Iraqi National Journal of Earth Science

Abstract

: The research dealt with the study of the slope systems of the Ashaali drainage basin in the southern Iraqi desert, using the geoinformatics technique, digital elevation models (DEM), satellite images of the Landsat ETM+8, topographic, geological, and hydrological maps. The slope systems of the study area were studied through 4 topographic sectors (longitudinal and transverse) that represented the stages of geomorphological development of the drainage basin according to the Davis erosion cycle, as well as by knowing the regression categories according to the young classification, the direction of the slopes, the sloping parts and the types of slopes (straight, convex, concave). The results showed an increase in the area of the slope category 5-10, which reached 25.499%, as well as an increase in the percentage of the direction of the southwestern slopes, which reached 16.277%, which is the highest percentage. As for the sloping parts, the maturity area recorded the highest percentage, estimated at 251 slope parts. In addition, the results showed that there is variation in the types of slopes, and the central basin area (maturity stage) of the geomorphological cycle represented all types.