According to the literature review, AHP is particularly useful in complex issues (Yuksel and Dagdeviren, 2007). Obtaining solutions in the AHP is not a statistical procedure, because it can help either a single decision maker or a decision group to solve a MCDM problem (Chen, 2006). Random consistency index is appropriate in generating the reciprocal matrix randomly by using a ninepoint scale. In this research, AHP was applied in four different ways (DRASTIC–AHP, modified DRASTIC–AHP, AHP-DRASTIC, and AHP–AHP) to determine the most suitable method for the study area