Analysis of the Effects of Dam Construction on Vegetation of Peripheral Areas in Different Heights and Slopes. Case: Sulayman Shah and Gushan Dam

Two dams were built in 2336 in Ismail Basin of Amir Abad. This agent provides more water for irrigation, whose effect on the vegetation of the basin can be investigated. In this research, using remote sensing data, the changes in vegetation due to dam construction in the Ismail Basin of Amir Abad were studied. For this purpose, ETM and OLI Landsat were used for pre and post damming and 23 vegetation indices were investigated. The score for each indicator was four components, minimum, maximum, mean and standard deviation for dimensions and before the construction of dams. The results of each of the 23 indicators indicated the improvement of vegetation after the construction of the dams. According to the map of vegetation changes presented, more than 979 of the studied basin had a relative growth of vegetation. At the end of the NDVI variation, two images were compared at different heights and slopes to determine the relationship between water use of the dam for slopes and altitudes. The results of this section showed that slopes between 3-59 and elevations ranged from 1,633 to 2,133 m, indicating that after the construction of dams, there was sufficient water for irrigation of these zones.