Prioritizationsuitable sitesfor undergrounddam's construction using decision-makingmodels inarid andsemi-arid

A large part of the Iran is located in the arid and semi-arid region. Most natural water body and reservoirs in these areas are faced with the problem of evaporation and drought. Underground dams for storage water in the ground, one of the best ways to conserve water in dry areas considered it comes. In this study, we tried using multi-criteria decision-making models to rank suitable sites for construction of underground dams in the Keriyan region in Hormozgan province. For this purpose, at first with field visits, 10 locations were determined suitable for underground dam construction. Then, based on the expert opinions (through questionnaires) and a scientific literature review of 10 criteria, including water quantity, water quality, along the axis of the dam, the dam axis depth, reservoir storage coefficient, volume of reservoir, lithology of the dam axis, slope, water requirement (drinking, agriculture and industry), access (roads, villages and Quarries) prioritization for suitable sites were used. In the following three decision models include TOPSIS, ELECTRE 3 and the Analytical Network process was used. To choose the best ranking and performance models was used nonparametric Spearman correlation coefficient techniques. The results showed that Analytical Network process model with Spearman correlation coefficient 0.91 and 3.33 variance and standard deviation 1.8 was chosen as the best model, And the Bondar underground dam site as well as the best site for the construction of an underground barrier was determined.