عنوان مقاله [English]
Water quality river is important from the economic, social and environmental aspects, and its importance is felt in the planning of water resources management and health assessment of watersheds. The present study aimed to investigate the water quality of Qarasoo River in Golestan province by descriptive cross-sectional method using qualitative variables and biological parameters of water in hydrometric stations located on Qarasoo River during the period from 1380 to 1393. An overview of the relationship and sources of physicochemical variables provides. Based on the results of chemical analysis and plotting the Schoeller, Wilcox and Piper diagrams, the water quality of the river is not suitable due to the high concentrations of sulfate, sodium and chlorine ions according to the drug Schoeller diagram, and is agricultural according to the Wilcox In the C3S1 classification, which represents a moderate quality. Also, according to the Piper diagram, which shows the hydrothermal type of water, the qualitative water type is introduced as Calcium-Magnesium-Chloride type. For improving the quality of river water and its efficient, by creating suitable environmental conditions and improving the ecological conditions in the river, point and non-point pollutants entry into the river water especially urban sewage and industrial wastewater and agricultural pollutants should be prevented with long-term plans.