| 施加聚丙烯酰胺后坡长对侵蚀产沙过程的影响 |
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| 引用本文： | 刘纪根,雷廷武,蔡强国. 施加聚丙烯酰胺后坡长对侵蚀产沙过程的影响[J]. 水利学报, 2004, 35(1): 0057-0061 |
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| 作者姓名： | 刘纪根 雷廷武 蔡强国 |
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| 作者单位： | 1. 中国科学院,地理科学与资源研究所,北京,100101
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： | 引进国外杰出人才资金项目(982602)，国家自然科学基金资助项目(40171062) |
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| 摘 要： | 坡长是影响坡面径流和水流侵蚀产沙的重要地貌因素之一。本研究通过一系列人工模拟降雨，研究了在不同条件下坡长对侵蚀产沙过程的影响。试验中测取了3种雨强（50mm/h、100mm/h、150mm/h）、4种坡度（5°、10°、20°、25°）、4种当量坡长（8m、16m、24m、40m）和5种地表处理（对照、麦草覆盖和3种聚丙烯酰胺覆盖度）的产流和产沙量。试验结果表明，不同的雨强、地表处理和坡度下，坡长对侵蚀产沙过程的影响也不同。
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| 关 键 词： | 坡长；侵蚀产沙；当量坡长；聚丙烯酰胺 |
| 文章编号： | 0559-9350(2004)01-0057-05 |
| 修稿时间： | 2002-06-04 |
Experimental study on impacts of slope length treated with polyacrymide on sediment yield |
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| LIU Ji gen. Experimental study on impacts of slope length treated with polyacrymide on sediment yield[J]. Journal of Hydraulic Engineering, 2004, 35(1): 0057-0061 |
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| Authors: | LIU Ji gen |
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| Affiliation: | Institute of Geographical Science and Natural Resources Research,CAS,Beijing 100101,China |
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| Abstract: | Slope length is one of the important geomorphologic factors affecting the surface runoff and sediment yield.The impacts of slope length on sediment yield under different conditions are experimentally studied by means of artificial rainfall simulation.The runoff and sediment concentration for 3 rain intensities, 4 slope gradients, 5 kinds of surface treatment and 3 levels of PAM coverage are to be measured.It is found that the impacts of slope length on sediment yield are related to rainfall intensity, surface treatment, slope gradient and PAM coverage level. |
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| Keywords: | slope length sediment yield equivalent slope length polyacrymide |
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