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Determining soil erosion by water using high resolution remotely-sensed data

机译：使用高分辨率遥感数据确定水土流失

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The Trzebnickie Hills located to the north of Wroclaw, Poland, are dominated by fertile loess soil formations which are highly susceptible to water erosion. Against this context, the aim of this study was to investigate the advantages and limitations of using satellite imagery in the assessment of water erosion of loess soils. More specifically, the work focused on the interferometric analysis of high resolution SAR images from the TerraSAR-X satellite using coherence imagery. The results of this analysis were superimposed on a digital elevation model and slopes map to assess the relationship with coherence loss. Both visual interpretation and statistical analysis demonstrated that there may be correlation between local terrain slope angles and decreased correlation in coherence maps. Since slope is a major trigger of soil denudation, it was concluded that coherence maps can serve as a useful tool for extracting and delineating eroded areas. However, certain conditions must be met before the assessment of erosion from coherence maps can be considered credible and these are briefly discussed.
机译：位于波兰弗罗茨瓦夫北部的特热布尼克山（Trzebnickie Hills）以肥沃的黄土土壤形成为主，高度易受水蚀。在此背景下，本研究的目的是调查在利用黄土土壤水蚀评估中使用卫星图像的优势和局限性。更具体地说，这项工作着重于使用相干图像对来自TerraSAR-X卫星的高分辨率SAR图像进行干涉分析。分析结果叠加在数字高程模型和坡度图上，以评估与相干损失的关系。视觉解释和统计分析均表明，局部地形坡度角度之间可能存在相关性，而相干图中的相关性降低了。由于坡度是土壤剥蚀的主要诱因，因此可以得出结论，相干图可以作为提取和划定侵蚀区域的有用工具。但是，必须先满足某些条件，然后才能从相干图评估腐蚀，然后才对其进行简要讨论。

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