| چکیده انگلیسی مقاله |
Identification of the temporal changing in water quality entering in dam’s reservoirs is so important in determination of optimal procedures for management and conservation of water and soil as well as management of reservoirs water quality. In this study, 12 water samples from the flow entering in the reservoir of Givi Dam’s reservoir, located in Khalkhal city in Ardabil province, were prepared monthly in regular intervals. Quality parameters of water samples including pH, electrical conductivity (EC), fecal coliform (FC), nitrate (NO3), phosphate (PO4), total hardness (TH) and turbidity (Tur) were measured. In order to determine the overall quality of the water samples, the Iranian surface water quality index (IRAQIs) was used. The results showed that the quality of water in July, August, September and October was relatively good and in other months it was average and relatively bad. The most important parameters limiting water quality in spring, summer and early autumn are nitrate and turbidity. Therefore, reducing the usage of chemical fertilizers in agricultural lands as well as soil conservation operations in the watershed of Givi Dam will be an important approach in improving the quality of water stored in the dam’s reservoir. |
