摘要
通过人工模拟降雨试验，研究了有无壤中流情况下红壤坡面侵蚀、入渗过程及含水量分布状况．结果表明：初始产流时间无壤中流比有壤中流约快13min，壤中流滞后于地表径流．产流强度无壤中流整体小于有壤中流，壤中流小于地表径流；有壤中流产沙量除峰值外其余都小于无壤中流．地表初渗速率无壤中流大于有壤中流，且入渗时间长；含水量无壤中流0～5cm随坡深逐渐减小，5～25cm随坡深逐渐增加，有壤中流0～10cm随坡深逐渐减小，10～25cm随坡深逐渐增加．无壤中流5cm以下各个坡深处的含水量大于有壤中流；两种情况含水量都属弱变异，有壤中流的变异幅度大于无壤中流，较大变异集中在15～30cm．
Slope erosion, infiltration process and water content distribution were studied for red soils artificial simulated rainfall experiments in indoors. The results showed that the initial runoff-yielding time without interflow was faster about 13 min than with interflow. Interflow legged behind surface runoff on the whole process. Runoff intensity of no interflow condition was lower than that of interflow condition. Interflow runoff intensity was lower than surface runoff intensity. Sediment yields without interflow condition were lower than with interflow except peaking values. The surface initial infiltration rate and infiltration time without interflow condition were higher than with interflow. Water content gradually decreased in 0 - 5 cm depth, and increased in 5 - 25 cm depth for without interflow condition and decreased in 0- 10 cm depth and increased 10 - 25 cm depth with interflow condition. The water contents below 5 cm depth for without interflow condition were higher than those with interflow condition. Water content changes under both conditions were weak variation and larger in 15 - 30 cm depth.
出处
《湖南师范大学自然科学学报》
CAS
北大核心
2013年第5期81-85,共5页
Journal of Natural Science of Hunan Normal University
基金
国家自然科学基金资助项目(40801083
40801107)
湖南省"十二五"重点学科建设资助项目(地理学)
关键词
红壤坡面
壤中流
入渗
产沙
产流
red soil land-slope
subsurface runoff
infiltration
sediment yield
runoff
