Multi-temporal analysis of erosional plots using aerial images and deep soil probes

IF 1.1 4区地球科学 Q4 ENVIRONMENTAL SCIENCES

Physical Geography Pub Date : 2021-02-11 DOI:10.1080/02723646.2021.1882074

P. Netopil, B. Šarapatka, Dawit Ayalew, Kateřina Drncová

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引用次数: 1

Abstract

ABSTRACT Evaluating erosion processes and their influence on soil degradation over extensive agricultural landscape is difficult. Because of the need for analysis and mapping of this problem, we elaborated a procedure applicable to a specific, intensively farmed, erosion-threatened chernozem area of CZ or similar regions. The aim of the research was to verify the possibility of digital aerial image analysis, along with a control study of soil sampling. To define and compare the boundaries and extent of erosion and deposition processes, we used images from two different years, showing changes in soil degradation. Orthorectification and unsupervised image classification were followed by interpretation and statistical evaluation. The results, locating erosional, transitional and depositional areas, were verified in laboratory analysis of soil samples for selected soil characteristics. Comparison of aerial images showed changes in the agricultural landscape over 35 years, showing an increase of ca. 60% in erosional areas. Extensive changes also occurred in transitional and depositional areas as material from the subsoil horizon of erosional areas covered some depositional areas. Importantly, our research confirmed the potential of digital aerial image analysis as a method of studying soil erosion over extensive landscape, and the possibility of using it in planning anti-erosion measures. GA

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利用航空影像和深层土壤探针对侵蚀地块进行多时相分析

在粗放型农业景观中评估侵蚀过程及其对土壤退化的影响是很困难的。由于需要对这一问题进行分析和绘图，我们制定了一个适用于CZ或类似地区特定的、集约化耕作、受侵蚀威胁的黑钙土地区的程序。研究的目的是验证数字航空图像分析的可能性，以及土壤采样的对照研究。为了定义和比较侵蚀和沉积过程的边界和程度，我们使用了两个不同年份的图像，显示了土壤退化的变化。正校正和无监督图像分类后进行判读和统计评价。结果，确定侵蚀区，过渡区和沉积区，并在选定土壤特征的土壤样品的实验室分析中得到验证。航空影像的对比显示了35年来农业景观的变化，显示侵蚀区增加了约60%。过渡区和沉积区也发生了广泛的变化，因为侵蚀区地下层位的物质覆盖了一些沉积区。重要的是，我们的研究证实了数字航空图像分析作为研究大面积景观土壤侵蚀的一种方法的潜力，以及将其用于规划抗侵蚀措施的可能性。遗传算法

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来源期刊

Physical Geography 地学-地球科学综合

CiteScore

3.60

自引率

0.00%

发文量

审稿时长

6 months

期刊介绍： Physical Geography disseminates significant research in the environmental sciences, including research that integrates environmental processes and human activities. It publishes original papers devoted to research in climatology, geomorphology, hydrology, biogeography, soil science, human-environment interactions, and research methods in physical geography, and welcomes original contributions on topics at the intersection of two or more of these categories.