玉树7.1级地震地质灾害发展趋势分析
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摘要
在参与玉树7.1级地震震区地质灾害应急调查、汛期隐患排查的基础上,收集、整理前人调查与研究的成果数据,分析了震后玉树震区的地质灾害发育特征,并进一步研究了震后玉树灾区地质灾害可能的持续时间、演化趋势以及高风险区的分布区域。结果表明,震后玉树灾区地质灾害将持续10年左右,并以周期震荡式的衰减下降,最终恢复到震前水平;震后地质灾害高风险区将分布在巴塘河谷、结古镇周边山区与郭央烟宋多附近。
Based on field investigation,collection and statistics of data pre-and post-earthquake,the development characteristics of geo-hazards post-earthquake are analyzed.And then,duration,development tendency and high risk distribution areas of the geo-hazards post-earthquake are analyzed.It proved that the active duration of the geo-hazards post-earthquake will be 10a,which decline periodically and wavily to the active level of geo-hazards pre-earthquake;the high risk areas are located in valley of Batang river,the northern and southern mountains around the Jiegu town and the area near the Guoyangyansongduo village.
Based on field investigation,collection and statistics of data pre-and post-earthquake,the development characteristics of geo-hazards post-earthquake are analyzed.And then,duration,development tendency and high risk distribution areas of the geo-hazards post-earthquake are analyzed.It proved that the active duration of the geo-hazards post-earthquake will be 10a,which decline periodically and wavily to the active level of geo-hazards pre-earthquake;the high risk areas are located in valley of Batang river,the northern and southern mountains around the Jiegu town and the area near the Guoyangyansongduo village.
引文
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[2]Inoue K.The Kan to Earthquake(1923)and sediment disasters[J].The Earth Monthly,2001,23:147-154.
[3]KoiT,Hotta N,Ishigak i N,et al.Prolonged impact of earthquake-induced landslides on sediment yield in a mountain watershed:the Tanzawa region,Japan[J].Geomorphology,2008,101:692-702.
[4]林冠慧,张长义.巨大灾害后的脆弱性:台湾集集地震后中部地区土地利用与覆盖变迁[J].地球科学进展,2006,21(2):201-210.
[5]Lin C W,Liu S H,Chang W S,et al.The impact of the Chi-Chi earthquake on the subsequent rain fall induced landslides in the epicentral area of central Taiwan[C]//Proceeding of international conference in commemoration of 10th anniversary of the Chi-Chi earthquake.NTUH,2009:336-338.
[6]Lin C W,Liu S H,Lee S Y,et al.Impacts on the Chi-Chi earthquake on subsequent rain-induced landslides in central Taiwan[J].Engineering Geology,2006,86(2/3):87-101.
[7]殷跃平,潘桂棠,刘宇平,等.汶川地震地质与滑坡灾害概论[M].北京:地质出版社,2009.
[8]Huang R Q,Li W L.Development and Distribution of geohazards Triggered by 5#12 Wenchuan Earthquake in China[J].Science in China(Series E)-Technological Sciences,2009,52(4):810-819.
[9]甘建军,孙海燕,黄润秋,等.汶川县映秀镇红椿沟特大型泥石流形成机制及堵江机理研究[J].灾害学,2012,27(1):5-9.
[10]黄润秋,唐川,李勇,等.汶川地震地质灾害研究[M].北京:科学出版社,2009.
[11]苏生瑞,李松,郝莉莉,等.汶川地震中小鱼洞大桥的变形破坏特征与机理[J].灾害学,2011,26(4):19-23.
[12]黄润秋.汶川地震地质灾害后效应分析[J].工程地质学报,2011,19(2):145-151.
[13]殷跃平,张永双,马寅生,等.青海玉树Ms7.1级地震地质灾害主要特征[J].工程地质学报,2010,18(3):289-296.
[14]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.
[15]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.
[16]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.
[17]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.
[18]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[R].西宁:青海省国土资源厅,2010.
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