| 杨凌包气带深层黄土颗粒分形特性的实验研究 |
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| 引用本文： | 胡晓蕾,张富仓,赵旭. 杨凌包气带深层黄土颗粒分形特性的实验研究[J]. 节水灌溉, 2009, 0(3) |
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| 作者姓名： | 胡晓蕾 张富仓 赵旭 |
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| 作者单位： | 西北农林科技大学旱区农业水土工程教育部重点实验室,陕西,杨凌,712100 |
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| 基金项目： | 国家自然科学基金(50579066)。 |
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| 摘 要： | 通过对包气带深层黄土土壤样品颗粒组成的分析,研究了土壤颗粒体积分形维数与土壤各粒级含量的关系.同时利用实测的土壤水分特征曲线,拟合得到其分形模型中的孔隙大小分形维数,最后对颗粒体积分形维数与拟合的孔隙大小分形维数的关系进行了对比研究.结果表明:体积分形维数介于2.577～2.748之间,且随包气带层深度的增加分形维数呈减小趋势;体积分形维数与0.5～0.25 mIn、0.02～0.002 mm颗粒含量呈显著负相关,与0.25～0.05 mm、＜0.002 mm颗粒含量呈显著正相关,所建立的多元回归方程拟合的体积分形维数相对误差限为0～0.42%,具有较高的精度;同一质地的颗粒体积分形维数与土壤水分特征曲线分形模型中的孔隙大小分形维数呈良好的线性关系.
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| 关 键 词： | 包气带 颗粒组成 体积分形维数 土壤水分特征曲线 孔隙大小分形维数 |
Experimental Study on Fractal Properties for Deep Loessal Soil of Aeration Zone in Yangling Region |
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| HU Xiao-lei , ZHANG Fu-cang , ZHAO Xu. Experimental Study on Fractal Properties for Deep Loessal Soil of Aeration Zone in Yangling Region[J]. Water Saving Irrigation, 2009, 0(3) |
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| Authors: | HU Xiao-lei ZHANG Fu-cang ZHAO Xu |
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| Affiliation: | Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education;Northwest A&F University;Yangling 712100;Shaanxi Province;China |
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| Abstract: | The soil granule volume fractal dimension and its relationship with contents of different particle-size are studied through the analysis of granule composition of 30 soil samples in deep loessal soil of aeration zone.At the same time,the fitted spacing fractal dimension of soil water retention curve is calculated by using its fractal model,the relationship between spacing fractal dimension of soil water retention curve and volume fractal dimension of soil particle-size is analyzed.The results show that the ... |
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| Keywords: | aeration zone granule composition volume fractal dimension soil water retention curve spacing fractal dimension |
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