利用雷达偏振法监测滑坡带后向散射机制的变化,以布里亚河河岸崩塌为例

V. Bondur, В Г Бондур, T. Chimitdorzhiev, Тумэн Намжилович Чимитдоржиев, A. Dmitriev, Алексей Дмитриев, P. Dagurov, П. Н. Дагуров, A. Zakharov, А И Захаров, L. Zakharova, Л Н Захарова
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引用次数: 0

摘要

分析了雷达偏振法识别滑坡带的可能性。利用反射面对优势散射类型的转换作为滑坡带的一个关键特征。ALOS-2 PALSAR-2极化数据采用Freeman-Durden分解和cloud - pottier分解对布里亚河岸崩塌引起的滑坡区域选定的四个试验点进行处理。分解结果总体上是一致的,但由于基本模型规定的特殊性,部分区域存在显著差异。结果表明,滑坡发生前,滑坡区雷达信号的散射机制主要有三种:表面散射、体积散射和双重散射。崩塌后,该区域的特征是地表单一散射,大面积不规则,没有植被。因此,可以自信地识别滑坡区域。利用雷达偏振法对滑坡现象的影响进行远程诊断的巨大潜力已被证明。
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Using radar polarimetry to monitor changes in backscattering mechanisms in landslide zones for the case study of the Bureya river bank collapse
The possibilities of radar polarimetry methods for identification of landslide zones are analyzed here. The fact of transformation of the dominant scattering type by the reflecting surface was used as a key feature of the landslide zone. ALOS-2 PALSAR-2 polarimetric data were processed using the Freeman–Durden and Cloude–Pottier decompositions for the four test sites selected in the area of a landslide caused by the Bureya river bank collapse. The decomposition results are consistent with each other in general, however, some areas show significant differences due to the specifics of the basic model provisions. It is shown that before the landslide event on the landslide area there were three main mechanisms of radar signal scattering: surface, volume, and double scattering. After the collapse, this area is characterized by a single scattering from the surface with large-scale irregularities and without vegetation. So, the landslide area can be confidently recognized. The considerable potential of using the radar polarimetry method for remote diagnostics of the effects of landslide phenomena has been demonstrated.
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