Spatiotemporal evolution of physicochemical parameters of the Moulouya [Évolution spatiotemporelle des paramètres physico-chimiques de la Moulouya]

The physicochemical parameters of surface water from the moulouya know quite significant variability in space and time under the influence of anthropogenic or natural phenomena. this study proposes a bimonthly follow-9 abiotic descriptors 22 stations on the moulouya. it is based on processing data collected during the measurement period from 03 march to 27 august 2014,and focuses on the spatiotemporal variability of these abiotic 9 descriptors. in this context we seek to determine the spatial structure and the temporal structure of environmental variables,and identify the relationship between these two structures. the results obtained allowed to demonstrate strong organic load at the stations m6,m12 and m16,receiving wastewater discharges from rural towns and missour,zaïda respectively,and the urban commune of guercif,as evidenced by the main parameters values: bod5,ammonium,nitrate,orthophosphate and sulfates. however,this pollution is mitigated downstream watercourse as a result of autoépuratoire phenomenon. these results also highlight a dominant spatial typology marked by a reduced seasonal influence.