Heavy rainfall-induced landslide detection from very high resolution multi-aspect TerraSAR-X images in Dessie, Ethiopia
Heavy rainfall-induced landslide detection from very high resolution multi-aspect TerraSAR-X images in Dessie, Ethiopia
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利用埃塞俄比亚 Dessie 的超高分辨率多方位 TerraSAR-X 图像检测暴雨引发的山体滑坡
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发表时间：
2012
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影响因子：
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通讯作者：
L. Ayalew
中科院分区：
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作者：
F. Beyene;W. Busch;Steffen Knospe;L. Ayalew
在埃塞俄比亚靠近裂谷峭壁和高地的城镇，滑坡的影响是巨大的，特别是在雨季。为了在现有雷达技术的支持下研究这些地区边坡失稳的季节变化和趋势，从德国航空航天局（DLR）获取了40张TerraSAR-X/TanDEM-X （TSX/TDX）雷达图像。采用常规的2次DInSAR方法对SAR数据进行处理，将上升轨道和下降轨道的11和22 d干涉图叠加得到的DInSAR时间序列分析结果表明，在雨季有2-3 cm的质量运动或变形，在旱季有1-2 cm的质量运动或变形。将DInSAR分析得到的结果与包含感兴趣地区20多个活动滑坡的滑坡清单图进行了比较，总体上观察到良好的一致性。
The impact of landslide is enormous in towns adjacent to the rift escarpments and highlands of Ethiopia, especially in rainy seasons. To study the seasonal variation and trend of slope instability in these areas with support of the current radar technology, 40 spotlight mode of TerraSAR-X/TanDEM-X (TSX/TDX) radar imageries were acquired from German Aerospace Agency (DLR). The conventional 2-pass DInSAR method has been applied to process the SAR data, and the DInSAR time series analysis result obtained by stacking 11 and 22 days interferograms from both ascending and descending orbits showed that there are 2-3 cm mass movements or deformation in the rainy season and 1-2 cm in the dry months. The results obtained from the DInSAR analysis were compared with a landslide inventory map containing more than 20 active landslides of the area of interest, and generally a good consistency was observed.