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    May 19

    遥感影像下的汶川大地震

    2008-05-18 信息来源:中国土地勘测规划院,国土资源部土地利用重点实验室

    数据源为2006年5月14日和2008年5月14号的福卫2号多光谱卫星影像(分辨率为8米),以下为部分 地震前、后对比图:

     

     

     

     

     

     

     

     

    汶川地震总灾区地质灾害危害分析
    2008-05-18 信息来源:中国地质调查局

    滑坡造成交通中断

    截至到5月15日,绵阳市仍有四个受灾乡镇因道路被阻断成为“孤镇”,救援人员和受困群众进不去、出不来,人员伤亡情况至今不清楚。四个“孤镇”属于北川、平武、安县三个重灾区,其中安县的茶坪镇、高川乡发生大面积山体滑坡,2万多人与外界联系完全中断,另有两个矿井120余名井下工作人员生死不明。北川县由于地震引发的崩塌、滑坡非常普遍,滚石随处可见,不仅毁坏房屋十分严重,而且使交通受到严重影响,给抗震救灾造成巨大困难。其中,县城附近有较大滑坡3处,距离县城约1千米处的滑坡规模约50万立方米,阻断了公路,使大型救援设备无法进城。北川县陈家坝镇,3个村、22个社多数被泥石流整体吞没,死亡人数已达200人以上,3000余人下落不明。平武县南坝镇至绵阳市道路中断10余千米,至县城道路上两座桥梁全部垮塌,80%民房垮塌。

    地震滑坡堵江

    宝成铁路徽县火车站南约5千米处嘉陵江西岸山体滑坡,掩埋一列油罐火车,引起大火,并堵塞嘉陵江,阻挡江水约28~60万立方米。滑坡体长150米、宽120米、高平均8米,总方量7.2万立方米。

    广元市青川县红光乡河口滑坡,掩埋了石板沟村、东河口村等5个社,造成数百人失踪。滑坡体堵塞清水河及其支流红石河,形成堰赛湖,堰赛湖坝高20~40米,对下游关庄镇及竹园镇构成一定威胁。

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