DISTRIBUTION REGULARITY AND DEVELOPMENT CHARACTERISTICS OF GEOHAZARDS IN YUSHU EARTHQUAKE AREA

WANG Jiayun; ZHANG Chenghang; GAO Bo; FENG Wei

Volume 21 Issue 4

Aug. 2013

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WANG Jiayun, ZHANG Chenghang, GAO Bo, FENG Wei. 2013: DISTRIBUTION REGULARITY AND DEVELOPMENT CHARACTERISTICS OF GEOHAZARDS IN YUSHU EARTHQUAKE AREA. JOURNAL OF ENGINEERING GEOLOGY, 21(4): 508-515.

Citation:

WANG Jiayun, ZHANG Chenghang, GAO Bo, FENG Wei. 2013: DISTRIBUTION REGULARITY AND DEVELOPMENT CHARACTERISTICS OF GEOHAZARDS IN YUSHU EARTHQUAKE AREA. JOURNAL OF ENGINEERING GEOLOGY, 21(4): 508-515.

WANG Jiayun, ZHANG Chenghang, GAO Bo, FENG Wei. 2013: DISTRIBUTION REGULARITY AND DEVELOPMENT CHARACTERISTICS OF GEOHAZARDS IN YUSHU EARTHQUAKE AREA. JOURNAL OF ENGINEERING GEOLOGY, 21(4): 508-515.

Citation:

WANG Jiayun, ZHANG Chenghang, GAO Bo, FENG Wei. 2013: DISTRIBUTION REGULARITY AND DEVELOPMENT CHARACTERISTICS OF GEOHAZARDS IN YUSHU EARTHQUAKE AREA. JOURNAL OF ENGINEERING GEOLOGY, 21(4): 508-515.

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DISTRIBUTION REGULARITY AND DEVELOPMENT CHARACTERISTICS OF GEOHAZARDS IN YUSHU EARTHQUAKE AREA

Xi'an Center of Geological Survey, China Geological Survey, Xi'an 710054

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Received Date: 2012-10-20
Rev Recd Date: 2013-03-01
Publish Date: 2013-08-25

Abstract

Abstract

At 7:49a.m. April 14th 2010,a Ms 7.1 earthquake occurred in Yushu county, Qinghai province, China. The Yushu earthquake not only resulted in destruction of lots of buildings and plenty of casualty, but also brought lots of geo-hazards such as debris flows, rock falls, landslides and ground cracks. So it evidently changed the distribution regularity and development characteristics of the geohazards at the region. Based on field investigations and statistics, the distribution regularity and development characteristics of the geohazards before and after the earthquake are analyzed. The results show that the geohazards scatter in the area and take place from May to July every year. The main types of the geohazards were debris flows and unstable slopes, as well as the main small scale of geohazards before the Yushu earthquake; After the earthquake, the numbers of geohazards increased obviously, and the distribution of geohazards concentrated in the areas where the main faults cross the Valley of Baqu river, the mountain areas of northern Jiegu town and southern of Zhaqu river, and the geohazards distribute sporadically in the areas where far away from the main faults or macroscopic epicenter. The geohazards are controlled evidently not only by the main faults, but also by the shape, altitude and gradient of slopes. The geohazards mainly distributed in the area of within 2km away from north of the main faults, and on the bulgy shape slopes, altitude of 3800～4000m, and the gradient of 25～40,focused on the gradient of 30～35.The geohazards induced by the ground cracks in the mountains develop distinctly, and the numbers of large and middle scales of geohazards increase clearly, so that the harm of geohazards increase greatly. Especially, the geohazards took place more frequently in rain season, which accelerates the development of geohazards in freezing and thawing periods.
- Yushu earthquake,
- Geohazard,
- Distribution regularity,
- Development characteristic

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References

[1] 殷跃平, 张永双,马寅生,等.青海玉树M_S7.1级地震地质灾害主要特征[J].工程地质学报, 2010, 18 (3): 289～296.

Yin Yueping, Zhang Yongshuang, Ma Yinsheng, et al. Research on major characteristics of geohazards induced by the Yushu M_S7.1 earthquake. Journal of Engineering Geology, 2010, 18 (3): 289～296.

[2] Keefer DK.Landslides caused by earthquakes[J]. Geological Society of America Bulletin, 1984, 95: 406～421.

[3] Dai Fuchu,Xu Chong, Yao Xin, et al. Spatial distribution of landslides triggered by the 2008 M_S 8.0 Wenchuan earthquake, China[J]. Journal of Asian Earth Sciences, 2011, 40 (4): 883～895.

