基于遥感和GIS技术的北川县地震次生地质灾害分布特征
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摘要
以北川县为研究区域,利用多源、多时相卫星数据判读地震次生地质灾害,并在ARCGIS软件的支持下,对地震次生地质灾害的空间分布规律及其影响因素做相关性研究。结果发现,地层岩性、构造、水系、地形地貌等是地震次生地质灾害分布的主要影像因素。不同空间区域上各主要控制因素对次生地质灾害发育的控制力不一样。北川县的地震次生地质灾害沿北川—映秀断裂带密集分布,受岩石地层结构组分的影响,在志留纪地层中集中发育,受地形地貌的影响,在地形坡度30°—70°区域内集中发育。这些分布规律的发现,可以及时为北川县防灾规划和灾后重建提供科学依据。
In this paper,we study the spatial distribution rules of earthquake-induced secondary geological disasters and the relationships between the disasters and their impact factors,based on multi-source multi-temporal satellite data,which was support in ARCGIS software platforms.The results show that stratum lithology,geology structure,water system and topography are major controlling factors in disasters;mean while,different regions have different controlling factors,The distribution of BEICHUAN disasters is along the BeiChuan-YingXiu fault zone as banded;a mass of disasters develops in Silurian strata because of structural components;a mass of disasters affected by the topography developed in the terrain with slope of 30°—70°.The distribution regularity of disasters can provide scientific foundation for prevention earthquake plans and reconstruction after earthquake.
In this paper,we study the spatial distribution rules of earthquake-induced secondary geological disasters and the relationships between the disasters and their impact factors,based on multi-source multi-temporal satellite data,which was support in ARCGIS software platforms.The results show that stratum lithology,geology structure,water system and topography are major controlling factors in disasters;mean while,different regions have different controlling factors,The distribution of BEICHUAN disasters is along the BeiChuan-YingXiu fault zone as banded;a mass of disasters develops in Silurian strata because of structural components;a mass of disasters affected by the topography developed in the terrain with slope of 30°—70°.The distribution regularity of disasters can provide scientific foundation for prevention earthquake plans and reconstruction after earthquake.
引文
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陈国光,计凤桔,周荣军等.2007.龙门山断裂带晚第四纪活动性分段的初步研究.地震地质,29(3):657—673
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冯东霞,余德清,龙解冰.2002.地质灾害遥感调查的应用前景.湖南地质,21(4):318—324
刘凤民,张立海,刘海青等.2006.中国地震次生地质灾害危险性评价.地质力学学报,12(2):127—131
建,白世彪,陈晔.2004.Surfer8地理信息制图.北京:中国地图出版社
赵小麟,陈社发.1994.岷山隆起的构造地貌学研究.地震地质,16(4):429—439
Dang A R.2003.Erdas imagine remote sensing image processing.Beijing.Tsinghua University Press
Feng D X,Yu D Q,Long J B.2002.Application foregroundresearching of remote sensing technology about geologic disaster.Hunan Geology,21(4):318—324
Liu F M,Zhang L H,Liu H Q,et al.2006.Danger assessment ofearthquake-induced geological disasters in China.Journal ofGeomechanics,12(2):127—131
Wang J,Bai S B,Chen Y.2004.Geography information cartographyby surfer8software.Beijing Sino Maps Press
Zhao X L,Deng Q D,Chen S F.1994.Tectonic geomorphology ofMingshan uplift in western Sichuan,Southwestern China.Sei-smology and Geology,16(4):429—439
陈国光,计凤桔,周荣军等.2007.龙门山断裂带晚第四纪活动性分段的初步研究.地震地质,29(3):657—673
党安荣.2003.ERDAS IMAGINE遥感图像处理方法.北京:清华大学出版社
冯东霞,余德清,龙解冰.2002.地质灾害遥感调查的应用前景.湖南地质,21(4):318—324
刘凤民,张立海,刘海青等.2006.中国地震次生地质灾害危险性评价.地质力学学报,12(2):127—131
建,白世彪,陈晔.2004.Surfer8地理信息制图.北京:中国地图出版社
赵小麟,陈社发.1994.岷山隆起的构造地貌学研究.地震地质,16(4):429—439
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