Quantification of particle detachment by rain splash and wind-driven rain splash
Quantification of particle detachment by rain splash and wind-driven rain splash
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DOI：
10.1016/j.catena.2014.12.023
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发表时间：
2015-04-01
期刊：
影响因子：
6.2
通讯作者：
Ries, Johannes B.
中科院分区：
文献类型：
--
作者：
Marzen, Miriam;Iserloh, Thomas;Ries, Johannes B.
撞击表面的雨滴将其部分动能转移到表面，从而破坏聚集体并移动土壤颗粒。间沟过程的强度很大程度上取决于降雨的强度和动能。风会改变下落雨滴的所有与侵蚀相关的特征，例如速度、冲击角度和动能。它还可能捕获并拖动空气中的土壤颗粒。为了量化有风影响和没有风影响的雨滴侵蚀量，开发并应用了便携式风雨模拟器中的实验设置。无粘性沙质基质的结果表明，风显着增加了雨滴侵蚀：1．剥离基材的平均量增加了 50.2 倍。覆盖距离更大。3．飞溅蠕变过程加剧。该研究强调了风雨对土壤侵蚀的潜在非常强烈的影响。飞溅和飞溅盐化的评估是全面了解和现实评估区域和全球土壤侵蚀速率及其在土壤侵蚀模型中应用的重要一步。 (C) 2014 Elsevier B.V. 保留所有权利。
A surface-hitting raindrop transfers a part of its kinetic energy onto the surface and thereby destroys aggregates and moves soil particles. The magnitude of interrill processes is largely determined by the intensity and kinetic energy of rainfall.Wind alters all erosion-relevant characteristics of a falling raindrop such as velocity, impact angle and kinetic energy. It also might capture and drag an airborne soil particle. To quantify the amount of raindrop erosion with and without the influence of wind, an experimental setting within the Portable Wind and Rainfall Simulator was developed and applied. The results on cohesionless sandy substrate suggest that wind considerably increases raindrop-erosion:1. The mean amount of detached substrate is increased by the factor 50.2. The covered distance is greater.3. The process splash-creep is intensified.The study highlights a potentially very strong impact of wind-driven rain on soil erosion. The evaluation of splash and splash-saltation is one important step towards the general understanding and realistic assessment of regional and global soil erosion rates and application in soil erosion models. (C) 2014 Elsevier B.V. All rights reserved.