| 历史强震对渭河中游群发大型滑坡的诱发效应反演 |
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| 关键词:historical earthquake landslide Newmark displacement model inversion middle reaches of the Weihe River loess |
| 基金项目:国家自然科学基金项目(编号: 41102165)；国家“十二五”科技支撑计划课题(编号: 2012BAK10B02)；中国地质调查局地质调查项目(编号: 1212011140003; 12120114035501) |
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| Inversion of the Inducing Effects of Historical Strong Earthquakes on Large-scale Landslides around the Middle Reaches of the Weihe River |
| Exemplified by the middle reaches of the Weihe River, the authors tentatively developed a new method for the study of the inducing effects of historical earthquakes on regional large-scale landslides. First, an analysis of regional active tectonics and fault-controlling slope sliding revealed that the inducing effects of historical strong earthquakes on regional large-scale landslides around the middle reaches of the Weihe River must not be neglected. Secondly, the farthest epicentral distance of seismic landslides distribution was calculated and analyzed. On such a basis, the authors hold that inducing effects of 4 key historical strong earthquakes within 300km around the middle reaches of the Weihe River should be studied with special attention, i.e., Qishan MS7.0 earthquake in 780 BC, Tianshui south MS8.0 earthquake in 1654 AD, Huaxian MS8.25 earthquake in 1556 AD and Haiyuan MS8.5 earthquake in 1920 AD. Then, taking Qishan earthquake as an example, the authors described the inversion method for seismic landslide displacement and hazard assessment based on Newmark displacement model. The other 3 historical earthquakes triggering landslide displacement were inversed, and the inversion results were quantitatively compared with the distribution of existing large-scale landslides to show the spatial matching degree. The result indicates that Tianshui south MS8.0 earthquake served as the strongest one among the earthquakes inducing regional large-scale landslides around the middle reaches of the Weihe River area. |
| WANG Tao,WU Shu-ren,SHI Ju-song,XIN Peng,LIANG Chang-yu.2015.Inversion of the Inducing Effects of Historical Strong Earthquakes on Large-scale Landslides around the Middle Reaches of the Weihe River[J].Acta Geoscientica Sinica,36(3):353-361. |
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