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Position: Home > Articles > Effects of Slope Length on Detachment and Transport Processes on a Loessial Hillslope Bulletin of Soil and Water Conservation 2008,28 (3) 1-4

黄土坡面坡长对侵蚀一搬运过程的影响研究

作  者：
汪晓勇;郑粉莉
单  位：
西北农林科技大学资源环境学院
关键词：
坡长;侵蚀过程;泥沙搬运;模拟降雨
摘  要：
通过不同降雨强度的模拟降雨试验,研究了15°时坡面坡长对黄土坡面侵蚀—搬运过程的影响。结果表明,坡面径流量随坡长的增加而增加,在50和75 mm/h降雨强度下,坡面径流量随坡长增加的幅度基本相同。在100 mm/h降雨强度下,当坡长小于5 m时,坡面径流量随坡长的增加幅度较小,而当坡长大于5 m时,坡面径流量随坡长增加的速率明显增大。在8 m坡长内,坡面侵蚀量随坡长变化呈波状起伏的交替变化;随坡长增加,坡面侵蚀现象呈现以侵蚀—搬运过程为主与以侵蚀—沉积过程为主的交替现象。
译  名：
Effects of Slope Length on Detachment and Transport Processes on a Loessial Hillslope
作  者：
WANG Xiao-yong1,2,ZHENG Fen-li1,2 (1.College of Resources and Environment Science,Northwest A & F University,Yangling,Shaanxi 712100,China;2.State Key Laboratory of Soil Erosion and Dry Land Farming on the Loess Plateau,Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources, Yangling,Shaanxi 712100,China)
关键词：
slope length;erosion process;sediment transport;simulated rainfall
摘  要：
Effects of slope length on detachment and transport processes on a 15° loessial hillslope were quantitatively studied by using simulated rainfall of different intensities.Results showed that runoff discharge increased with an increase in slope gradient.At the 50 and 75 mm/h rainfall intensities,the increment of runoff discharge with an increase in slope length was approximately the same.At the 100 mm/h rainfall intensity,the increment of runoff discharge decreased for the < 5 m slope length,but for the >5 m slope length,runoff discharge remarkably increased with an increase in slope length.Sediment yield was fluctuated obviously for the 8 m slope length.Sediment regime was characterized by an alternation of detachment-transport dominated and detachment-deposition dominated.

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