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| 坡面薄层水流分离土壤的动力学机理 | |
| 引用本文： | 唐科明,张光辉,任宗萍,汪邦稳.坡面薄层水流分离土壤的动力学机理[J].水土保持学报,2011,25(4):46-49. |
| 作者姓名： | 唐科明 张光辉 任宗萍 汪邦稳 |
| 作者单位： | 1. 北京师范大学地理学与遥感科学学院,北京,100875 2. 北京师范大学地理学与遥感科学学院,北京100875／地表过程与资源生态国家重点实验室,北京100875 3. 北京师范大学地理学与遥感科学学院,北京100875／江西省水土保持科学研究所,江西南昌330029 |
| 基金项目： | 北京师范大学自主科研基金资助项目“土壤侵蚀水动力学机理研究”(2009SD-6) |
| 摘 要： | 为探讨土壤分离过程的水动力机理及植被根系对土壤分离的抑制作用,采用变坡实验水槽,系统研究坡度、流量及根系对土壤分离速率的定量影响。结果表明,土壤分离速率是坡度、流量及根系密度的函数;植被根系能显著降低土壤分离速率,草地土壤分离速率均值仅为休闲对照地的30.6%;随根系密度增加,土壤分离速率呈指数关系下降;0～4 kg/m^3为根系减少土壤分离的有效密度区间,在此范围内,根系密度的增加能引起土壤分离速率的急剧降低,超过4 kg/m^3,随根系密度增加,土壤分离速率的降幅并不明显。 |
| 关 键 词： | 土壤侵蚀 土壤分离 根系 柳枝稷 |
Dynamic Mechanism of Soil Detachment by Shallow Flow on Slope |
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| TANG Ke-ming,ZHANG Guang-hui,REN Zong-ping,WANG Bang-wen.Dynamic Mechanism of Soil Detachment by Shallow Flow on Slope[J].Journal of Soil and Water Conservation,2011,25(4):46-49. | |
| Authors: | TANG Ke-ming ZHANG Guang-hui REN Zong-ping WANG Bang-wen |
| Institution: | TANG Ke-ming1,ZHANG Guang-hui1,2,REN Zong-ping1,WANG Bang-wen1,3(1.School of Geography,Beijing Normal University,Beijing 100875,2.State Key Laboratory of Earth Surface Processes and Resource Ecology,3.Jiangxi Provincial Research Institute for Soil and Water Conversation,Nanchang,Jiangxi 330029) |
| Abstract: | This study was conducted to investigate the hydro-dynamic mechanism of soil detachment and the erosion-reducing effects of grass root.Soil detachment rate was measured using a laboratory flume to study the relationships between it and slope gradient,flow discharge,and grass root.The experimental results indicated that soil detachment rate could be predicted accurately using slope gradient,flow discharge,and root density.The mean value of root-permeated soil detachment rate(switch grass) accounted for 30.6% ... |
| Keywords: | soil erosion soil detachment grass root switch grass |
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