| Technology Application |
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Remote sensing survey of secondary geological disasters triggered by Lushan earthquake in Sichuan Province and tentative discussion on disaster characteristics |
| GUO Zhaocheng, TONG Liqiang, ZHENG Xiongwei, QI Jianwei, WANG Jianchao |
| China Aero Geophysical Survey and Remote Sensing Center for Land and Resources, Beijing 100083, China |
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Abstract On April 20,2013,a catastrophic earthquake with MS 7.0 occurred in Lushan County,Sichuan Province. Using the multi-source remote sensing data acquired before and after the earthquake,the authors analyzed the secondary geological disasters and their spatial distribution based on interactive visual interpretation and field survey. The remote sensing investigation results have shown that the earthquake has triggered 1 678 secondary geological disasters,covering an area of about 8.354 km2. The secondary geological disasters are characterized by smaller scale and dominance of collapse and rockfall types. Using the terrain data before the earthquake,the authors analyzed the relationship between the distribution of secondary geological disasters and the elevation and slope. Statistical and analytical results show that 95% of the secondary geological disasters are located in the area with the elevation between 750~1 850 m,and 82.5% of the secondary geological disasters are located in the area with the slope between 15 °~ 50°. With the increasing slopes,however, the incidence of the secondary geological disasters increases significantly. The secondary geological disasters assume remarkable linear arrangements, with some distributed along the NE-trending seismogenic fault and the others along the mountain ridge and river valley. The results obtained by the authors provide some important information for the emergency decision-making,rescue and reconstruction after the earthquake.
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| Keywords
Charter
remote sensing
data acquisition mechanism
disaster
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Issue Date: 01 July 2014
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[1] 张广伟,雷建设.四川芦山7.0级强震及其余震序列重定位[J].地球物理学报,2013,56(5):1764-1771. Zhang G W,Lei J S.Relocations of Lushan,Sichuan strong earthquake(MS7.0)and its aftershocks[J].Chinese Journal of Geophysics,2013,56(5):1764-1771.
[2] 陈晓清,崔鹏,游勇,等.4·20芦山地震次生山地灾害与减灾对策[J].地学前缘,2013,20(3):29-34. Chen X Q,Cui P,You Y,et al.Secondary mountain disasters induced by 4·20 Lushan earthquake and disaster mitigation[J].Earth Science Frontiers,2013:20(3):29-34.
[3] 殷跃平.汶川八级地震地质灾害研究[J].工程地质学报,2008,16(4):433-444. Yin Y P.Researches on the geo-hazards triggered by Wenchuan earthquake,Sichuan[J].Journal of Engineering Geology,2008,16(4):7-12.
[4] 张永双,雷伟志,石菊松,等.四川5·12地震次生地质灾害的基本特征初析[J].地质力学学报,2008,14(2):109-116. Zhang Y S,Lei W Z,Shi J S,et al.General characteristics of 5·12 earthquake-induced geohazards in Sichuan[J].Journal of Geomechanics,2008,14(2):109-116.
[5] 许冲,戴福初,陈剑,等.汶川Ms8.0地震重灾区次生地质灾害遥感精细解译[J].遥感学报,2009,13(4):754-762. Xu C,Dai F C,Chen J,et al.Identification and analysis of secondary geological hazards triggered by a magnitude 8.0 Wenchuan earthquake[J].Journal of Remote Sensing,2009,13(4):754-762.
[6] 许强,黄润秋.5·12汶川大地震诱发大型崩滑灾害动力特征初探[J].工程地质学报,2008,16(6):721-729. Xu Q,Huang R Q.Kinetics characteristics of large landslide triggered by May 12th Wenchuan earthquake[J].Journal of Engineering Geology,2008,16(6):721-729.
[7] 童立强."5·12"汶川大地震极重灾区地震堰塞湖应急遥感调查[J].国土资源遥感,2008,20(3):61-64. Tong L Q.Emergency remote sensing investigation of barrier lakes at the quake at the quake center area caused by"5·12"Wenchuan strong earthquake[J].Remote Sensing for Land and Resources,2008,20(3):61-64.
[8] 童立强,郭兆成.典型滑坡遥感影像特征研究[J].国土资源遥感,2013,25(1):86-92. Tong L Q,Guo Z C.A study of remote sensing image features of typical landslides[J].Remote Sensing for Land and Resources,2013,25(1):86-92.
[9] 徐锡伟,陈桂华,于贵华,等.芦山地震发震构造及其与汶川地震关系讨论[J].地学前缘,2013,20(3):11-20. Xu X W,Chen G H,Yu G H,et al.Seismogenic structure of Lushan earthquake and its relationship with Wenchuan earthquake[J].Earth Science Frontiers,2013,20(3):11-20.
[10] 张勇,许力生,陈运泰.芦山4·20地震破裂过程及其致灾特征初步分析[J].地球物理学报,2013,56(4):1408-1411. Zhang Y,Xu L S,Chen Y T.Rupture process of the Lushan 4·20 earthquake and preliminary analysis on the disaster-causing mechanism[J].Chinese Journal Geophysics,2013,56(4):1408-1411.
[11] 李小文.汶川震灾中遥感的应急与反思[J].遥感学报,2008,12(6):838. Li X W.Emergency reaction and introspection of remote sensing in Wenchuan earthquake disaster[J].Journal of Remote Sensing,2008,12(6):838.
[12] 刘金玉,张景发,刘国林.基于高分辨率SAR图像成像机理的震害信息分析[J].国土资源遥感,2013,25(3):61-65. Liu J Y,Zhang J F,Liu G L.An analysis of earthquake damage information based on imaging mechanism of the high resolution SAR image[J].Remote Sensing for Land and Resources,2013,25(3):61-65. |
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2014,
Vol. 26
