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Are compacted tramlines underestimated features in soil erosion modeling? A catchment-scale analysis using a process-based soil erosion model
Land Degradation & Development ( IF 4.7 ) Pub Date : 2021-12-01 , DOI: 10.1002/ldr.4161
Philipp Saggau 1 , Michael Kuhwald 1 , Wolfgang Berengar Hamer 1 , Rainer Duttmann 1
Affiliation  

Process-based model ling has long been used as a well-suited tool to simulate soil erosion. Despite a large number of scientific articles that emphasize the role of compacted tramlines for soil erosion and surficial nutrient transport, no study exists that integrates these artificial structures into process-based modelling at catchment scales. Thus, this study aims to quantify the effects of tramline compaction on soil erosion dynamics within a catchment. For this reason, high-resolution spatial data (1 × 1 m) have been incorporated into the model EROSION 3D, which was used, calibrated, and tested for a soil erosion event with measured discharge and soil loss data. To quantify the contribution of tramlines to soil erosion, two different model parameterizations have been used: the tramline parameterization (TLP) and the common model parameterization (CP) that disregards the tramlines. The results reveal that: (i) the parameterization of tramlines improved model outcomes; (ii) tramlines significantly contribute to overall soil loss and sediment entrance into the channel network; (iii) the bulk density of tramlines is the most important driver of increases in soil erosion and runoff. Moreover, our investigation suggests that the impact of compacted tramlines have long been underestimated in soil erosion modelling and can assist in the assessment of surficial flow path connectivity. Thus, the integration of tramlines into soil erosion modeling is important for the implementation of adequate soil conservation and water protection measures.

中文翻译:

压实的有轨电车线路是否低估了土壤侵蚀建模中的特征?使用基于过程的土壤侵蚀模型进行流域尺度分析

基于过程的建模长期以来一直被用作模拟土壤侵蚀的非常合适的工具。尽管有大量科学文章强调压实的有轨电车线路对土壤侵蚀和地表养分输送的作用,但尚无研究将这些人工结构整合到流域规模的基于过程的建模中。因此,本研究旨在量化有轨电车线路压实对流域内土壤侵蚀动态的影响。出于这个原因,高分辨率空间数据 (1 × 1 m) 已被纳入模型 EROSION 3D,该模型用于使用、校准和测试具有测量的排放和土壤流失数据的土壤侵蚀事件。为了量化有轨电车线路对土壤侵蚀的贡献,使用了两种不同的模型参数化:电车线路参数化(TLP)和不考虑电车线路的公共模型参数化(CP)。结果表明:(i)电车线路的参数化改善了模型结果;(ii) 有轨电车对整体土壤流失和泥沙进入渠道网络有很大影响;(iii) 有轨电车的体积密度是土壤侵蚀和径流增加的最重要驱动因素。此外,我们的调查表明,压实的有轨电车线路的影响长期以来在土壤侵蚀建模中被低估了,并且可以帮助评估地表水流路径的连通性。因此,将有轨电车线路整合到土壤侵蚀模型中对于实施适当的水土保持和水保护措施非常重要。(i) 电车线路的参数化改进了模型结果;(ii) 有轨电车对整体土壤流失和泥沙进入渠道网络有很大影响;(iii) 有轨电车的体积密度是土壤侵蚀和径流增加的最重要驱动因素。此外,我们的调查表明,压实的有轨电车线路的影响长期以来在土壤侵蚀建模中被低估了,并且可以帮助评估地表水流路径的连通性。因此,将有轨电车线路整合到土壤侵蚀模型中对于实施适当的水土保持和水保护措施非常重要。(i) 电车线路的参数化改进了模型结果;(ii) 有轨电车对整体土壤流失和泥沙进入渠道网络有很大影响;(iii) 有轨电车的体积密度是土壤侵蚀和径流增加的最重要驱动因素。此外,我们的调查表明,压实的有轨电车线路的影响长期以来在土壤侵蚀建模中被低估了,并且可以帮助评估地表水流路径的连通性。因此,将有轨电车线路整合到土壤侵蚀模型中对于实施适当的水土保持和水保护措施非常重要。(iii) 有轨电车的体积密度是土壤侵蚀和径流增加的最重要驱动因素。此外,我们的调查表明,压实的有轨电车线路的影响长期以来在土壤侵蚀建模中被低估了,并且可以帮助评估地表水流路径的连通性。因此,将有轨电车线路整合到土壤侵蚀模型中对于实施适当的水土保持和水保护措施非常重要。(iii) 有轨电车的体积密度是土壤侵蚀和径流增加的最重要驱动因素。此外,我们的调查表明,压实的有轨电车线路的影响长期以来在土壤侵蚀建模中被低估了,并且可以帮助评估地表水流路径的连通性。因此,将有轨电车线路整合到土壤侵蚀模型中对于实施适当的水土保持和水保护措施非常重要。
更新日期:2021-12-01
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