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 onmulti-sourcemulti-temporal satellite data,whichwas 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 theBeiChuan-YingXiu fault zone as banded; amass of disasters develops in Silurian strata because of structural components; a mass of disasters affected by the topography developed in the terrain with slope of30°—70°.The distribution regularity ofdisasters can provide scientific foundation forprevention earthquake plans and reconstruction after earthquake.