Extracting the geometric and morphometric measurements of the Great Abra Valley Basin

Morphometric measurements are considered a database of quantitative data necessary for any study, especially hydrological, because they provide important measurements of land occupations. Geometric and morphometric analysis also provides a lot of quantitative data related to the various elements of the water network. The current study aimed to build an information base for the morphometric characteristics of the Great Wadi Al-Abra Basin in northwestern Iraq, with an area of (782.33) km2, and it forms, along with a group of other sub-basins of the main Tharthar Basin. By employing technology through analyzing the digital elevation model (DEM) and using geographic information systems represented by the program (Arc Gis 10.8), it was possible to come up with a large number of measurements that are considered geometric, morphometric and formal characteristics, through which the hydrological effects of the basin were predicted, the most important of which are the shape factor (0.20), the roundness factor (0.22), the elongation factor (0.50), the integration factor (2.22), the rugosity ratio (10.18), the basin texture (2.15), the number of basin ranks (472), the lengths of the channels (1072.76), and the branching ratio (3.5(.