西北地震学报2011，Vol.33Issue(z1)：398-402,5.
汶川地震滑坡与影响因素
Influence Factors of the Landslides Caused by Wenchuan Earthquake
摘要
Abstract
According to remote sensing interpretation of huge and middle landslides in VII～XI intensities area which covers more than 30000 km2, different GIS layers are built with the influence factors such as earthquake intensity, strike of seismogenic fault etc. The relationship between earthquake landslides' distribution and influencing factors is analyzed. The landslides hazard analysis model based on the most approach degree method from GIS means is built. The results show that (1) the landslide's frequencies increase along with the increase of earthquake intensity, and the number of landslide with area of 10 000~100 000 m2 is biggest every intensity district; (2) the landslides mainly distributes in the place near to the seismogenic faults, however, the attenuation speeds are different in two directions, which is faster in perpendicular direction than in parallel direction to the seismogenic faults, (3) the landslides happen mainly on the slope with 25° ~ 40° , (4) the landslides are concentrated in 1.0-1.5 km in elevation, making up about 42% of total in the research area, (S) the landslides happen manly in direction of east, southeast and south making up about half total. The model built by the most approach degree method is applied to Wenchuan earthquake landslides to analyze the landslide hazard in the research area, and the result is basically in agreement with actual situation.关键词
地震滑坡/汶川地震/影响因素/最临近程度方法Key words
Earthquake landslides/Wenchuan earthquake/Influencing factor/Most approach degree method分类
天文与地球科学引用本文复制引用
侯景瑞,袁中夏..汶川地震滑坡与影响因素[J].西北地震学报,2011,33(z1):398-402,5.基金项目
甘肃省自然科学基金(1010RJZA010) （1010RJZA010）
中国地震局兰州地震研究所论著编号:LC2011037 （）
