جستجوی مقالات مرتبط با کلیدواژه "hei index" در نشریات گروه "جغرافیا"

Water pollution has always been one of the environmental issues around the globe. Among the surface and underground waters, running water and rivers are constantly exposed to more pollution due to the crossing of different areas. The purpose of this study was to evaluate the water quality of Kor River in south of Iran and determine the source of contamination by different factories located nearby. Maternal sample in 2016 on 14 physical and chemical parameters, December 3, April and September). 29 stations completed. Principal Component Analysis (PCA) determined the most important parameters affecting water pollution, and WQI and HEI indices determined the contamination status of each site according to the permissible limits in the river water, and finally, using Karjing method. The spatial distribution of elements in adjacent factories was investigated. The results of the measurements using Principal Component Analysis (PCA) showed that PCA introduces 13 components. The average of the lowest WQI index at station 17 was 0.9 ± 5.0 with non-food quality and highest value at station 6 with mean 87.3 ± 2.0 with good drinking status. Results from HEI showed that stations 16 and 17 had the highest values of HEI index indicating the most polluted stations. The results of the HEI showed that the values of As, Cd were much higher than the permissible limit in drinking water. Finally, the results of heavy metal zoning maps using Kriging method showed that the highest concentration accumulation was related to the central and southern parts adjacent to the factories in the study area.