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
收藏
页码：839 / 843
页数：5
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