Site Selection of Floodwater Spreading Project Using Analytical Hierarchical Processing (AHP) Model (Case Study: Eshghabad Watershed- TABAS)

Floodwater spreading over the alluvial located in the basins outlets with the aim of storing of floodwaters is a suitable method for exploitation of dried river, seasonal rivers and extra flows of permanent rivers. Determination of appropriate site for water spreading is one of the most important stages of these projects. The purpose of this study is site selection of floodwater spreading project using of analytical hierarchical processing)AHP(in the Eshghabad basin. Data layers: Slope, permeability, geomorphology, lithology formation and density of vegetation were combined in different models and site selection map was prepared. Then, this map was compared with floodwater spreading map that had been executed in the research area. Reduce of devastating floods; increasing percentage of vegetation; increasing biodiversity and discharge of the springs are all of the reasons for successful flood control project in the study area. Therefore, comparing the results of this research with Floodwater spreading map of the study area showed that the factors used in models are suitable for site selection of floodwater spreading and implemented project has been located in the good and suitable area that had been determined by present model. Therefore, AHP model is appropriate method for site selection of floodwater spreading projects in arid and semi- arid regions.