| 非饱和土壤水力参数预测的分形模型 |
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| 引用本文： | 刘建国,聂永丰.非饱和土壤水力参数预测的分形模型[J].水科学进展,2001,12(1):99-106. |
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| 作者姓名： | 刘建国 聂永丰 |
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| 作者单位： | 清华大学环境科学与工程系, 北京100084 |
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| 摘 要： | 综述了利用分形几何理论,可在土壤水力性质,包括土壤水分特征曲线及水力传导系数与土壤结构分维之间建立起一定的函数关系式.这些函数关系式大多与Campbell定律具有相同或相似的幂定律形式,一方面揭示了Campbell定律的物理实质,另一方面可用于土壤持水量及水力传导系数的预测.
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| 关 键 词： | 非饱和土壤 分形 土壤持水量 水力传导系数 |
| 文章编号： | 1001-6791(2001)01-0099-08 |
| 收稿时间： | 2000-01-03 |
Fractal Models for Predicting Unsaturated Soil Hydraulic Parameters |
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| LIU Jian-guo,NIE Yong-feng.Fractal Models for Predicting Unsaturated Soil Hydraulic Parameters[J].Advances in Water Science,2001,12(1):99-106. |
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| Authors: | LIU Jian-guo NIE Yong-feng |
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| Affiliation: | Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China |
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| Abstract: | The soil structures, including soil particlemass(size)distribution, pore volume distribution and solid-pore interface roughness, are fractals in limited length-scales and may be represented by mass fractal dimension, pore volume fractal dimension and surface fractal dimension. The functional equations consistent with the Campbell Law have been established between fractal dimensions and the hydraulic properties of soils in literatures reviewed. The equations disclose the physical mechanism of the Campbell Law and may be used to predict soil water retention and hydraulic conductivity of unsaturated soil. |
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| Keywords: | unsaturated soil fractal soilwater retention hydraulic conductivity |
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