“9·07”彝良地震诱发次生山地灾害调查及减灾建议
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摘要
2012年"9·07"彝良地震诱发大量的次生山地灾害,包括崩塌、滚石、滑坡、泥石流等。其中,崩塌、滚石不仅造成了大量人员伤亡和房屋损毁,也阻塞了救援道路,严重延缓了救援进度。且由于地震及余震多次往复作用,造成大部分山体稳定性降低,在未来几年甚至几十年,山地灾害将进入频发期,灾害链[滚石、崩塌、滑坡-泥石流-堵江(堰塞湖)-溃坝(洪水、更大规模泥石流)]表现将尤为突出。通过地震后对彝良县城洛泽河镇地震重灾区展开次生山地灾害调查,提出震区次生山地灾害的减灾建议。
Serious secondary mountainous disasters,including collapses,rockfalls,landslides and debris flows,were induced by the earthquake stricken Yiliang County of Yunnan Province,China on September 7th,2012.Collapses and rockfalls,as major secondary mountainous disasters,led to not only sever casualties and building damage,but also delayed rescue actions due to consequential road blocking.Decreases in stabilities of most mountain bodies in seismic regions,caused by repeated influences of the earthquake and its aftershocks,may led to a period of frequent secondary disasters in the future years or even decades,featured especially by the disaster chain(rockfalls,collapses,landslides—debris flows—barrier lakes—dam brake(flood,debris flows of even larger scale)).In the present study,after a investigation along Yiliang county and Luozehe town,typical secondary mountainous disasters which may be induced by this earthquake were analyzed and hazard mitigation suggestion were proposed aiming at these secondary disasters.
Serious secondary mountainous disasters,including collapses,rockfalls,landslides and debris flows,were induced by the earthquake stricken Yiliang County of Yunnan Province,China on September 7th,2012.Collapses and rockfalls,as major secondary mountainous disasters,led to not only sever casualties and building damage,but also delayed rescue actions due to consequential road blocking.Decreases in stabilities of most mountain bodies in seismic regions,caused by repeated influences of the earthquake and its aftershocks,may led to a period of frequent secondary disasters in the future years or even decades,featured especially by the disaster chain(rockfalls,collapses,landslides—debris flows—barrier lakes—dam brake(flood,debris flows of even larger scale)).In the present study,after a investigation along Yiliang county and Luozehe town,typical secondary mountainous disasters which may be induced by this earthquake were analyzed and hazard mitigation suggestion were proposed aiming at these secondary disasters.
引文
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[2]The Ministry of Civil Affairs Department of the Relief.The disaster summary of YiLiang earthquake.[EB/OL].http://preview.jzs.mca.gov.cn/article/zqkb/zqhz/201209/20120900354758.shtml.[民政部救灾司.彝良地震灾情汇总[EB/OL].http://preview.jzs.mca.gov.cn/article/zqkb/zqhz/201209/20120900354758.shtml]
[3]China Earthquake Network Center A magnitude of 5.7,5.6 magnitude earthquake occur on the border of YiLiang,weining on September 7,2012.[EB/OL].http://www.cenc.ac.cn/manage/html/402881891275f6df011275f971990001/_content/12_09/07/1347007126477.html[中国地震台网.2012年9月7日云南彝良、贵州威宁交界5.7、5.6级地震[EB/OL].http://www.cenc.ac.cn/manage/html/402881891275f6df011275f971990001/_content/12_09/07/1347007126477.html]
[4]Committee of Chorography of Yiliang County.Yiliang County annals[M].Kunming:Yunnan People's Publishing House,1995[彝良县志编纂委员会.彝良县志[M].昆明:云南人民出版社,1995]
[5]LüYong,Li Gao-liang,Zhang Gui,et al.Characteristics of the geological hazard distribution and the control measures in Yiliang county,Yunnan[J].2009(02):219-223.[吕勇,李高良,张贵,等.彝良县地质灾害分布特征及防治建议[J].2009,2:219223]
[6]Cui Peng,Wei Fangqiang,He Siming,et al.Mountain disasters induced by the earthquake of May 12 in Wenchuan and the disasters mitigation[J].Journal of Mountain Science,2008,26(03):280282.[崔鹏,韦方强,何思明,等.5.12汶川地震诱发的山地灾害及减灾措施[J].山地学报.2008,26(03):280-282]
[7]Xie Hong,Wang Shige,Kong Jiming Distribution and characteristics of mountain hazards induced by the earthquake of May 12 in Wenchuan,China[J]Journal of Mountain Science,2008,26(04):396401[谢洪,王士革,孔纪名.“5.12”汶川地震次生山地灾害的分布与特点[J].山地学报,2008,26(04):396-401]
[8]Shen Jun,He Siming,Wu Yong.Present research status and development trend of rockfall hazards[J].Journal of Catastrophology,2008,04:122-125[沈均,何思明,吴永.滚石灾害研究现状及发展趋势[J].灾害学,2008,04:122-125]
[9]Xie Hong,Zhong Dunlun,Jiao Zhen,et al.Debris flow in Wenchuan quake-hit area in 2008[J].Journal of Mountain Science,2009,27(4):501-509[谢洪,钟敦伦,矫震.等2008年汶川地震重灾区的泥石流[J].山地学报,2009,27(4):501-509]
[10]Yiliang Development and Reform Commission,Yiliang post-disaster reconstruction:755 projects put on the planning,Investment about 28.8 billion[EB/OL].http://www.qianzhan.com/regieconomy/detail/197/120914-e1899d4c.html[彝良发改局.彝良震后灾后重建:775个项目提上规划投资约288亿[EB/OL].http://www.qianzhan.com/regieconomy/detail/197/120914e1899d4c.html]
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