ALOS/PALSAR full polarimetric observations of the Iwate–Miyagi Nairiku earthquake of 2008
ALOS/PALSAR full polarimetric observations of the Iwate–Miyagi Nairiku earthquake of 2008
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DOI：
10.1080/01431161.2011.554453
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发表时间：
2012-02
影响因子：
3.4
通讯作者：
Manabu Watanabe;C. Yonezawa;J. Iisaka;Motoyuki Sato
中科院分区：
文献类型：
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作者：
Manabu Watanabe;C. Yonezawa;J. Iisaka;Motoyuki Sato
我们分析了 2008 年日本岩手宫城内陆地震受损地区的先进陆地观测卫星 (ALOS) 相控阵型 L 波段合成孔径雷达 (PALSAR) 数据。地震前后的观测是在全极化模式下进行的。我们观察了滑坡区域中三分量散射模型的表面散射的主导地位，并识别了 13 个滑坡区域中的 11 个。然而，我们也发现了空置的土地、牧场和其他土地。估计了102个斑块区域的可能滑坡区域，其中36个对应于实际滑坡区域。当有灾害发生前拍摄的土地分类图或光学图像时，该方法可用于检测滑坡区域。我们建议使用 σ0 VH 信息来区分滑坡区域和其他区域。由于σ0 VH 对区域的表面粗糙度敏感，因此可以将表面粗糙度相对较低的空地和牧场与表面粗糙度较高的滑坡区域区分开来。通过结合表面散射和σ0 VH滤波器，可能的滑坡区域数量从102个减少到54个，其中包括除一些小斑块区域之外的实际滑坡区域。
We analysed Advanced Land Observing Satellite (ALOS) Phased Array type L-band Synthetic Aperture Radar (PALSAR) data on the areas damaged by the Iwate–Miyagi Nairiku earthquake that struck Japan in 2008. The observations before and after the earthquake have been carried out in the full polarimetric mode. We observed the dominance of surface scattering of the three-component scattering model in the landslide areas and identified 11 of the 13 landslide areas. However, we also detected vacant pieces of land, pastures and other land bodies. The possible landslide areas are estimated for 102 patch areas, of which 36 correspond to the actual landslide areas. This method is useful to detect the landslide area when the land classification map or optical image taken before a disaster is available. We propose the use of σ0 VH information to distinguish the landslide areas from the other areas. Since σ0 VH is sensitive to the surface roughness of an area, vacant pieces of land and pastures, which have a relatively low surface roughness, can be distinguished from the landslide areas, which have a high surface roughness. By combining the surface scattering and the σ0 VH filter, the number of possible landslide areas is reduced from 102 to 54, which include the actual landslide areas except for some small patch areas.