WATER QUALITY INDEX AND MULTIVARIATE STATISTICAL APPROACH IN ASSESSING THE QUALITY OF IRRIGATION WATER OF THE CAYKOY POND

In this study, 28 parameter data were obtained from 4 stations to determine the water quality of Qaykoy Pond, which was built for irrigation purposes, and indices and statistical methods were used for a simple interpretation of the data. The parameters constituting the main components of water mass were used in calculating the WQI. The results obtained showed that the water quality of pond ranged between high quality and very polluted water according to WHO and SWQR. Examining the water quality from the aspect of irrigation water, SAR, Na %, RSC, and KR did not pass beyond the limit values. MH value was found to be harmful for irrigation. According to the cluster analysis, the summer and autumn seasons and the winter and spring seasons were found to be more similar to each other. PCA was affected by four main factors explaining 86.41% of the total variance and it was determined that the main pollution sources of the pond were climatic factors, anions reaching the water and nonpoint pollutants. According to the annual mean values ofparameters, WQI was found to be almost-good quality water. These spatial and temporal scale results will guide the future freshwater management practices.