THE GEOLOGIC CONTRIBUTION TO MOUNTAIN SLOPE INSTABILITY AND ITS EFFECT ON LANDSLIDES. A CASE STUDY TO THE GHARIAN AREA, NW LIBYA
This research investigates the causes of Landsides at Gharian Tripoli highway. Geomorphology, geology, and climate play the most important role in preparatory process of landslide initiation in any region.
The area has specific geological features, where the clastic rocks formations and carbonates formations exhibit good exposures that give a clear knowledge for causes of the landside. Data presented here are based on a detailed fieldwork mapping and analysis of rainfall statistical data, which were monitored from 2011 until 2019.
The results of this study confirm that the weakness in the rock blocks will lead to the movements of the most important rock fall (Landsides) because the angle of stability of blocks ranging from (60 - 89) with NNW faults -dipping steeply NE and down throwing to the NE.
The excavation works used to make the Gharian Tripoli highway on the slopes had significant impact in determining the angle of stability of the blocks and making the rock (road cut) more susceptible to erosion factors.