التحليل الرقمي لبعض الخصائص المورفومترية لحوض وادي طبرقاية بالجبل الاخضر . شمال شرق ليبيا باستخدام نظم المعلومات الجغرافية

Abstract

This study deals with the morphometric analysis of Wadi Tabarkia basin, located in the Jabal Al Akhdar region in eastern Libya, as this study relied on the analysis of the digital elevation model DEM of the valley basin, and the study aimed to identify the natural characteristics of the basin and the morphometric characteristics and characteristics of the river drainage network, and among the most important findings of these The study found that the length of the basin reached 13.59 km, and its maximum width was 7.34 km, while the total area of the basin was 62.1972 km², and its circumference was 45.50 km. It was also concluded through the analysis of climate data that the water surplus in the basin region reached 732.74 mm, while the water deficit reached 26.12 mm. According to the climatic data of the study area, and the study showed through analyzing the digital elevation model that the drainage network in the Wadi Tabarka basin consists of 222 waterways, with a total length of 120.2 km, where the number of sewers varied according to each rank, reaching 113 streams of the first rank, and 51 A water course for the second order, 31 streams for the third order, 26 for the fourth order, and one water course for the fifth order. The study also showed that the rate of flocculation is 0.74, which indicates that the basin is still in the leaching stage. C, It was also found that the general rate of decay reached 28.1, which is a high percentage indicating the small area of the basin and the intensity of the erosion process working on the slopes of the basin.