A simplified method to determine the first primary drying and wetting curves of water diffusivity of unsaturated soil

被引：0

作者：

Sommella, A. ^{[1
]}

Comegna, A. ^{[2
]}

Palladino, M. ^{[1
]}

Coppola, A. ^{[3
]}

机构：

[1] Univ Naples Federico II, Div Water Resources Management, Naples, Italy

[2] Univ Basilicata, Sch Agr Forestry Food & Environm Sci SAFE, Potenza, Italy

[3] Univ Basilicata, Dept European & Mediterranean Cultures Architectu, Hydraul & Hydrol Div, Matera, Italy

来源：

JOURNAL OF AGRICULTURAL ENGINEERING | 2013年 / 44卷

关键词：

soil hydraulic characterization; soil water diffusivity; laboratory method;

D O I：

10.4081/jae.2013.s2.e168

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Within the framework of a research project examining the spatial variability of hydraulic characteristics of soil intended for irrigation, some of the more frequently used analytical expressions describing the laws linking diffusivity D to the water content of the soil were verified. By studying the flow field of soil samples tested in the laboratory, under one-dimensional wetting and drying cycles, it has been found that the laws of hydraulic diffusivity of the exponential types can be ascribed to them. Finally, a simplified laboratory method was proposed which, with the aid of nomographs, allows the definition of the law D(theta) to be easily arrived at.

引用

页码：839 / 843

页数：5

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