| 上方来水来沙对细沟侵蚀产沙过程的影响 |
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| 引用本文： | 肖培青,郑粉莉. 上方来水来沙对细沟侵蚀产沙过程的影响[J]. 水土保持通报, 2001, 21(1): 23-25,38 |
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| 作者姓名： | 肖培青 郑粉莉 |
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| 作者单位： | 西北大学城市与资源学 系, |
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| 基金项目： | 国家自然科学基金(49671051， 40071058) |
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| 摘 要： | 利用双土槽系统径流小区 (供沙土槽和试验土槽 ) ,定量研究了不同上方来水含沙量和不同降雨强度下 15°坡面上方来水来沙对坡下方细沟侵蚀产沙过程的影响。结果表明 ,坡上方来沙量不但被径流全部搬运 ,且坡上方来水在坡下方细沟侵蚀槽引起另外的侵蚀产沙量 S。坡面细沟侵蚀过程以侵蚀—搬运过程为主。上方来水对细沟侵蚀产沙的贡献受上方来水含沙量和降雨强度的影响。降雨强度的增加或上方来水含沙量的减少 ,使 S值的增加更为显著
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| 关 键 词： | 上方来水来沙 细沟侵蚀产沙 双土槽 |
| 文章编号： | 1000—288X(2001)01—0023—03 |
| 收稿时间： | 2001-02-01 |
Effect of Run}n Water and Sediment on Ril 1 Erosion Process at Down-slope Section |
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| XIAO Pei qing and ZHEN Fen li. Effect of Run}n Water and Sediment on Ril 1 Erosion Process at Down-slope Section[J]. Bulletin of Soil and Water Conservation, 2001, 21(1): 23-25,38 |
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| Authors: | XIAO Pei qing and ZHEN Fen li |
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| Affiliation: | College of Southeast Land Manage ment, Zhejiang University, Hangzhou 310029, Zhejiang Province, PRC |
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| Abstract: | A dual box system (one is rill box and the other is feeder box) with 15 gradient and clay loess is used to quantify effects of runoff and sediment from up slope on down slope rill erosion and sediment under different sediment concentrations and rainfall intensities. The experiment results showed that the sediment from up slope was completely transported, runoff from up slope caused the additional sediment delivery at down slope rill erosion channel. Sediment regime in rill erosion process was always detachment-transport. The additional sediment delivery caused by up slope runoff increased with a decrease of sediment concentration in up slope runoff or an increase of rainfall intensity. |
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| Keywords: | run on water and sediment rill erosion and sediment dual box |
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