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首页> 外文期刊>Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group >A process-based conversion model for caesium-137 derived erosion rates on agricultural land: an integrated spatial approach
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A process-based conversion model for caesium-137 derived erosion rates on agricultural land: an integrated spatial approach

机译：基于过程的铯137农田侵蚀速率转换模型：综合空间方法

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摘要

There is increasing recognition that ~(137)Cs data remain one of the few sources of spatially distributed information concerning soil erosion. However, many of the conversion models that have been used to convert ~(137)Cs data into soil redistribution rates failed to account for some of the key factors affecting the redistribution of ~(137)Cs in agricultural landscapes. The therefore to provide more realistic estimates of soil erosion rates on agricultural land. The conversion model aims at coupling soil redistribution processes directly with ~(137)Cs redistribution. Emphasis is placed on the spatial representation of soil redistribution processes and the adequate simulation of tillage processes. The benefits of the presented model arise from the two-dimensional spatial integration of mass balance models with soil erosion models. No a priori assumptions about the intensity of any soil redistribution process are necessary and the level of agreement between observed and simnulated ~(137)Cs inventories enables us to evaluate the performance of the model. The spatial implementation and the use of fuzzy parameter sets also allow us to assess the uncertainties associated with soil erosion estimates. It was shown estimates of soil redistribution. The model was successfully applied to study site in the Belgian Loam Belt and the results indicated that tillage is the dominant process. Furthermore, the uncertainties associated with the estimation of water erosion rates were much higher than those associated with tillage, especially for depositional areas.
机译：人们越来越认识到，〜（137）Cs数据仍然是有关土壤侵蚀的空间分布信息的少数来源之一。但是，许多用于将〜（137）Cs数据转换为土壤再分配率的转换模型未能说明影响农业景观中〜（137）Cs重新分配的一些关键因素。因此，可以对农业土地上的土壤侵蚀率提供更现实的估计。转换模型旨在将土壤重新分配过程与〜（137）Cs重新分配直接耦合。重点放在土壤再分配过程的空间表示和耕作过程的适当模拟上。提出的模型的好处来自质量平衡模型和土壤侵蚀模型的二维空间整合。无需对任何土壤再分配过程的强度进行先验假设，而且观测到的和模拟的〜（137）Cs清单之间的一致性水平使我们能够评估模型的性能。空间上的实现和模糊参数集的使用还使我们能够评估与土壤侵蚀估算有关的不确定性。显示了对土壤重新分布的估计。该模型已成功地应用于比利时壤土带的研究现场，结果表明耕作是主要过程。此外，与水蚀速率估算相关的不确定性远高于与耕作相关的不确定性，尤其是对于沉积地区。

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