北川縣地震次生滑坡空間分布特征研究
[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.
【作者單位】: 綿陽師范學(xué)院資源環(huán)境工程學(xué)院;
【基金】:四川省教育廳自然科學(xué)基金資助項(xiàng)目(14ZB0265)
【分類號(hào)】:P642.22
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