| 春季解冻期白浆土融雪侵蚀模拟研究 |
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| 引用本文： | 范昊明,郭萍,武敏,周丽丽.春季解冻期白浆土融雪侵蚀模拟研究[J].水土保持通报,2011,31(6):130-133. |
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| 作者姓名： | 范昊明 郭萍 武敏 周丽丽 |
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| 作者单位： | 沈阳农业大学水利学院,辽宁沈阳,110161 |
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| 基金项目： | 国家自然科学基金项目“辽西褐土旱作农田区沟灌侵蚀机理与侵蚀过程研究”(41071183),国家自然科学青年基金项目“东北旱地耕作土壤冻融作用机理与春季解冻期土壤侵蚀模拟”(40601054) |
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| 摘 要： | 采用室内人工模拟融雪水冲刷试验,研究了春季解冻期冻融温差、循环次数、土壤初始含水率、融雪水流量和解冻深度这5个控制因子对白浆土侵蚀的影响。结果表明,影响土壤侵蚀的首要因素为融雪水流量。春季解冻期土壤发生侵蚀主要集中在前15次冻融循环过程中,之后即使冻融循环次数增加,侵蚀量增幅也不明显。土壤含水率变化与侵蚀量之间线型关系不明显,初始含水率较小的土壤侵蚀量大于初始含水率较大的侵蚀量。在径流冲刷过程中,融雪流量的大小和土壤冻层的存在,共同影响解冻深度与侵蚀量大小之间的关系。当融雪流量较小时,土壤解冻深度越小侵蚀量越大,二者间呈负相关关系;反之,当融雪流量较大时,土壤解冻深度与侵蚀量之间呈正相关关系。
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| 关 键 词： | 模拟融雪 冻融作用 侵蚀过程 白浆土 |
| 收稿时间： | 2010/12/28 0:00:00 |
| 修稿时间： | 2011/3/29 0:00:00 |
Simulated Snowmelt Runoff on Lessive in Spring Thawing Period |
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| FAN Hao-ming,GUO Ping,WU Min and ZHOU Li-li.Simulated Snowmelt Runoff on Lessive in Spring Thawing Period[J].Bulletin of Soil and Water Conservation,2011,31(6):130-133. |
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| Authors: | FAN Hao-ming GUO Ping WU Min and ZHOU Li-li |
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| Institution: | FAN Hao-ming,GUO Ping,WU Min,ZHOU Li-li(College of Water Conservancy,Shenyang Agriculture University,Shenyang,Liaoning 110161,China) |
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| Abstract: | In order to research the impact of lessive soil erosion under the freeze-thaw condition in spring thaw period,freeze-thaw temperature,freeze-thaw cycles,initial water content,snowmelt water flow,thaw depth were selected to study the effects of these five factors on soil erosion by using indoor artificial simulated snowmelt experiment.The results showed that the primary factor was snowmelt water flow.The erosion was mainly happened in the first 15 freeze-thaw cycles in spring thaw period,even though the cycl... |
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| Keywords: | artificial simulated snowmelt role of freeze-thaw erosion process lessive soil |
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