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确定田间土壤水力传导率的分形方法

刘建立,  徐绍辉,  刘慧,  郭飞

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文章导航 > 水科学进展  > 2003 >  14(4): 464-470
刘建立, 徐绍辉, 刘慧, 郭飞. 确定田间土壤水力传导率的分形方法[J]. 水科学进展, 2003, 14(4): 464-470.
引用本文: 刘建立, 徐绍辉, 刘慧, 郭飞. 确定田间土壤水力传导率的分形方法[J]. 水科学进展, 2003, 14(4): 464-470.
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LIU Jian-li, XU Shao-hui, LIU Hui, GUO Fei. Fractal method for estimating field hydraulic conductivity function from soil particle-size distribution[J]. Advances in Water Science, 2003, 14(4): 464-470.
Citation: LIU Jian-li, XU Shao-hui, LIU Hui, GUO Fei. Fractal method for estimating field hydraulic conductivity function from soil particle-size distribution[J]. Advances in Water Science, 2003, 14(4): 464-470.
shu

确定田间土壤水力传导率的分形方法

  • 1.

    中国科学院南京土壤研究所, 江苏, 南京, 210008;

  • 2.

    南京大学地球科学系, 江苏, 南京, 210093

基金项目: 国家自然科学基金资助项目(49971041);中国科学院南京土壤研究所所长基金课题(ISSDF0004);国家重点基础研究发展规划资助项目(G1999011803)
详细信息
    作者简介:

    刘建立(1973- ),男,河北高邑人,中国科学院南京土壤研究所副研究员,主要从事地下介质中水流与溶质运移数值模拟研究.

  • 中图分类号: S152.7

Fractal method for estimating field hydraulic conductivity function from soil particle-size distribution

  • 1.

    Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China;

  • 2.

    Department of Earth Sciences, Nanjing University, Nanjing 210093, China

Funds: The project is supported by National Natural Science Foundation of China(No.49971041),the Director Foundation of Institute of Soil Science,Chinese Academy of Sciences(No.ISSDF0004),and the National Key Basic Research and Development of China(No.G1999011803).

  • 摘要: 采用了一种简便易行的分形方法来间接估计水力传导率函数,即根据土壤粒径分布曲线确定孔隙表面分形维数,将其作为分形水力传导率模型的参数来预测整个压力水头范围内的水力传导率.利用UNSODA数据库中217个样本的实测资料对模型进行检验,结果表明分形方法预测的水力传导率其精度明显高于根据水分特征曲线利用统计孔径分布模型的估计结果.
    Abstract: A fractal method is employed to estimate soil hydraulic conductivity from the particle-size distribution data(PSD) in the paper.The pore surface fractal dimension is first determined using the PSD curve,and then used in the fractal conductivity models of Mualem and Burdine to predict the field conductivity function.Compared with hydraulic conductivity obtained from the laboratory water retention curve using the statistical pore-size distribution models,the PSD based fractal method produces much better results for 217 samples from the UNSODA soil hydraulic database.
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