التحليل الجيومورفولوجي لنموذج الارتفاعات الرقمية لحوض وادي درنة

الملخص EN

This study deals with a geomorphological analysis of the Digital Elevation Model (DEM) of the basin of the Dernas’ valley ; with the aim of producing digital maps of altitudes, slopes, slope directions, and the drainage network, to obtain the accurate morphometric measurements of the basin.

the Geographic Information Systems techniques (GIS), was applied to provide a wide and reliable database for the geomorphological and hydrological studies of the water basin of the Dernas’ valley.

this study relied on the descriptive analytical method in describing and analyzing the various digital maps, furthermore ; the study depends on the quantitative method, which used to analyze some morphometric parameters describing the basin dimensions, its morphological and terrain characteristics, in addition to the characteristics of the drainage network.

the results indicated that the shape of the basin is close to the elongation, with decreased ratios of terrain and slope degree, moreover ; the value of its hypsometric integration represented that it has reached the maturity stage in its erosive cycle, and its drainage density is considered to be low due to the small number of streams with short lengths.