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Volume :43 Issue : 165 2017      Add To Cart                                                                    Download

Landslides Hazard and Risk Vulnerability for Dahrwadi (West of Sana'a) Using the Geographic Information System (GIS) .

Auther : En. Saleh A. Magohan - Dr. Aref M. AL-Jabali

     The study area is located in the western part of Sana'a. (the  capital city foemen) and 14 km from the center of the city. This area characterized by an urban expansion and tourism location. Therefore, it was essential to prepare and produce the landslide Hazard and Risk Vulnerability maps for this area using the Geographic Information System (GIS). The study area is divided into Pixels through satellite images, geological and topographic maps. Each pixel represent 125m2 on earth. Thus, Rock Type, Geomorphology, Slopes, Intensity and Trends of Joints, the annual rainfall, Seismic events and human activities contributed to the lack of the stability of Slopes. As a result of all these works, landslides Hazard map is produced that classified the area into very high, high, moderate, low and very low. It was recognized that about (56.14%) of the study area are located in the very high and high Hazard levels. The very high level Hazard represented  by rock Fall, the high level Hazard represented by Toppling and Rolling, the moderate level Hazard represented by Planer Slide.
     Also, the rock vulnerability and the degree susceptibility maps were produced using the (GIS). Risk levels were calculated and identified the expected human and material components in the area. The study concluded that the government must carry out geo engineering studies to decrease the potential Hazard in the area.

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May 18, 2017

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