| 土壤容重对土壤水分入渗特性影响研究 |
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| 引用本文： | 潘云,吕殿青.土壤容重对土壤水分入渗特性影响研究[J].灌溉排水学报,2009,28(2). |
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| 作者姓名： | 潘云 吕殿青 |
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| 作者单位： | 潘云,PAN Yun(湖南师范大学,资源与环境科学学院,长沙,410081);吕殿青,LU Dian-qing(湖南师范大学,资源与环境科学学院,长沙,410081;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,杨凌,712100)
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| 基金项目： | 国家自然科学基金，湖南省自然科学基金，湖南师范大学青年优秀人才培养计划项目，黄土高原土壤侵蚀与旱地农业国家重点实验室开放基金 |
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| 摘 要： | 采用一维垂直积水入渗法研究不同容重对入渗率、累积入渗量及湿润锋的影响,试验结果表明对应于同一入渗时间,容重越大,入渗率、累积入渗量及湿润锋深度均越低;相对于基准入渗量和基准湿润锋,容重越大,其减渗率μ和减锋率η均随之越大;稳定入渗率有随土壤容重的增加而减小的趋势;不同容重的累积入渗量和时间的平方根呈显著的线性关系,拟合的系数M随容重增加而降低,并与容重较好的呈幂函数关系;湿润锋深度与入渗时间呈幂函数关系,随着容重的增加,入渗的系数A降低,而指数B差异较小,系数A与容重之间较好的符合乘幂函数关系。研究结果为从入渗特性推求容重与土壤水分运动参数的关系提供定量分析依据。
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| 关 键 词： | 容重 累积入渗量 入渗率 湿润锋 减渗率 |
Effects of Soil Bulk Density on Characteristics of Soil Infiltration |
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| PAN Yun,LU Dian-qing.Effects of Soil Bulk Density on Characteristics of Soil Infiltration[J].Journal of Irrigation and Drainage,2009,28(2). |
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| Authors: | PAN Yun LU Dian-qing |
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| Institution: | 1.College of Resources and Environment Science;Hunan Normal University;Changsha 410081;China;2.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau;Institute of Soil and Water Conservation;Chinese Academy of Sciences;Yangling 712100;China |
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| Abstract: | The influences of soil bulk density on infiltration rate,accumulative infiltration and wetting front were studied by one dimension vertical infiltration experiment in this paper.The experiments results showed that soil infiltration characteristics were greatly affected by soil bulk density.Infiltration rate,accumulative infiltration and wetting front depth decreased with the increase of soil bulk density in the same infiltration time.The greater the soil bulk capacity,the larger the infiltration decrease ra... |
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| Keywords: | bulk density accumulative infiltration infiltration rate wetting front infiltration decay ratio |
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