Résumé
Background and Aims: the growth of population and pollutions of discharge types of urban, industrial and agricultural wastewaters, leachate of disposal waste, spread the pollution in water resources and limited this resources. Survey of pollution and Evaluation of water quality in rivers with OWQI and GIS are effective tools for management of impact of environmental water resource
Materials and Methods:this survey is cross-sectional and quality parameters determined. this parameters is: Temperature, Fecal Coliform[F.C], Biochemical Oxygen Demand[BOD5], Nitrates[NO3], Total Phosphate[PO4], pH, Dissolved Oxygen[DO],Turbidity, total solid[TS]. Sampling for watershed was carried out over 12 month from 6 station Also this data analyzed with OWQI index, then river basis on quality of water was zoning by GIS
Results: The average of OWQI between 6 station, the highest average was 33.04, which corresponds to "very bad" quality water at the sampling point 1[best station] and decreased to around 14.55 [very bad quality] at the sampling point 6. The association between sampling month and water quality index was statistically significant [p<0.05]. for drinking uses, sampling point 1 were suitable than other sampling points. This station,s water with pH adjustment and primarily treatment can sues for drinking
Conclusion: With physical, chemical and biological agent monitoring and also with control of water quality indexes this points, we observed impact of environmental pollution in the length of river. This situation of river shown, river changed to wastewater channel and quality and quantity of water in this river were changed