汶川地震滑坡在两个典型区域内的分布研究

doi:10.7523/j.issn.2095-6134.2010.5.007

中国科学院大学学报 ›› 2010, Vol. 27 ›› Issue (5): 621-631.DOI: 10.7523/j.issn.2095-6134.2010.5.007

汶川地震滑坡在两个典型区域内的分布研究

许冲^1,2, 戴福初¹, 姚鑫^3,4, 陈剑⁵, 涂新斌¹, 肖建章¹, 孙瑜⁵

1. 中国科学院地质与地球物理研究所,北京 100029;
2. 中国科学院研究生院,北京 100049;
3. 国土资源部新构造运动与地质灾害重点实验室,北京 100081;
4. 中国地质科学院地质力学研究所,北京 100081;
5. 中国地质大学(北京),北京 100083

收稿日期:2010-03-11 修回日期:2010-04-14 发布日期:2010-09-15
通讯作者: 许冲
基金资助:
国家自然科学基金(40901005)、中国地质科学院地质力学研究所基本科研业务费(DZLXJK200906)、《科技导报》博士生创新研究(kjdb200902-5)资助 

Study on the distribution of landslides triggered by the May 12, 2008 Wenchuan earthquake in two square typical regions

XU Chong^1,2, DAI Fu-Chu¹, YAO Xin^3,4, CHEN Jian⁵, TU Xin-Bin¹, XIAO Jian-Zhang¹, SUN Yu⁵

1. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;
2. Graduate University of the Chinese Academy of Sciences, Beijing 100049, China;
3. Key Laboratory of Neotectonic and Geohazard, Ministry of Land and Resources, Beijing 100081, China;
4. Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China;
5. ;
6.

Received:2010-03-11 Revised:2010-04-14 Published:2010-09-15

摘要/Abstract

摘要：

汶川地震诱发了数以万计的滑坡.选择2个地震滑坡重灾区域(A/B),基于空间分析方法,对地震滑坡分布与地层岩性、坡度、高程、地震动峰值加速度以及发震断裂距离之间的关系进行统计分析.结果表明,研究区A内滑坡最易发岩组为石墨片岩、石英岩岩组,研究区B内滑坡最易发岩组为粉砂岩、砂岩、硅质岩岩组;2研究区内滑坡易发程度均随着坡度的增加而升高,A区的滑坡发生优势坡度为44°,B区为38°;滑坡发育与高程均存在一定的对应关系;滑坡分布与地震动峰值加速度没有明显的对应关系,但是与距离发震断裂具有良好的对应关系,且上盘滑坡发育程度明显高于下盘.

关键词: 汶川地震, 滑坡, 空间分布, 统计分析, GIS

Abstract:

Tens of thousands of landslides were triggered by Wenchuan earthquake. The purpose of this study was to find correlations of landslide occurrence with formation lithology, slope gradient, elevation, peak ground acceleration, and distance from seismogenic fault in two selected landslide incidental areas(A/B), using spatial analysis methods. The results show that rock groups of graphite schist and quartzite had the most concentrated landslide activities in area A, while siltstone, sandstone, and chert rock groups in area B. The landslide susceptibility levels have a positive correlation with slope steepness in both the areas. The advantage slope gradient is 44°in area A and 38° in area B. There were also relations between elevation and earthquake-induced landslide distribution. Peak ground acceleration has no positive or consistent correlation with earthquake-induced landslide occurrence, but the distance from seismogenic fault shows approximate positive correlation with landsliding. There is a higher landslide distribution area ratio on the upper plate than on the lower plate.

Key words: Wenchuan earthquake, landslide, spatial distribution, statistical analysis, geographic information systems

中图分类号:

P642
P694

许冲, 戴福初, 姚鑫, 陈剑, 涂新斌, 肖建章, 孙瑜. 汶川地震滑坡在两个典型区域内的分布研究[J]. 中国科学院大学学报, 2010, 27(5): 621-631.

XU Chong, DAI Fu-Chu, YAO Xin, CHEN Jian, TU Xin-Bin, XIAO Jian-Zhang, SUN Yu. Study on the distribution of landslides triggered by the May 12, 2008 Wenchuan earthquake in two square typical regions[J]. , 2010, 27(5): 621-631.

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汶川地震滑坡在两个典型区域内的分布研究

Study on the distribution of landslides triggered by the May 12, 2008 Wenchuan earthquake in two square typical regions

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