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.

摘要

评估侵蚀过程及其对广泛农业景观土壤退化的影响是困难的。由于需要对这个问题进行分析和绘图，我们制定了适用于特定的、集约化耕作、受侵蚀威胁的 CZ 或类似地区的黑钙矿区域的程序。该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范围，我们使用了两个不同年份的图像，显​​示了土壤退化的变化。正射校正和无监督图像分类之后是解释和统计评估。结果，定位侵蚀，过渡和沉积区域，在对选定的土壤特征进行土壤样品的实验室分析中进行了验证。航拍图像的比较显示了 35 年来农业景观的变化，显示出大约增加了 35 年。60%在侵蚀区。由于侵蚀区底土层位的物质覆盖了部分沉积区，过渡区和沉积区也发生了广泛的变化。重要的是，我们的研究证实了数字航拍图像分析作为研究广泛景观土壤侵蚀的方法的潜力，以及将其用于规划抗侵蚀措施的可能性。由于侵蚀区底土层位的物质覆盖了部分沉积区，过渡区和沉积区也发生了广泛的变化。重要的是，我们的研究证实了数字航拍图像分析作为研究广泛景观土壤侵蚀的方法的潜力，以及将其用于规划抗侵蚀措施的可能性。由于侵蚀区底土层位的物质覆盖了部分沉积区，过渡区和沉积区也发生了广泛的变化。重要的是，我们的研究证实了数字航拍图像分析作为研究广泛景观土壤侵蚀的方法的潜力，以及将其用于规划抗侵蚀措施的可能性。