Pollution indices are considered as useful tools and guidelines for comprehensive assessment of pollution in the region;therefore, these indicators are very important in eva‎luating and monitoring the quality of soil, sediment, climate and ensuring sustainability in the future, especially in the ecosystem of agricultural and industrial farms. In other words, we can point to the important role of pollution indicators in assessing and assessing the level of heavy metal pollution; Pollution indices are divided into two groups: unit indices and composite indices. the pollution index is divided into two categories and index indices which are used in this study, the modified degree of contamination (mCd), and by applying statistical methods such as factor analysis and cluster analysis, the origin of this pollution and its correlation can be found The Single Pollution Index used are Geoaccumulation Index (Igeo) contamination factor (CF) and by applying statistical methods such as factor analysis and cluster analysis, the source of this contamination and its correlation can be found. Composite pollution indicators are a more useful tool for pollution management due to the eva‎luation of several parameters and comprehensive pollution assessment. the results of research in the importance of investigation of heavy metals pollution in different fields can be found that pollution index eva‎luation plays an important role in the eva‎luation and prediction of heavy metal pollution. Heavy metal pollution is currently receiving a lot of attention due to its environmental effects. These metals are significant in terms of soil accumulation, toxicity and bioavailability, on the other hand, heavy metals can be found in high concentrations, especially in mineral minerals. In this study, in order to investigate the concentration of heavy metals in 258 samples of water sediments in Taft basin, the samples were analyzed by ICP-OES method. The collected samples were analyzed for 12 elements Zn, Pb, Ag, Bi, Cu, As, Sb, Ba, W, B, Ba, Mo. According to the pollution assessment, single and composite indices for 4 elements of lead, zinc, arsenic and copper show the values of pollution obtained in this study are much higher than the maximum tolerable, the global average reported and the average of the World Health Organization. Then, the origin and spatial distribution of metals were determined using statistical methods using the erosion potential method, the amount of sedimentation with a value of 97/633 m3 was calculated and areas with low to very severe pollution intensity were identified. Finally, AHP and AHPFuzzy methods have been used to eva‎luate the combination of different layers of pollution information, soil erosion intensity, fault and geology to identify areas prone to pollution. Initially, the target layers were weighted according to the purpose of the study, and finally, using ArcGIS software, the pollution prioritization map was separated into three categories: no-contaminated, contaminated, possible contamination, and definitive contamination. The results showed that in the basins around mineralization and mineral events with high erosion intensity and with high crack faults and metal enrichment are high risk areas for the environment.

حسن طباطبائي، هوشنگ اسدي هاروني

علي اكبر نظري ساماني

احمدرضا مختاري، محسن سليماني