Mapping the geographic distribution of suitable sites for waste landfill in Nazloochaei Urmia Rangeland

Increased population growth and consequent increasing rural and urban solid waste increases the importance of solid waste management. Site selection have an important influence on the waste management.Therefore ,in this study to prioritize suitable sites landfill Urmia Basin Nazloochaei Rangeland, decision-making support systems including TOPSIS and AHP method was used. Stages of this research consisted of the following processes including: determining effective criteria , provide maps of criteria , provide decision making matrix , weighting of criteria , calculating the rate of incompatibility, calculate the ideal solution both positive and negative ideal solution , calculated relative proximity to positive ideal solution, ranking of sub watersheds and ultimately Mapping the geographic distribution of suitable sites for municipal solid waste landfill in Nazloochaei Urmia Basin. This research was used by ARC GIS software, TOPSIS & EXPERT CHOISE. The results showed that the first appropriate priority and the second priority were B11 and ABCDE-INT1. The AFGH-INT, C1, B1-INT third to fifth respectively in the appropriate priorities were. J3, J111 and J11-INT with the priorities forty -first and forty -third, were the least fit to landfill. B11 have maximum depth of soil and groundwater and least amount of rainfall, the number of wells, surface water density, slope and height than the other sub watersheds. B11 soil texture is average and its current use is inutile. While J11-INT has the opposite conditions.