نوع مقاله : ویژه نامه تخصصی آب زیرزمینی
1 گروه علوم زمین دانشکده علوم طبیعی دانشگاه تبریز
2 گروه علوم زمین، دانشکده علوم طبیعی، دانشگاه تبریز، تبریز، ایران
3 گروه مهندسی آب، دانشکده کشاودری، دانشگاه تبریز
عنوان مقاله [English]
The drinking water of Bostanabad region is mostly supplied from the groundwater resources of Bostanabad Plain. The aim of this study is to select the most reasonable and suitable method for investigating the quality of this resources. For this purpose, the rate and weight of the water quality index were calculated using multi-criteria decision making methods. The quality of groundwater resources was investigated by combining entropy and AHP weighting methods with TOPSIS and WQI rating methods. Parameters of pH, TDS, Na, SO4, Cl, NO3 and F were used in the combined methods of Entropy-WQI, AHP-WQI, Entropy-TOPSIS and AHP-TOPSIS. The coefficient of determination (R2) between the average rank of the samples and the ranks obtained from each of the methods showed that the AHP-TOPSIS method has a high ability to water ranking and classification. The samples were located in the Entropy-WQI method in 2 classes of good and average, AHP-WQI method in 3 classes of very good, good, and average, Entropy-TOPSIS method in 5 classes of very good, good, average, poor, and very poor and AHP-TOPSIS method in 4 classes very good, good, medium and poor. By comparing the combined methods, it became clear that AHP was better than entropy in terms of weighting and TOPSIS was better than the classical WQI method in terms of rating. The results showed that the entropy method is caught in an error regarding the values that are similar and close to the minimum value of the parameters that have a direct relationship with entropy.