Pirtaqi dam and hydroelectric power plant site selection using multi-criteria evaluation (AHP)

The Pirtaqi dam will be constructed in 50 km eastern of Miyaneh and 45 km south-western of Khalkhal, on Qezel-Oezan River in Ardebil province. For the Pirtaqi site were purposed two dam site, named 15 and 15A. In this paper by using multi-criteria evaluation of AHP (Analytic Hierarchy Process), the preferred dam site for dam construction had presented. For selection of best dam site have been descript 8 criteria and 26 sub criteria,then had evaluated by using Super Decision software. On the base of preferred evaluations for sub criteria that had depended to Q, RMR, and DMR classifications, quantitative values of RQD, SPI and GSI, permeability of banks and bed rock, uniaxial compressive strength, deformation moduluss, stability and conditions of power plant tunnel, major joints and faults in dam axis, excavation volume, depth of weak pyroclastic rocks and alluvium texture, the 15A dam site has higher scores of pair wise comparison matrix and has been presented for preferred dam site.