Logistic Regression Model and Its Validation for Hazard Mapping of Landslides Triggered by Yushu Earthquake

详细信息   

• 责任者：Xu Chong (Key Laboratory of Active Tectonics and Volcanoes ; Institute of Geology ; Chinese Earthquake Administration ; Beijing 100029 ; China) ; Xu Xiwei
• 刊名：Journal of Engineering Geology
• 出版年：2012
• 卷期：20(3)
• 关键词：滑坡 ; landslides ; 青海 ; Qinghai Province
• 页码：p.326-333
• 图表：3 illus., 23 refs.
• 分类号：1800
• issnNo：ISSN1004-9665
• isbnNo：CN11-3249/P

摘要

At 07：49 （Beijing time）on April 14, 2010, a catastrophic earthquake with Ms 7. 1 struck Yushu County, Qinghai Province, China. 2036 landslides were interpreted from aerial photographs and remote sensing images, verified by selected field checking. The spatial distribution of the landslides was evidently strongly controlled by the locations of the main surface fault ruptures. The landslides commonly occurred close together.  The aim of this study was to apply and validate logistic regression model for the Yushu earthquake triggered landslide hazard mapping. The Geographic Information Systems （GIS） and Remote Sensing（RS） technolozies were used. A spatial database was developed andanalyzed using GIS technology. It includes the landslides and associated controlling parameters which may have influence on the occurrence of landslides. The twelve factors that influence landslide occurrence were created in raster data format base on GIS platform.  The landslide hazard assessment rank result showed that the “very high hazard” level covers about 4.97% of the total study area but has a number of 766 landslides（37.62% of the total landslides number）, which representing good quality of the landslide hazard map. The sequence of the landslide number density percentage descends expeditiously accompany with the hazard level decreasing.