Site selection for underground dam using the water balance simulation (SWAT model) and analytical network process (ANP) (case study: Jamyshan watershed)

A large part of Iran is considered a semi-arid regions and water is a limiting factor for human activities in these areas. One of the ways to eliminate seasonal shortages of water is using groundwater. Underground dams can be used for storing and using underground water, which can be used to improve the management of existing water resources and increase the productivity of these resources.1 . In this research, at first,by using the knock-out criteria, by means of Boolean logic, including geology, land use, slope and fault and using Bollini logic, suitable areas were identified for the construction of underground dams.2. - In the second stage,by using ANP analysis network methods and by using experts' questioning method, other important criteria were chosen to select the most appropriate areas for underground dams including distance from the road, distance from the village and .... In underground dams, subsurface flow has many importance. Therefore, in this research, the SWAT model was used to simulate water flow and subsurface flow in the area and For prioritizing the obtained areas, those areas with proper subsurface flow was identified. after evaluating of the weights of each parameter in the super decision software environment, it used to locate and prioritize the susceptible areas. Eventually, nine favorable points were identified as optimum areas for the construction of a landmine.