北川县地震次生滑坡空间分布特征研究

发布时间：2018-07-21 17:16

【摘要】：在已解译的遥感影像资料基础上,利用MAPGIS空间分析方法对汶川地震次生滑坡在北川县的空间分布特征进行研究.结果表明,由于断层效应、烈度效应、水系侵蚀作用、岩性控制作用等内外力因子的影响,在北川县境内,距发震断层4km范围区域、发震断层上盘区域、距水系1km的沿河两岸、Ⅺ级和X级地震烈度区、砂页岩分布区是五类地震次生滑坡的强发育区.将五类区域进行空间叠加,并据此对研究区进行地震滑坡危险性区划,可以看出,在发震断层上盘,汶川地震次生滑坡的高危区分布于沿断层4km范围内的整个区域及X级、Ⅺ烈度区内的沿河两岸地区;在发震断层下盘,高危区分布于沿断层4km范围内的沿河两岸地区.
[Abstract]:Based on the interpreted remote sensing image data, the spatial distribution characteristics of secondary landslide in Beichuan County of Wenchuan earthquake were studied by using MAPGIS spatial analysis method. The results show that due to the influence of internal and external force factors such as fault effect, intensity effect, water system erosion, lithology control and so on, in Beichuan County, it is located in Beichuan County, within the area of 4km from seismogenic fault, the upper face of seismogenic fault, and the banks along the river from 1km of water system. The distribution area of sand shale in earthquake intensity areas of magnitude XI and X is the strong development area of secondary landslides of five types of earthquakes. According to the space superposition of five types of areas and the division of seismic landslide risk in the study area, it can be seen that the high risk area of secondary landslide of Wenchuan earthquake is distributed in the whole area and X magnitude along the 4km range of fault in the upper face of earthquake generating fault. In the seismic fault footwall, the high risk area is located along the river banks within the range of fault 4km.
【作者单位】：绵阳师范学院资源环境工程学院;
【基金】：四川省教育厅自然科学基金资助项目(14ZB0265)
【分类号】：P642.22

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