Evaluation of Quaternary Deposits to Determine Suitable Areas for Water Spreading in Shabestar Plain

Water spreading on the permeable areas is an appropriate strategy for flood control and efficiency. Determination of appropriate site for water spreading is one of the most important stages of such projects. In this paper, suitable areas for water spreading in Shabestar plain were determined based on four parameters including slope, permeability, transmissivity and unsaturated alluvium thickness. For this purpose, by using data of drilling logs from exploration and piezometric wells in the area, layer parameters information was prepared in geographical information system (Arc GIS 10 software) and then maps were combined together. The results showed that the maximum area of the aquifer with 192.794 square kilometers (40.1 percent), had suitable condition for water spreading and 146.512 square kilometers (30.5 %) of ​​the aquifer, had moderate condition. As well as 79.786 square kilometers (16.6 percent), had unsuitable condition for water spreading and 61.046 square kilometers (12.7%) of the aquifer had quite suitable condition.