基于遥感调查的汶川地震极重灾区次生地质灾害分布特征
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摘要
汶川8.0级特大地震震区位于地质条件复杂、新构造运动活跃的四川省龙门山地区,此次地震是建国以来中国大陆发生的破坏性最严重的地震,造成了崩塌、滑坡、泥石流和堰塞湖等一系列次生地质灾害。分析和掌握次生地质灾害的分布与活动特征,可为灾区工程整治方案和防治措施提供科学的依据,为灾后重建选址提供参考,为其它地区灾害防治方案的制定提供借鉴。项目综合利用不同时相、不同传感器的光学影像和雷达影像以及其它地质地理资料,在相关遥感和地理信息软件的支持下,进行遥感图像专题信息解译和分析,获取了地震中四川省的10个极重灾县市的次生地质灾害解译数据,以此为基础探讨地震次生地质灾害的空间分布特征、发育特点与相关地质地理因素关系。结果表明,地震次生地质灾害与特定的地层岩性、构造破碎带、坡度等有着密切的联系。
The earthquake zone of Wenchuan Ms8.0 earthquake is located in Longmenshan areas in Sichuan Province.The areas have complex geological conditions,frequent neotectonic movements.This earthquake is the most serious destructive earthquake in mainland China since the P.R.China founded and it caused a series of secondary geological disasters such as the collapse,landslide,mud-rock flows.Analysing the disaster distribution and activity characteristic of secondary geology can provide a scientific basis for the disaster areas to take appropriate remediation programs,prevention and control measures,and also provide the reference for the site selection of reconstruction and the disaster prevention program for other areas.The projects interpreted the RS information by using optical and radar images and other geological and geographic files with the support of related RS and GIS software,and obtained monitoring data of secondary geological disasters in the 10 most serious disaster counties and cities in Sichuan Province.On the basis of the interpretation data,this paper explored the space of its location,distribution and related geological and geographical factors.The results show that the secondary geological disasters are closely linked with the stratigraphic lithology,tectonic fracture zone,slope,etc.
The earthquake zone of Wenchuan Ms8.0 earthquake is located in Longmenshan areas in Sichuan Province.The areas have complex geological conditions,frequent neotectonic movements.This earthquake is the most serious destructive earthquake in mainland China since the P.R.China founded and it caused a series of secondary geological disasters such as the collapse,landslide,mud-rock flows.Analysing the disaster distribution and activity characteristic of secondary geology can provide a scientific basis for the disaster areas to take appropriate remediation programs,prevention and control measures,and also provide the reference for the site selection of reconstruction and the disaster prevention program for other areas.The projects interpreted the RS information by using optical and radar images and other geological and geographic files with the support of related RS and GIS software,and obtained monitoring data of secondary geological disasters in the 10 most serious disaster counties and cities in Sichuan Province.On the basis of the interpretation data,this paper explored the space of its location,distribution and related geological and geographical factors.The results show that the secondary geological disasters are closely linked with the stratigraphic lithology,tectonic fracture zone,slope,etc.
引文
[1]杨森楠,杨巍然.中国区域大地构造学[M].北京:地质出版社,1985:3.
[2]乔彦肖,邓素贞,张少才.冀西北地区泥石流发育的环境因素遥感研究[J].中国地质灾害与防治学报,2004,15(3):106~110.
[3]赵俊华.舟曲县滑坡泥石流遥感影像判读与灾害防治[J].人民长江,2004,35(12):1~4.
[4]贾东,朱艾斓,陈竹新,等.青藏高原东缘龙门山冲断带与四川盆地的现今构造表现:数字地形和地震活动证据[J].地质科学,2007,42(1):31~44.
[5]黄润秋,许强.中国典型灾难性滑坡[M].北京:科学出版社,2008:7.
[6]周荣军,李勇,DENSMORE A L,等.青藏高原东缘活动构造[J].矿物岩石,2006(26):40~51.
[2]乔彦肖,邓素贞,张少才.冀西北地区泥石流发育的环境因素遥感研究[J].中国地质灾害与防治学报,2004,15(3):106~110.
[3]赵俊华.舟曲县滑坡泥石流遥感影像判读与灾害防治[J].人民长江,2004,35(12):1~4.
[4]贾东,朱艾斓,陈竹新,等.青藏高原东缘龙门山冲断带与四川盆地的现今构造表现:数字地形和地震活动证据[J].地质科学,2007,42(1):31~44.
[5]黄润秋,许强.中国典型灾难性滑坡[M].北京:科学出版社,2008:7.
[6]周荣军,李勇,DENSMORE A L,等.青藏高原东缘活动构造[J].矿物岩石,2006(26):40~51.
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