| 粗糙元覆盖对土壤风蚀的控制作用 |
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| 引用本文： | 慕青松,廖江海,马崇武,苗天德.粗糙元覆盖对土壤风蚀的控制作用[J].土壤学报,2008,45(6):1026-1033. |
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| 作者姓名： | 慕青松 廖江海 马崇武 苗天德 |
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| 作者单位： | 1. 兰州大学土木工程与力学学院 兰州 730000
2. 东莞理工学院机电建筑工程系 广东东莞 523808 |
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| 基金项目： | 国家自然科学基金青年基金
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兰州大学骨干教师学科配套基金
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| 摘 要： | 应用湍流边界层中粗糙壁面的阻力分解规律研究土壤风蚀中的临界侵蚀风速、输沙率和风蚀率,建立了一个揭示地表粗糙元对土壤风蚀控制作用的理论模型。该模型给出了临界侵蚀风速与盖度之间的指数关系,临界侵蚀风速与农田茬高之间的指数关系,以及反映输沙率(或风蚀率)与盖度(或茬高)、风速之间依赖关系的理论公式。然后应用天然地表风蚀和农田风蚀的多家实验数据,对这些理论公式进行了广泛地检验和评价,发现具有很好的普适性。
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| 关 键 词： | 粗糙元 临界侵蚀风速 临界侵蚀盖度 输沙率 风蚀率 |
| 收稿时间： | 2007/7/13 0:00:00 |
| 修稿时间： | 2007/12/30 0:00:00 |
EFFECT OF ROUGH ELEMENTS ON SOIL EROSION |
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| Mu Qingsong,Liao Jianghai,Ma Chongwu and Miao Tiande.EFFECT OF ROUGH ELEMENTS ON SOIL EROSION[J].Acta Pedologica Sinica,2008,45(6):1026-1033. |
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| Authors: | Mu Qingsong Liao Jianghai Ma Chongwu and Miao Tiande |
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| Institution: | Mu Qingsong1 Liao Jianghai1 Ma Chongwu2 Miao Ti,e1(1 Department of Mechanics,School of Civil Engineering , Mechanics,Lanzhou University,Lanzhou 730000,China)(2 Department of Mechanical & Electronic Engineering,Dongguan University of Technology,Dongguan,Guangdong 523808,China) |
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| Abstract: | Based on the rule of wind friction decomposition on the rough wall in the turbulent boundary layer,threshold velocity of soil erosion,sand transport rate and wind erosion rate were studied to explore effect of roughness elements on soil wind erosion,and thus a soil erosion theory was derived,from which some theoretical results were developed that the exponential relation between threshold velocity and coverage,the exponential relation between threshold velocity and stubble height for farmlands after harvest... |
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| Keywords: | Rough elements Threshold velocity of soil erosion Threshold coverage of soil erosion Sand transport rate Wind erosion rate |
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