Spatiotemporal variability in the quality of running waters of the Oued Za (Eastern Morocco) [Variabilité spatio-temporelle de la qualité des eaux courantes de l'Oued Za (Maroc Oriental)]

In order to make monitoring of spatio-temporal variability in the quality of the water in oued za,nine physico-chemical descriptors have been measured repeatedly in time (3campagnes: between early march and late august 2014) in twelve sampling stations chosen along this hydro system. to study the temporal stability of the spatial structure and measure interaction dates-stations,in all three environmental tables obtained was used in partial triadic analysis. results temporal structure study showed that,when that either sampling campaign,the z11 station,located downstream from domestic and industrial of the town of taourirt wastewater discharges,always opposes the other stations,highlighting that this station remains polluted almost throughout the year,as evidenced by the values of the main parameters: o2 dissolved,bod5,ammonium,nitrate,orthophosphate and sulfate. this pollution is reduced at the level of the z12 station with the autoepurateur of water power,before flowing into the moulouya river. © 2016.