IMHE OpenIR  > Journal of Mountain Science  > Journal of Mountain Science-2012  > Vol9 No.2
Risk Assessment of Secondary Geological Disasters Induced by the Yushu Earthquake
NIU Quanfu; CHENG Weiming; LIU Yong; XIE Yaowen; LAN Hengxing; CAO Yanrong
Corresponding AuthorCHENG Weiming
Source PublicationRisk assessment

he Yushu Ms 7.1 earthquake occurred on April 14, 2010 in Qinghai Province, China. It induced a mass of secondary geological disasters, such as collapses, landslides, and debris flows. Risk assessment maps are important for geological disaster prevention and mitigation, and also can serve as a guide for post-earthquake reconstruction. Firstly, a hazard assessment index system of secondary geological disasters in the earthquake region was built in this paper, which was based on detailed analysis of environmental and triggering factors closely related to geological disasters in the study area. GIS technology was utilized to extract and analyze the assessment index. Hazard assessment maps of secondary geological disasters were obtained by spatial modeling and overlaying analysis. Secondly, an analysis of the vulnerability of hazard bearing bodies in the area was conducted, important information, such as, population density, percentage of arable land, industrial and agricultural outputs per unit area were regarded as assessment indices to evaluate socio-economic vulnerability. Thirdly, the risk level of secondary geological disasters of the area was obtained by the formula: Risk=Hazard ´ Vulnerability. Risk assessment maps were categorized into four levels, including “low”, “moderate”, “high” and “very high”. These results show that some urban areas are at very high risk, including Jiegu, Chengwen, Xiaxiula and Sahuteng towns. This research can provide some references and suggestions to improve decision-making support for emergency relief and post-earthquake reconstruction in the study area.

KeywordYushu Earthquake Secondary Geological Disasters (Sgd) Hazard Assessment Socio-economic Vulnerability Risk Assessment
Indexed BySCI
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Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
CollectionJournal of Mountain Science_Journal of Mountain Science-2012_Vol9 No.2
Corresponding AuthorCHENG Weiming
Recommended Citation
GB/T 7714
NIU Quanfu,CHENG Weiming,LIU Yong,et al. Risk Assessment of Secondary Geological Disasters Induced by the Yushu Earthquake[J]. Risk assessment,2012,9(2):232-242.
APA NIU Quanfu,CHENG Weiming,LIU Yong,XIE Yaowen,LAN Hengxing,&CAO Yanrong.(2012).Risk Assessment of Secondary Geological Disasters Induced by the Yushu Earthquake.Risk assessment,9(2),232-242.
MLA NIU Quanfu,et al."Risk Assessment of Secondary Geological Disasters Induced by the Yushu Earthquake".Risk assessment 9.2(2012):232-242.
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