| 草甸土近地表解冻深度对坡面降雨侵蚀影响研究 |
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| 引用本文： | 范昊明,张瑞芳,武敏,周丽丽.草甸土近地表解冻深度对坡面降雨侵蚀影响研究[J].水土保持学报,2010,24(3). |
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| 作者姓名： | 范昊明 张瑞芳 武敏 周丽丽 |
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| 作者单位： | 沈阳农业大学水利学院,沈阳,110161 |
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| 基金项目： | 国家自然科学基金资助项目，沈阳农业大学青年科学基金 |
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| 摘 要： | 采用室外人工模拟降雨实验,研究了春季解冻期近地表草甸土解冻深度对该时期坡面降雨侵蚀过程的影响。结果表明:土壤解冻深度对入渗、产流以及侵蚀量有较大影响。由于降雨过程中冻土层逐渐向下移动,解冻土层厚度增加,坡面产流和入渗也随之经历着此消彼长的过程。对同一降雨强度,解冻深度愈小,坡面初始产流时间愈早,前期侵蚀率愈大,土壤侵蚀总量也愈大,但降雨后期侵蚀率增幅减小。随着降雨时间的延长,坡面随解冻深度不同发生不同程度的细沟侵蚀。降雨前期解冻深度越小,降雨过程中发展为细沟侵蚀的时间越早,侵蚀强度也越严重,降雨过程中侵蚀率大小的变化也受到细沟发育程度的影响。
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| 关 键 词： | 模拟降雨 解冻深度 产流过程 侵蚀过程 草甸土 |
Study on Sloping Land Rainfall Erosion Affected by Thaw Depth of Near-surface Meadow Soil |
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| FAN Hao-ming,ZHANG Rui-fang,WU Min,ZHOU Li-li.Study on Sloping Land Rainfall Erosion Affected by Thaw Depth of Near-surface Meadow Soil[J].Journal of Soil and Water Conservation,2010,24(3). |
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| Authors: | FAN Hao-ming ZHANG Rui-fang WU Min ZHOU Li-li |
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| Institution: | FAN Hao-ming,ZHANG Rui-fang,WU Min,ZHOU Li-li(College of Water Conservancy,Shenyang Agriculture University,Shenyang 110161) |
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| Abstract: | In this paper the effects of near-surface meadow soil thaw depth in the spring thaw period on sloping land erosion process was studied,using outdoor artificial simulated rainfall experiment.The results showed that the soil thaw depth have great effects on soil infiltration,run-off and erosion.As the frozen soil layer moved down gradually in the rainfall process,the soil thaw depth increased,surface runoff and infiltration have also experienced a shift in the process.Under the same rainfall intensity,the sma... |
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| Keywords: | artificial simulated rainfall thaw depth runoff process erosion process meadow soil |
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