北川地震遗址震害建筑物遥感数字化保存与震害特征分析

2008年5月12日发生的Ms8.0级汶川大地震致使北川老县城满目疮痍从而搬迁重建。北川老县城是汶川地震中破坏最为严重,震害类型最为全面多样的震区,地震遗址完整得保留了地震后的原始景象,泥石流、滑坡、堰塞湖等次生灾害类型丰富,建筑物受损倒塌形式多样,具有极高地科研价值与历史价值。露天的地震遗址受其它自然灾害的影响易随时间逐渐消失,为使地震遗址得以永久的保存,收集整理了汶川地震后北川老县城地震遗址的光学遥感、合成孔径雷达、激光雷达等多种数字化形式的遥感图像,分析了不同类型图像在北川老县城地震建筑物遗址数字化保存应用中的作用,同时为最大可能的发挥地震遗址遥感影像中建筑物破坏类型多样的作用,从多类型影像分析的角度,基于遗址丰富的数据资源,研究分析了不同震害程度建筑物在多源遥感图像中的表现特征与成像机理,为后续震害信息提取与评估研究数据支撑与理论依据。

Analysis of Seismic Damage Characteristics and Digital Preservation of Remote Sensing Image of Beichuan Earthquake Site

The Ms8.0 Wenchuan earthquake occurred in May 12, 2008 devastated Beichuan country, which caused the relocation of the whole county to rebuild. The old town of Beichuan is the earthquakeSareas with the most serious damage and the most comprehensive and diverse types of earthquake disaster in the Wenchuan earthquake. The earthquake site integrallySpreserved the original post earthquake scene, the type of secondary disasters of debris flow, landslide, dammed lake were diversity and the forms of damage and collapse of buildings were various, which has a very high scientific and historical value. The earthquake site in the open air is affected by other natural disasters, which is easy to disappear with time, In order to keep the earthquake site permanent, and the role of various types of building damage in the remote sensing image of seismic site is played asSmuchSasSpossible. The author collected and sorted out the optical remote sensing, SAR, laser radar and other forms of digital image data of the earthquake site of Beichuan old town after earthquake, and analyzed the role in the digital preservation of the earthquake ruins.