In arid and semi-arid areas،low rainfallt ،the irregular occurrence of rainfall and high evaporation are the most important restricting factors for using surface water resourcrs there for، the availability of water during the year dependz on management plans in this area. On way of management of the underground flow is by using of underground dams. Underground dam are structures. Which blocked lose subsurface flow and storid in the basement to be.site selection is difficult because of containing many factors such as guality and guantity. Using the traditional method is very expensive and takes time. There fore، making a decision support system based on geographic in formation system is very necessary.in this study، Vikor and Topsis models used to locate the underground dam in jam city of Bushehr province this study was conducted in there stages. In the first stage، by eliminating the criteria، the in appropriate areas were identified and suitable areas were identified. In the second step، the selection of suitable axes that was using field studied observation. In finally، 6 axes were identified in the eliminating section using the bas maps، the existing information and the integration of eachother. After field study and other available data، 3 axes were selected from the first locations that were the most suitable axes in the range.In the third step، for the eva‎luation and prioritization of these 3 axes، the weights extracted used from the hierarchical analysis model (AHP) were ranked in Vikor and Topsis models. Also، the combined Copeland model was used for the results of the two models، and finally، the results obtained from the models showed similar results.

سعيد سلطاني كوپايي، رضا مدرس

جواد ابراهيمي

سعيد اسلاميان، سعيد پورمنافي