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Surface deformation at the epicenter of the May 12,2008 Wenchuan M8 Earthquake,at yingxiu Town of Sichuan Province,China

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Science China(Technological Sciences) 2008年第S2期51卷 154-163页

作者： DONG ShaoPeng,HAN ZhuJun & AN YanFen National Center of Seismic Fault Study,Institute of Geology,China Earthquake Administration,Beijing 100029,China National Center of Seismic Fault Study Institute of Geology China Earthquake Administration Beijing China

Surface deformation,along National Highway 213 at the epicenter of Wenchuan M8 earthquake,at yingxiu Town of Sichuan Province,China,is surveyed and measured in *** results show two distinct *** is that no horizontal displacement displays,or dextral strike-slip component at the observation point can not be found basically,the other is that uplift amount is 2.72 m,and the short-ening amount is 0.38 m,which reflects thrust shortening deformation is not *** crust uplift amount of 2.71 m is distributed in a belt with width of 60 *** model of lower crustal flow proposed by Royden et al.(1997) about the dynamic process in eastern margin of the Tibetan Plateau seems more suitable to explain the seismic surface deformation characteristics at yingxiu Town,the epicenter of the May 12,2008 Wenchuan M8 Earthquake.

关键词： Wenchuan M8 Earthquake yingxiu Town surface deformation

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Vegetation Restoration Monitoring in yingxiu Landslide Area after the 2008 Wenchuan Earthquake

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Earthquake Research in China 2020年第1期34卷 157-166页

作者： HE Jing ZHANG Keke LIU Xiuju LIU Gang ZHAO Xuqiang XIE Zhongyuan LU Heng College of Earth Sciences Chengdu University of TechnologyChengdu 610059China State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of TechnologyChengdu 610059China China Petroleum Engineering and Construction Corp.Southwest Company Chengdu 610017China Chengdu Planning Information Technic Center Chengdu 610042China State Key Laboratory of Hydraulics and Mountain River Engineering Sichuan UniversityChengdu 610065China College of Hydraulic and Hydroelectric Engineering Sichuan UniversityChengdu 610065China

A total of more than 50000 landslides has occurred in Sichuan province since the"5·12"Wenchuan earthquake,resulting in serious damage to the surface vegetation in southwestern *** this study,we select yingxiu,the epicenter of Wenchuan earthquake,as the experimental *** vegetation coverage information of the experimental area is extracted from the remote sensing images collected in the year of 2005,2011 and 2013,*** surface vegetation coverage in different periods is analyzed,and the vegetation recovery rate of the whole area is *** experimental results show that in the first three years after the earthquake,the speed of vegetation restoration is slow,and the vegetation coverage rate is less than 20%better than 0.241,while in 2013,the vegetation coverage increases significantly.

关键词： Wenchuan earthquake yingxiu landslide area NDVI Vegetation restoration

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