Abhatoo - Centre Nationale de Documentation

In this study, we address the issue the vulnerability of groundwater to pollution at the aquifer of Oulad Ogbane (Northwest of Morocco). The study has been carried out following the TCR method (Method based on 3 parameters: The transit time (T); The degree of purification (C’p/Cp) and The recharge degree (R’/R) ; the weighting coefficients have been determined by sensibility tests, followed by multiple linear regression analysis performed on sample sources showing significant variations in the applied parameters. The studied aquifer is a vital natural source used for domestic agricultural purposes. The area around it is used primarily for farming, which is characterized by a significant use of chemical fertilizers, which represents, in addition to the discharge effluents, a permanent danger to the quality of groundwater. We have carried out a comparison of results against the results of similar studies done on other neighboring aquifers, which showed an urgent necessity to adapt the weighting coefficients, which change from one area to another, to the particularities of the studied area. Applying the TCR method has allowed for distinguishing high sensibility areas that require special attention in terms of preservation and management.