| 黄土坡面侵蚀产沙时空演变的REE示踪技术研究 |
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| 引用本文： | 薛亚洲,刘普灵,杨明义,琚彤军. 黄土坡面侵蚀产沙时空演变的REE示踪技术研究[J]. 水科学进展, 2005, 16(2): 174-180 |
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| 作者姓名： | 薛亚洲 刘普灵 杨明义 琚彤军 |
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| 作者单位： | 中国科学,院水利部,水土保持研究所土壤侵蚀与旱地农业国家重点实验室,陕西,杨凌,712100;中国国土资源经济研究院,北京,101149;中国科学院,水利部,水土保持研究所土壤侵蚀与旱地农业国家重点实验室,陕西,杨凌,712100 |
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| 基金项目： | 国家自然科学基金资助项目(40471079)，国家自然科学重点基金资助项目(40335050)，中国科学院知识创新重要方向项目(KZCX3 SW 422)~~ |
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| 摘 要： | 室内交叉布设不同的稀土氧化物,通过人工模拟次降雨,在同一试验条件下,对坡面侵蚀沿顺坡方向和深度方向的演变过程同时展开研究。结果表明:REE示踪技术对定量研究土壤侵蚀具有较高的精度;降雨前期,片蚀与细沟侵蚀发育程度基本相当;后期细沟侵蚀占据坡面侵蚀的主导地位,其侵蚀平均加速度和平均侵蚀率分别是片蚀的15倍、9倍;试验结束,细沟侵蚀占据坡面总侵蚀的90%;本试验条件下,坡面下1/3区域为侵蚀活跃带。
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| 关 键 词： | 黄土 坡面侵蚀 时空演变过程 REE示踪技术 |
| 文章编号： | 1001-6791(2005)02-0174-07 |
| 收稿时间： | 2003-12-25 |
| 修稿时间： | 2003-12-25 |
Study on spatial-temporal process of soil loss on loess slope surface by rare earth element tracers technology |
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| XUE Ya-zhou,LIU Pu-ling,YANG Ming-yi,JU Tong-jun. Study on spatial-temporal process of soil loss on loess slope surface by rare earth element tracers technology[J]. Advances in Water Science, 2005, 16(2): 174-180 |
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| Authors: | XUE Ya-zhou LIU Pu-ling YANG Ming-yi JU Tong-jun |
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| Affiliation: | 1.State Key Laboratory of Soil Erosion And Dryland Farming on Loess Plateau, Institute of Soil and Water Conservation, CAS and MWR, Yangling 712100, China;2.Chinese Academy of Land and Resources Economics, Beijing 101149, China |
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| Abstract: | By placing different rare earth elements (REE) in different soil depth and different section across one slope in an indoor plot, one simulated rainfall was applied to study the spatial-temporal process both of depth and section erosion across one slope plot simultaneously. The results indicated that the REE tracer technology has high precision to quantify the spatial-temporal process of soil erosion; In earlier rainfall course, the development degree of sheet and rill erosion was general equation; Otherwise in the following course, the rill erosion was dominant in the total erosion, its average erosion acceleration and the average erosion rate was 15 and 9 times of sheet erosion, respectively; In the end of experiment, the rill erosion took up 90% of total erosion amount; The section of slope bottom occupying about 1/3 slope area was active erosion segment in this experiment. |
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| Keywords: | loess slope erosion temporal-spatial erosion process REE tracer technology |
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