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Abstract
This research work oriented to use Geographical Information System (GIS) in mapping and selection of dam/reservoir site in Albaha Area (KSA) based on analyzing Digital Elevation Model (DEM).
The Digital Elevation Model of the study area was used as a base of this study. After identifying the most suitable site for locating dam/reservoir, three cases were studied; Higher elevation, Intermediate and Lower elevation.
Results showed that the topography of the study area can be utilized to locate a proposed dam at Almikhwah province. This dam can reserve water between about 426 to 9.8 million cubic meters with a dam height of 78 to 5 m respectively. On the other hand, the proposed dam length may vary from 625 to 247m. Moreover, GIS tools with DEM reflect powerful, easy, quick, and cheap tools for preliminary dam or reservoir site selection.