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。
A fractal method is employed to estimate soil hydraulic conductivity from the particle-size distribution data (PSD). The pore surface fractal dimension is 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.
出处
《水科学进展》
EI
CAS
CSCD
北大核心
2003年第4期464-470,共7页
Advances in Water Science
基金
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)~~
