论文部分内容阅读
在发生破坏性地震之后,及时地获取人口聚集区的震害状况,对灾后救援工作有着十分重要的意义。利用合成孔径雷达差分干涉测量技术,可以快速、大范围地获取震区的地表形变。然而,如何基于同震形变精确地获取人口聚集区的地震烈度,进而为震后救援提供及时准确的灾情信息,还是一项有待研究的科研难题。本文以2010年4月14日青海玉树7.1级地震为例,利用人口聚集区的同震形变开展了地震烈度的评估。结果表明,利用差分干涉测量技术获取的地震同震形变,可以初步地评估人口聚集区地震烈度的分布状况。经过与实地调查烈度对比验证,评估精度达到74%左右,这表明基于地震形变的烈度评估结果与震后调查公布的结果有较高的一致性。地表形变资料对于地震烈度的早期评估、震区受灾状况的快速认识具有着重要的参考价值。
After the occurrence of devastating earthquakes, timely access to the earthquake damage situation in the population concentration area is of great significance to the relief work after the disaster. Synthetic Aperture Radar Differential Interferometry can acquire the surface deformation of the earthquake area quickly and extensively. However, how to accurately obtain the seismic intensity of the population concentration area based on coseismic deformation and then provide the timely and accurate disaster information for the post-earthquake rescue is still a difficult problem to be studied. Taking the 7.1 Yushu earthquake in Qinghai Province on April 14, 2010 as an example, this paper uses the coseismic deformation of the population concentration area to carry out an earthquake intensity assessment. The results show that the distribution of seismic intensity in the population concentration area can be preliminarily evaluated by the seismic coseismic deformation acquired by the differential interferometry technique. After comparing with the intensity of field survey, the accuracy of the assessment is about 74%, which shows that the results of seismic intensity-based seismic intensity assessment and post-earthquake survey have a higher consistency. The data of surface deformation have an important reference value for the early assessment of seismic intensity and the rapid recognition of the earthquake-affected area.