[4] 殷跃平. 汶川8级地震地质灾害研究[J].工程地质学报, 2008, 16 (4): 433～444.

Yin Yueping. Research on the geo-hazards triggered by Wenchuan earthquake, Sichuan. Journal of Engineering Geology, 2008, 16 (4): 433～444.

[5] 祁生文, 许强,刘春玲,等.汶川地震极重灾区地质背景及次生斜坡灾害空间发育规律[J].工程地质学报, 2009, 17 (1): 39～49.

Qi Shengwen, Xu Qiang, Liu Chunling, et al. Slope instabilities in the severest disaster areas of 5.12 Wenchuan earthquake. Journal of Engineering Geology, 2009, 17 (1): 39～49.

[6] 黄润秋, 裴向军,李天赋.汶川地震触发大光包巨型滑坡基本特征及形成机理分析[J].工程地质学报, 2008, 16 (6): 730～741.

Huang Runqiu, Pei Xiangjun, Li Tianfu. Basic characteristic and formation mechanism of the largest scale landslide at dagungbao occurred during the Wenchuan earthquake. Journal of Engineering Geology, 2008, 16 (6): 730～741.

[7] 黄润秋, 李为乐.汶川大地震触发地质灾害的断层效应分析[J].工程地质学报, 2009, 17 (1): 19～28.

Huang Runqiu, Li Weile. Fault effect analysis of geo-hazard triggered by Wenchuan earthquake. Journal of Engineering Geology, 2009, 17 (1): 19～28.

[8] 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): 722～729.

Xu Qiang, Huang Runqiu. Kinetics characteristics of large landslides triggered by May 12th Wenchuan earthquake. Journal of Engineering Geology, 2008, 16 (6): 722～729.

[9] 张永双, 马寅生,胡道功,等.玉树地震地表破裂调查与灾后重建避让选址研究[J].地质学报, 2010, 84 (5): 593～605.

Zhang Yongshuang, Ma Yinsheng, Hu Daogong, et al. Investigation and research on the surface rupture of the Yushu earthqu ake and reconstruction site selection. Acta Geologica Sinica, 2010, 84 (5): 593～605.

[10] 许冲, 徐锡伟,戴福初,等.2010 年4 月14 日玉树地震滑坡空间分布与控制变量分析[J].工程地质学报, 2011, 19 (4): 505～510.

Xu Chong, Xu Xiwei, Dai Fuchu, et al. Analysis of spatial distribution and controlling parameters of landslides triggered by the April 14, 2010 Yushu earthquake. Journal of Engineering Geology, 2011, 19 (4): 505～510.

[11] 郭小花, 李小林,赵振,等.青海4·14 玉树地震地质作用对地质环境影响分析[J].工程地质学报, 2011, 19 (5): 685～696.

Guo Xiaohua, Li Xiaolin, Zhao Zhen, et al. Effects of 4·14 Yushu earthquake in Qinghai on geological enviroment. Journal of Engineering Geology, 2011, 19 (5): 685～696.

[12] 闻学泽, 徐锡伟,郑荣章,等.甘孜—玉树断裂的平均滑动速率与近代大地震破裂[J].中国科学, 2003, 33 (增): 199～208.

Wen Xueze, Xu Xiwei, Zheng Rongzhang, et al. Average slip-rateand recent large earthquake ruptures along the Ganzi—Yushu fault. Science in China, 2003, 33 (S): 199～208.

[13] 周荣军, 闻学泽,蔡长星,等.甘孜—玉树断裂带的近代地震与未来地震趋势估计[J].地震地质, 1997, 19 (2): 115～124.

Zhou Rongjun, Wen Xueze, Cai Changxing, et al. Recent earthquakes and assessment of seismic tendency on the Ganzi Yushu fault zone. Seismology and Geology, 1997, 19 (2): 115～124.

[14] 都昌庭, 李文巧,卢宁,等.2006年青海玉树地震类型和发震构造分析[J].西北地震学报, 2007, 29 (3): 271～274.

Du Changting, Li Wenqiao, Lu Ning, et al. Analysis on the seismic type and seimogenic structure of Yushu earthquake in Qinghai province in 2006.Northwestern Seismological Journal, 2007, 29 (3): 271～274.

[15] 赵家绪, 李玉军,张力征,等.青海玉树"4·14"地震灾区地质灾害应急排查报告.2010.

Zhao Jiaxu, Li Yujun, Zhang Lizheng, et al. Urgency Investigation Report of Geohazrad in 4·14 Yushu Earthquake Stroked Area, Qinghai Province.2010.

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