摘要
本文在土壤染色示踪试验的基础上,对多孔介质活动性流场模型的本构关系进行了分析。在此基础上讨论了流动非均匀性和本构关系参数之间的关系。研究表明:土壤剖面不同深度和宽度处的染色比例值都增大时,活动性流场模型本构关系中的分形参数值减小;本构关系参数值和水流最大入渗深度与50%面积染色深度的比值及土壤剖面宽度处染色比例的最大值与最小值的比值均成正相关关系。此外,本文还利用黏土中的染色示踪试验数据分析了活动性流场模型本构关系参数的取值。
The constitutive relations of active region model were studied using dye infiltration experiment in field, and the key parameter of the constitutive relations was calculated. The result showed that the parameter decreased as the average dye coverage was increased for given depths and given widths in soil profiles. The parameter is correlated positively to the ratios of the maximum depth to the 50% dye coverage depth. A positive correlation was also found between the parameter and ratios of the maximum dye coverage to the minimum dye coverage for given widths of soil profiles. The determination of the parameter was also investigated based on experimental data for different soils.
出处
《水利学报》
EI
CSCD
北大核心
2008年第2期151-157,共7页
Journal of Hydraulic Engineering
基金
国家自然科学基金资助项目(505790795060901950528910)
关键词
活动性流场模型
连续性模型
非均匀流动
多孔介质
分形
本构关系
active region model
continuum model
heterogeneous water flow
porous media
fractal
constitutive relations
