排灌机械工程学报
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排灌机械工程学报  2018, Vol. 36 Issue (11): 1163-1167    DOI: 10.3969/j.issn.1674-8530.18.1082
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长期再生水灌溉后土壤孔隙分布的多重分形特征
管孝艳1,2*, 杨培岭3, 李柳4, 谭亚男1
1.中国水利水电科学研究院水利研究所, 北京 100048; 2.国家节水灌溉北京工程技术研究中心, 北京 100048; 3.中国农业大学水利与土木工程学院, 北京 100083; 4.河北省黄壁庄水库管理局, 河北 石家庄 050224
Multifractal characteristic of soil pore distribution after long-term recycled water irrigation
GUAN Xiaoyan1,2*, YANG Peiling3, LI liu4, TAN Ya′nan1
1.Department of Irrigation and Drainage, China Insitute of Water Resources and Hydropower Research, Beijing 100048, China; 2.National Center of Efficient Irrigation Engineering and Technology Research-Beijing, Beijing 100048, China; 3.College of Water Resources & Civil Engineering, China Agricultural University, Beijing 100083, China; 4.Huangbizhuang Reservoir Authority in Hebei Province, Shijiazhuang, Hebei 050224, China
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摘要 土壤结构是表征土壤质量的重要指标之一.为了定量表征长期再生水灌溉后土壤孔隙分布的非均匀性,以不同年限再生水灌溉后的土壤为研究对象,采用KYKY-2800B型扫描电子显微镜获取土壤数字图像,利用数字图像处理技术测定了土壤的孔隙分布特征,运用多重分形谱参数描述了土壤孔隙分布的非均质性,探讨了土壤孔隙分布多重分形曲线对称性的意义.结果表明:多重分形谱可以定量描述土壤孔隙分布的非均质性,土壤孔隙分布的多重分形奇异谱函数α-f(α)表现为非对称连续性分布,奇异谱宽度Δα表征了土壤孔隙分布的非均质特征,大兴区北野厂灌区农田土壤孔隙分布的多重分形谱宽度Δα普遍大于石景山衙门口灌区土壤,即具有30 a再生水灌溉历史的土壤其孔隙分布的非均匀性较50 a再生水灌溉历史的土壤孔隙分布的非均匀性大,且北野厂灌区土壤小孔隙的数目小于石景山衙门口灌区土壤小孔隙数目.多重分形参数可以作为定量表征土壤孔隙分布非均匀性的重要指标.
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管孝艳
*
杨培岭
李柳
谭亚男
关键词再生水灌溉   土壤孔隙分布   多重分形   分形谱宽度     
Abstract: Soil structure is one of important indicators for characterizing soil quality. For quantitative characterization of heterogeneity of soil pore distribution after long term recycled water irrigation, the characteristics and heterogeneity of soil pore distribution after recycled water irrigation for various years were analyzed based on KYKY-2800B scanning electron microscope and digital image processing technology and multifractal theory, and then the significance of symmetry of multifractal curve was discussed in this paper. The result showed that the multifractal spectrum could quantitatively describe the heterogeneity of soil pore distribution, and its multifractal singularity spectrum function α-f(α) was continuous and asymmetric, the width of multifractal spectrum Δα could reflect the heterogeneous characteristics of the pore distribution. The width of multifractal spectrum Δα in Beiyechang Irrigation District is generally greater than in Yamenkou Irrigation District, i.e. the pore distribution is more heterogeneous after 30 years recycled water irrigation compared with 50 years recycled water irrigation, but also the number of small pores in Beiyechang Irrigation District was more than the number in Yamenkou Irrigation District. As a result, multifractal parameters can be used as important indicators to characterize the heterogeneity of soil pore distribution quantitatively.
Key wordsrelamed water irrigation   soil pore distribution   multifractal   width of multifractal spectrum   
收稿日期: 2018-04-30;
基金资助:

国家重点研发计划项目(2017YFC0403503)

引用本文:   
管孝艳,*,杨培岭等. 长期再生水灌溉后土壤孔隙分布的多重分形特征[J]. 排灌机械工程学报, 2018, 36(11): 1163-1167.
GUAN Xiao-Yan-,*,YANG Pei-Ling- et al. Multifractal characteristic of soil pore distribution after long-term recycled water irrigation[J]. Journal of Drainage and Irrigation Machinery Engin, 2018, 36(11): 1163-1167.
 
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