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降雨条件下不同土壤类型的坡面径流侵蚀产沙试验研究 预览

Experimental study on runoff erosion sediment from slopes of different types of soils under rainfall condition
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摘要 利用人工模拟降雨试验,研究我国最具代表的4种侵蚀性土壤,即红壤、紫色土、黑土和黄土,降雨雨强和坡度对坡面径流侵蚀产沙的影响以及坡面径流与侵蚀产沙的相关性,结果表明,4种土壤的坡面平均产沙强度均随降雨雨强和坡度的增大而增大,其抗侵蚀能力大小依次为紫色土、红壤、黑土和黄土;对人工模拟降雨试验坡面平均产沙强度进行二因素方差分析,计算所得的P值均小于0.05,说明降雨雨强和坡度对坡面侵蚀产沙强度的影响显著;分析4种土壤坡面侵蚀产沙与径流的关系,得出坡面产沙强度随径流强度的增大而增大,且两者之间存在较好的幂函数关系。 We research the effect of rainfall intensity and gradient on runoff erosion sediment from slopes of different types of soils( red soil,purple soil,black soil and yellow soil),and the correlation between slope runoff and erosion sediment. The result suggests that the average sediment yield from the slopes of four types of soils increases with the increase of railfall intensity and gradient. Judging from the erosion sediment of slope,the purple soil is the least eroded,followed by red sol,black soil and yellow soil. Through two-way variance analysis of average erosion sediment intensity from slopes based on artificial rainfall simuation experiment,we obtain P value of 0. 05 after calculation,which indicates the rainfall intensity and gradient have obvious influence on erosion sediment yield intensity. After analyzing the relation between erosion sediment from the slope of four types of soils and runoff,we come to the conclusion that the sediment yield intensity increases with the increase of runoff intensity,and that there is a good power function relation between them.
作者 黄旭华 孔琼菊 黄丽丽 HUANG Xuhua, KONG Qiongju, HUANG Lili (Jiangxi Institute of Hydraulic Research, Nanchang 330029, China)
出处 《南昌工程学院学报》 CAS 2017年第4期45-47,53共4页 Journal of Nanchang Institute of Technology
关键词 产沙 雨强 侵蚀 坡度 sediment yield rainfall intensity erosion gradient
作者简介 黄旭华(1990-),男,硕士,工程师,1042917284@qq.com.
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