstream of the Khenifra wastewater treatment plant and at the upstream station of the El Hansali dam. Regarding the physicochemical quality, the water of the majority of the controlled stations is of average to poor quality except one station which has a very poor quality according to the Moroccan standard relating to surface water.