Abstract
Using the Geographic Information Systems (GIS) technique and remote-sensing images and aerial photographs collected from the Wenchuan earthquake region, this chapter analyzes the occurrence of geo-hazards and their correlations with the distance from the co-seismic fault, slope steepness, elevation, and rock type. Our findings show that the geo-hazards triggered by earthquakes are distributed along co-seismic fault and rivers. Specifically, geo-hazards tend to concentrate in areas near the hanging wall of co-seismic fault more than in those near the footwall. The slope’s steepness is also a key factor deciding the development of quake-induced geo-hazards, since most of the latter are distributed at the mountain areas within the range of 20–50°. In addition, geo-hazards are found to have a close relationship to the elevation and micro-landform and that thin ridge, isolated or full-face space mountains are most sensitive to seismic waves, and thus have a striking amplification effect on geo-hazards. Lastly, we suggest that the above findings may serve as an important basis for the reconstruction of earthquake-hit mountain regions.
Translated by Deng Lin, Tongji University; scientific editing by Rongxing Guo. The last section of this paper belongs to that of a research group led by Liu Shiqing.
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- 2.
The sources of the data on remote-sensing images and aerial photographs used in this chapter are from: (1) the Japanese ALOS satellite image data (resolution is 10 m); (2) the Land Resources Aero-geophysical Survey Center of China (resolution is 0.5 m); and (3) the authors’ collections.
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The fore-mountain fault of the Longmen Mountain shows surface rupture (He et al. 2008).
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This section is completed by a research group. Shiqing Liu (Institute of Regional Economics and the Western Development Research Center, Sichuan Academy of Social Sciences) is the Team Leader The members include Xu Ying-ming (Beijing University of Technology), Li Mingquan, Guo Lan, Wang Xinqian, Liu Yuyang, Xu Xueshu, La Mingying, Liu Nannan (Sichuan Academy of Social Sciences); Pan Shulin, Guo Zongfeng (Yibin College, Sichuan), Li Hechao, Chen Haijun, Sun Ningning, Yu Xiangke (Sichuan Institute of Land Planning Survey); Deng Lin (Tongji University, Shanghai); Deng Lixin (Chengdu Municipal People’s Government Research Office, Sichuan); He Yinwu (Chengdu Municipal Tourism Bureau, Sichuan); Bian Zaibin (Dujiangyan Bureau of Cultural Heritage, Sichuan).
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Huang, R., Li, W. (2011). Characteristics of Earthquakes in Mountain Areas and Post-earthquake Management. In: Guo, R., Freeman, C. (eds) Managing Fragile Regions. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-6436-6_7
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