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基于北京一号小卫星遥感影像,提取地震受灾严重区域(简称重灾区)崩塌与滑坡体的空间分布信息;以缓冲区空间分析技术,分析不同距离缓冲区段内崩塌与滑坡体的面积、个数、体积、等级大小、分布密度等指标,得出崩塌与滑坡体与4级以上余震集中带及5级以上震源之间的空间关系。结果表明:在不同距离的余震集中带缓冲区段内,崩塌与滑坡体面积在10~30 km缓冲区段内分布最多,而崩塌与滑坡体个数、体积、分布密度均以5 km缓冲区段内为最大;在不同距离的5级以上震源缓冲区内,崩塌与滑坡体面积、个数均以10~30 km缓冲区段内分布最多,而崩塌与滑坡体分布密度均以5 km缓冲区段内为最大;30 km缓冲区为崩塌与滑坡体的高发区,该区的面积仅占调查面积的10%左右,但崩塌与滑坡体面积达到崩塌与滑坡体总面积的60%,个数和体积均占总数的80%以上;不同距离缓冲区段内,崩塌与滑坡体个数多以1~5 hm2范围内的为最多,其次为小于1 hm2的。
Based on the satellite imagery of Beijing No. 1 satellite, the spatial distribution information of landslides and landslides in the severely affected areas of the earthquake were extracted. With the spatial analysis of buffer zone, the area of landslides and landslides in different distance buffer sections was analyzed. Number, volume, grade size, distribution density and other indicators, obtained spatial relationship between collapse and landslide bodies and aftershock concentration above Grade 4 and source above Grade 5. The results show that the collapse and landslide bodies distribute most within the buffer zone of 10-30 km in the aftershock concentration zone with different distances, and the number, volume and distribution density of collapse and landslide are all within 5 km buffer zone In the buffer zone above the magnitude 5 in different distances, the area and number of landslides and landslides are all distributed in the buffer zone of 10 ~ 30 km, while the distribution density of collapse and landslide body is 5 km The 30 km buffer zone is the high incidence area of landslide and collapse. The area of this zone is only about 10% of the surveyed area, but the area of collapse and landslide reaches 60% of the total area of landslide and landslide Number and volume all accounted for more than 80% of the total. Within the buffer zone with different distances, the number of landslides and landslides was mostly in the range of 1-5 hm2, followed by less than 1 hm2.