水土保持学报2011，Vol.25Issue(2)：6-9,14,5.
室内模拟降雨条件下径流侵蚀产沙试验研究
Experimental Study on Law of Runoff-Erosion-Sediment Yield under Indoor Simulated Rainfall Condition
摘要
Abstract
Rainfall and runoff are the main dynamic factors which cause soil erosion on the Loess Plateau. Research on processes of rainfall, runoff and sediment yield can promote the development of soil erosion process-based model, and provide important scientific basis for soil and water conservation, and ecology construction on loess region. The rules of rainfall and runoff erosion, sediment yield, infiltration and the correlation among each other were studied under different vegetation patterns by using indoor simulated rainfall experiments. The results showed that rainfall intensity was the main factor affecting runoff generation, with a contribution ratio of runoff generation of 87 ％, while slope gradient was the main factor affecting sediment yield, with a contribution ratio of sediment yield of 76％, which were more obvious in strong rainfall or on steep slope. Under simulated rainfall condition, the moisture content on slope was in the following order:middle-lower slope＞middle slope＞upper slope. Vegetation coverage had more influence on runoff and sediment yield than slope gradient. Vegetation distributed in the lower slope conserved soil better than that in the upper and middle slopes under the same vegetation coverage condition. With the increase of vegetation coverage, runoff volume decreased within the power function distribution range, the total sediment yield and sediment concentration decrease within the exponential function distribution range, and the effectiveness of vegetation regulating on runoff and sediment yield were strengthened gradually. The results were significantly meaningful for understanding the rainfall and runoff erosion and sedimented yield process in watershed,and could provide reliable experimental support for related researches on soil erosion model.关键词
室内模拟降雨/植被格局/水蚀过程/调控机理Key words
indoor simulated rainfall/ vegetation pattern/ water erosion process/ regulating mechanism分类
农业科技引用本文复制引用
鲁克新,李占斌,张霞,于国强..室内模拟降雨条件下径流侵蚀产沙试验研究[J].水土保持学报,2011,25(2):6-9,14,5.基金项目
陕西省教育厅专项科研计划项目(09JK635) （09JK635）
国家重点基础研究发展计划项目(2007CB407206) （2007CB407206）
国家自然科学基金项目(40971161) （40971161）
