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Assessment of the potential areas for underground dam construction, Case Study: Roomeshgan Area, Southwestern Lorestan Province, Iran
Jafar Rahnamarad, Siamak Baharvand, Salman Soori

Last modified: 2017-08-29

Abstract


One of the novel methods for dealing with the problem of water shortage and the decline of groundwater levels in the arid areas is the construction of underground dams. It is difficult to make decision about suitable locations for the construction of underground dams because of the necessity to consider numerous factors. Some of these criteria are hydrological, geological and geomorphological characteristics of the area. By applying the GIS and AHP methods, this study attempted to introduce the suitable locations for construction of underground dams in Roomeshgan area in Lorestan Province, Iran. For this purpose, factors such as slope, lithology, land use, alluvium thickness, water quality, and distance from the well, fault and drainage network were used. Using Analytic Hierarchical Process (AHP) for the possibility of considering various qualitative and quantitative criteria, the process can be one way to select the appropriate location for constructing underground dam. In this study, after the assessment of the used layers in the Expert Choice software, weight mapping of each layer was prepared. Then, the map of suitable areas for construction of underground dam were prepared by overlapping the weight mappings of each layer in ArcGIS software. According to results, 15.87%, 11.96%, 35.75%, 33.23% and 3.18% of the region are located in very poor, poor, moderate, suitable and very suitable arenas respectively. After several field surveys of the area with 3.18 percent, 5 locations were selected for underground dam construction.


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