Evaluating the ecological potential for space development of Tarom’s basin, Zanjan province using the hierarchy process analysis (AHP)

In order to perform the foretold action, the hierarchy process analysis (AHP) and the geographical information system (GIS) was used. In the manner that after conducting the intended information layers and application of these information layers in the Arc GIS environment and after the conduction and completion of the questionnaire by the subject-related professionals, prototype and normal matrix has been completed for designating the relative weight of the layers. In the hierarchy process analysis (AHP), according to the relative weight of the layers which were designated after the completion of the questionnaire by the subject-related professionals and conduction of prototype and normal matrix and the conclusions in result, the highest controlling variable is the gradient which the highest percentage of relative weight is allocated to this matter; therefore the region’s central parts which has the least gradient meaning acquiring 0-2 up to 8-12 percent and in the manner of vegetation includes low density fields and thinly scattered forests, etc. are the most appropriate parts for development. Finally the determination of final weight of layers and combining the information was performed in the Idrisi software that the results of this method are as follows: about 14.36 percent of the total area acquires grade one appropriate potential, and about 10.12 percent acquires the grade two potential appropriate for urban- rural development and 75.52 percent also acquires the lack of desired potential for such developments.