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The Mapping and The Evaluation of Gross Alpha and Gross Beta Activity Distribution in The Natural Spring Waters of Eastern Black Sea Region Using Fuzzy Logic Method

In the study, drawing upon the fuzzy logic approach, the general distribution of gross alpha and gross beta concentrations measured from the natural spring waters in the Eastern Black Sea region was identified, and the predicted values were mapped calculating for the unmeasured points. The measurements were obtained from 40 stations in designated 7 cities which are Artvin, Rize, Trabzon, Giresun, Ordu, Gümüşhane and Bayburt. Fuzzy sets and rule bases were generated for the general structure of the study area benefiting from the findings of gross alpha and gross beta activity values measured in all these stations. In this study, East-West X coordinate, South-North Y coordinate and height data were indicated in fuzzy sets with gross alpha and gross beta concentrations, and predictions were done using fuzzy rules. The performance evaluation of fuzzy model was assessed by means of cross validation diagrams. Pearson's r coefficient are found as 0.74 and 0.80 respectively for gross alpha and gross beta from these diagrams. In the conclusion of study, fuzzy logic model predictions were represented and the results were indicated as radiological distribution maps. This study demonstrates that the radiological distribution is able to be detected using fuzzy logic approach, and that the predicted values for unmeasured points are able to be calculated in a specific confidence interval.