Document Type : Research Paper
Authors
1
Department of Water Science and Engineering, Faculty of Technology and Engineering, Islamic University, Sanandaj, Iran.
2
. Department of Water Engineering and Management, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran.
10.22059/jwim.2024.364568.1100
Abstract
Due to the increasing pollution from domestic wastewater in urban and rural areas, as well as industrial and agricultural activities, the future of the country's water resources, especially surface water resources, will face inevitable environmental crises. The assessment of the water resources situation to determine the severity of the current crisis and warn about the future is very important and influential. In this research, the quality status and self-purification capacity of the Sirvan River in the Azad Doab interval under the influence of input pollutants along the study area have been investigated. For this research, considering the current conditions and situation, 7 physicochemical water quality parameters, including dissolved oxygen, ammonia, nitrate, phosphate, turbidity, pH, and temperature, were measured and analyzed at 10 selected stations along the approximately 45-kilometer study area in three seasons (winter, spring, and summer) using standard methods. Furthermore, the water quality status of the free water interval was evaluated using the IRWQI water quality index. According to the results obtained, most of the sampling stations had low pollution levels due to adequate water supply, winding path, and appropriate ventilation by wind, and they were qualitatively relatively good. Only in some areas, such as the location of station number 9, the water quality has decreased due to the discharge of wastewater from the city of Sarvabad into the river, but after that point and along the route, it gradually improves towards the desired condition.
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