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Comparison of the Spatial Wind Erosion Patterns of Erosion Risk Mapping and Quantitative Modeling in Eastern Austria
Land ( IF 3.2 ) Pub Date : 2021-09-16 , DOI: 10.3390/land10090974
Simon Scheper , Thomas Weninger , Barbara Kitzler , Lenka Lackóová , Wim Cornelis , Peter Strauss , Kerstin Michel

Various large-scale risk maps show that the eastern part of Austria, in particular the Pannonian Basin, is one of the regions in Europe most vulnerable to wind erosion. However, comprehensive assessments of the severity and the extent of wind erosion risk are still lacking for this region. This study aimed to prove the results of large-scale maps by developing high-resolution maps of wind erosion risk for the target area. For this, we applied a qualitative soil erosion assessment (DIN 19706) with lower data requirements and a more data-demanding revised wind erosion equation (RWEQ) within a GIS application to evaluate the process of assessing wind erosion risk. Both models defined similar risk areas, although the assignment of severity classes differed. Most agricultural fields in the study area were classified as not at risk to wind erosion (DIN 19706), whereas the mean annual soil loss rate modeled by RWEQ was 3.7 t ha−1 yr−1. August was the month with the highest modeled soil loss (average of 0.49 t ha−1 month−1), due to a low percentage of vegetation cover and a relatively high weather factor combining wind speed and soil moisture effects. Based on the results, DIN 19706 is suitable for a general classification of wind erosion-prone areas, while RWEQ can derive additional information such as seasonal distribution and soil loss rates besides the spatial extents of wind erosion.

中文翻译:

奥地利东部侵蚀风险图和定量建模的空间风蚀模式比较

各种大型风险地图显示,奥地利东部,尤其是潘诺尼亚盆地,是欧洲最易受风蚀影响的地区之一。然而,对该地区风蚀风险的严重程度和程度仍缺乏综合评估。本研究旨在通过开发目标区域风蚀风险的高分辨率地图来证明大比例尺地图的结果。为此,我们在 GIS 应用程序中应用了具有较低数据要求的定性土壤侵蚀评估 (DIN 19706) 和对数据要求更高的修订风蚀方程 (RWEQ),以评估风蚀风险评估过程。两个模型定义了相似的风险区域,尽管严重性等级的分配不同。-1-1 . 8 月是模拟土壤流失量最高的月份(平均 0.49 t ha -1-1),这是由于植被覆盖率较低,以及结合风速和土壤水分影响的相对较高的天气因素。根据结果​​,DIN 19706 适用于风蚀易发地区的一般分类,而 RWEQ 可以得出除风蚀的空间范围外的其他信息,如季节性分布和土壤流失率。
更新日期:2021-09-16
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