TECTONIC FRACTURES AND DRAINAGE PATTERNS AND THEIR IMPACTS IN THE EVOLUTION OF KARST AT (AL JABEL AL AKHDER) NE OF LIBYA CASE STUDY: WADI ZAZA AREA REMOTE SENSING AND GIS INVESTIGATION

Al Jabal Al Akhdar (Green Mountain) area is a highland along the northern eastern part of Libya. The homogeneity of limestone formations of Green Mountain are reflected on the overall shape of the network discharges and spreading phenomena of various karst such as limestone caves, sinkholes, springs, solution cavities with different sizes, multiple levels and corridors and calcareous red soils on the surface of Green Mountain as a natural result of the availability of the basic conditions for the rule of erosion karst in massive carbonate formations as well as the existence of many deep valleys and all common karst features developed in the Eocene-Miocene deposits. The rock units in the Dernah, Bayda and Benghazi formations are consists of dense and highly fractures. The goal of this work to adopt of remote sensing technique in monitoring indicators for the presence of groundwater conditions and produce a map that identifying water seepage area to underground through faults, cracks, joints and the quality of the rocks and the evolution of karst which reflect the best possibility of the paths of groundwater. The accuracy, overall coverage and spatial resolution of remote sensing technologies and GIS applications were used in the study of faults, joints and cracks and drainage patterns using Landsat-8 imagery, DEM and geological maps along with hydrological modeling were integrated to delineate the structure of Wadi Zaza basin.