GIS applications for construction of dams and hydraulic structures; geospatial view

In this paper, by using the information items provided by the location and specifications of the selected dams and structures in Iran and in the world, in terms of distance from the targets used in the downstream and, if necessary, the related positions in the upper hand, as well The view of the altitude of the sea relative to the sea level and its complications will be pursued through written sources (books, sites, articles, etc.) and visual resources (maps and satellite imagery) and its application on the selected map of the unit. This information is connected to the location of the dams with the location of the software, and according to the intended purposes in the results, the program is defined and Reviews and comparisons. The results of the research showed that by choosing a dam site at very high elevations (for example, more than 1500 meters), the catchment areas are more limited and due to the high slopes around the reservoir and the decrease of the lake's surface, It will extremely decreases the dam volume. Therefore, this option is economically optimal in the absence of water-rich rivers or low rainfall.