| 黄土坡面侵蚀方式演变与侵蚀产沙过程试验研究 |
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| 引用本文： | 肖培青,郑粉莉,汪晓勇,姚文艺.黄土坡面侵蚀方式演变与侵蚀产沙过程试验研究[J].土壤侵蚀与水土保持学报,2008,22(1):24-27. |
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| 作者姓名： | 肖培青 郑粉莉 汪晓勇 姚文艺 |
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| 作者单位： | [1]中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西杨陵712100 [2]西北农林科技大学资源环境学院,陕西杨陵712100 [3]黄河水利委员会水土保持局,郑州450003 [4]黄委会黄河水利科学研究院,郑州450003 |
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| 基金项目： | 国家基础研究发展计划（2007CB407201）;国家自然科学基金重点项目（40335050）;西北农林科技大学创新团队建设计划（01140202） |
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| 摘 要： | 利用自行设计的双土槽径流小区系统和人工模拟降雨试验研究方法，研究了坡面侵蚀方式演变对坡面侵蚀产沙量的影响，分析了沟蚀发育不同阶段对坡面侵蚀产沙的贡献。结果表明，坡面侵蚀发育初期，沟头溯源侵蚀占主导地位，侵蚀产沙量呈增加趋势；坡面侵蚀发育中期，沟蚀的宽度和深度变化已属于切沟形态发育的范围，导致了侵蚀产沙量的急剧增加；坡面侵蚀发育后期，沟蚀发育过程处于后期稳定阶段，侵蚀产沙量变化伏动较小。在坡面侵蚀发育初期、中期和后期，沟蚀分别占坡面总侵蚀产沙量的28．7％，70．4％和37．1％。
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| 关 键 词： | 侵蚀方式演变 侵蚀产沙过程 沟蚀 黄土坡面 模拟降雨试验 |
| 文章编号： | 1009-2242（2008）01-0024-04 |
| 收稿时间： | 2007-08-09 |
Experimental Study on Erosion Pattern Evolvement and Sediment Process on Loessal Hillslopes |
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| Authors: | XIAO Pei-qing ZHENG Fen-li WANG Xiao-yong YAO Wen-yi |
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| Abstract: | Soil erosion pattern evolvement and their contributions to soil erosion and sediment delivery were qualified using a dual-box system with rainfall simulated experiment. The results showed rill head-cuts was dominant erosion form in initial stages of erosion evolvement process and hillslopoe sediment delivery gradually increased at hillslope in the middle stage of erosion evolvement process, gully head-cuts forward movement, channel deep-cutting, and gully-wall collapsing were dominant, which increased the sediment delivery dramatically; in the last stage of erosion evolvement process, gully development reached to a stable stage and sediment delivery fluctuated little. Gully erosion occupied 28.7%, 70.4%, and 37.1% of the total sediment delivery in initial stages, in the middle stage, and in the last stage, respectively. |
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| Keywords: | erosion pattern evolvement sediment process gully erosion contribution a dual box system simulated rainfall experiment |
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