| 黄土高原坡耕地泥沙输移特征分析 |
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| 引用本文： | 高军侠,党宏斌,程积民.黄土高原坡耕地泥沙输移特征分析[J].水土保持通报,2007,27(2):49-42. |
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| 作者姓名： | 高军侠 党宏斌 程积民 |
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| 作者单位： | 1. 郑州航空工业管理学院,环境工程实验室,河南,郑州,450015
2. 中国科学院,水利部,水土保持研究所,陕西,杨凌,712100 |
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| 基金项目： | 国家科技攻关项目;陕西省科技攻关计划 |
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| 摘 要： | 在野外利用人工模拟降雨试验,分析了20,40,60m坡长下的输沙率、含沙量及累积产沙量—径流量的变化特征。结果显示,当雨强小于2.0mm/min时,最大输沙率出现在40m坡长;而当雨强大于2.0mm/min时,最大输沙率出现在60m坡长。在试验雨强范围内,最大含沙量总是出现在20m坡长。累积产沙量—径流量随时间变化趋于平稳。试验结果表明,为遏制黄土高原坡耕地水土流失,实践中应采取垄作等措施增加坡面糙度和改变坡面形态,防止在20m坡长形成高含沙水流和后续坡长的输沙率。
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| 关 键 词： | 坡耕地 泥沙输移 输沙率 含沙量 |
| 文章编号： | 1000-288X(2007)02-0039-04 |
| 收稿时间： | 2006/11/10 0:00:00 |
| 修稿时间： | 11 10 2006 12:00AM |
Characteristic Analysis of Sediment Transport on Slope Land in the Loess Plateau |
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| Gao Junxi,Dang Hongbin and Cheng Jimin.Characteristic Analysis of Sediment Transport on Slope Land in the Loess Plateau[J].Bulletin of Soil and Water Conservation,2007,27(2):49-42. |
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| Authors: | Gao Junxi Dang Hongbin and Cheng Jimin |
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| Abstract: | The characteristics of sediment transport rate,sediment concentration and accumulative sediment-runoff in slope lengths of 20,40,60 m were analyzed based on field simulated rainfall experiments.Results showed that maximum sediment transport rate occurred in 40 m slope length at rainfall intensity less than 2 mm/min,while it occurred in 60 m slope length at rainfall intensity greater than 2 mm/min.Maximum sediment concentration was always observed in 20 m slope length in all the experiments.Accumulative sediment-runoff was prone to be steady with time.The study implies that the measures such as farming along contour,which increases the roughness value of slope and changes slope form,should be taken to reduce high sediment concentration and sediment transport rate,and thus control soil and water loss on loess slope. |
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| Keywords: | slope land sediment transport sediment transport rate sediment concentration |
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