Global Geology 2009, 12(1) 5-12 DOI:     ISSN: 1673-9736 CN: 22-1371/P

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Keywords
Al-Huwayshah
rockfall
landslide
rainfall
earthquake
Authors
ArefM. O. AL-JABAL I1
2
NIE Lei1
Abdo S. AL-MAQTARY2
Hussein AL-AKHAL I2
PubMed
Article by ArefM. O. AL-JABAL I1
Article by 2
Article by NIE Lei1
Article by Abdo S. AL-MAQTARY2
Article by Hussein AL-AKHAL I2

Causes of rockfalls in Al-Huwayshah area, Yemen

ArefM. O. AL-JABALI1, 2, NIE Lei1, Abdo S. AL-MAQTARY2, Hussein AL-AKHALI2

1. College of Constriction Engineering, Jilin University, Changchun 130026, China; 2. Geological Survey and Mineral Resources Board, Sanapa, Yemen

Abstract

According to topography of Yemen, most areas and villages are located at obligated crest, toe of mountain and under cliffs. Therefore Al-Huwayshah consisting of Tawilah sandstone group is characterized by steep slope reach to 90°in some areas. This area is affected by strong tectonic movements and faults that occurred during the geological epochs. This effect enhances to find out fractures and joints aswell as the rocks become brittle and ready to slide depending on the position of area. And there are some fractures and joints on the surface of the areas due to tectonic movement associated with opening the Red Sea and Gulf of Aden. The rainfalls, fractures, joints, earthquakes, gravity, vegetations, temperatures and human activities play a big role in the processes of rockfalls and landslides in this area. All those factors are considered as the basic causes and catalyzed factors for occurrence of rockfall in the studide area. In addition, the authors carried out laboratory test for many rock samples to get the physical properties of the rocks.

Keywords Al-Huwayshah   rockfall   landslide   rainfall   earthquake  
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