基于分形的土壤水分输运机制与模型研究
Base on Fractal for the Soil Moisture Transportation Mechanism and Model Study
作者:冉景江(四川大学 水利水电学院, 四川 成都 610065);梁川(四川大学 水利水电学院, 四川 成都 610065);赵燮京(农业部 长江上游农业资源与环境重点开放实验室, 四川 成都 610066)
Author:(School of Water Resource and Hydropower, Sichuan Univ., Chengdu 610065, China);(School of Water Resource and Hydropower, Sichuan Univ., Chengdu 610065, China);(The Key Open Lab. of Agriculture Resource and Environment in Upper Reaches of Yangtze River, Ministry of Agriculture, Chengdu 610066, China)
收稿日期:2006-03-01 年卷(期)页码:2006,38(4):10-14
期刊名称:工程科学与技术
Journal Name:Advanced Engineering Sciences
关键字:FBM;土壤水分;物理机制;列维分布;反常输运
Key words:FBM;soil water;physical mechanism;Lévy distribution;abnormality transportation
基金项目:国家863课题(2002AA66Z3263)
中文摘要
通过对土壤中水分输运的物理机制的分析,利用分数布朗运动(FBM)解释了土壤内水分输运的物理机制,得出土壤内水分输运的定量数理解析模型,模型的解析解是具有分形特征的列维(Lévy)分布。用实例验证了土壤内水分的反常输运特征,揭示了土壤水分运动的内在机制,研究结果具有实际可应用性。
英文摘要
The physical mechanism of soil water transportation is explained using fractional Brownian motion(FBM).Quantitative mathematical physical analysis model is proposed. The analytical solution demonstrates fractal characteristics of Lévy distribution. Practical example is used to verify the abnormal transportation of soil water. The research has shown the intrinsic mechanism of soil water movement and the result is feasible.
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