地震滑坡编目图误差分析

被引:3
作者
许冲
徐锡伟
机构
[1] 中国地震局地质研究所,活动构造与火山重点实验室
关键词
地震滑坡; 编目; 误差分析; 2010年玉树Mw6.9级地震; 2010年海地Mw7.0级地震; 2008年汶川Mw7.9级地震;
D O I
10.16509/j.georeview.2013.06.002
中图分类号
P642.22 [滑坡];
学科分类号
0837 ;
摘要
地震滑坡编目是地震滑坡区域研究的基础。近年来,单次地震事件后的地震滑坡编目工作成果多有出现,然而,地震滑坡编目误差分析,尤其是滑坡的面积与体积误差分析研究却是一项空白。本文提出了一种基于遥感影像空间分辨率的地震滑坡编目误差分析方法,并分别对2010年4月14日玉树Mw6.9级地震触发的2036处滑坡、2010年1月12日海地Mw7.0级地震触发的30828处滑坡、2008年5月12日汶川Mw7.9级地震触发的197481处滑坡编目图进行误差分析。结果表明玉树地震滑坡面积为1.191 km2,误差范围是1.153~1.229 km2(96.81%~103.19%),体积为2.012×106m3,误差范围是1.947×106~2.078×106m3(96.77%~103.28%);海地地震滑坡面积为15.743km2,误差范围是15.118~16.368 km2(96.03%~103.97%),体积为29.698×106m3,误差范围是28.594×106~30.821×106m3(96.28%~103.78%);汶川地震滑坡面积为1160.025km2,误差范围是1072.258~1248.424km2(92.43%~107.62%),体积为4693.159×106m3,误差范围是4372.957×106~5033.739×106m3(93.18%~107.26%)。遥感影像分辨率与滑坡编目误差的关系分析表明不同分辨率遥感影像对地震滑坡编目图误差有明显影响,地震滑坡强频分布与滑坡编目误差的关系分析表明滑坡规模对地震滑坡编目图误差也有明显影响。该地震滑坡编目图误差分析方法可以推广应用于更多的地震滑坡事件。
引用
收藏
页码:1177 / 1188
页数:12
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