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DOI | 10.1002/2017WR020796 |
Introduction and evaluation of a Weibull hydraulic conductivity-pressure head relationship for unsaturated soils | |
Assouline, Shmuel1; Selker, John2 | |
2017-06-01 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2017 |
卷号 | 53期号:6 |
文章类型 | Article |
语种 | 英语 |
国家 | Israel; USA |
英文摘要 | Analytical and numerical solutions for flow through partially saturated soils typically require functional relationships between water content, pressure, and hydraulic conductivity. Here we propose a Weibull-type function to describe the hydraulic conductivity-pressure head function. We show that this is a more flexible function that has the ability to address air entry pressure, while retaining the ease of integration and differentiation that facilitates many important computations which have to this point favored the Gardner exponential function (which is a special case of the proposed function). The ability to fit measured values is shown to be better than commonly employed functions of similar simplicity. Strong relationships were found between the parameters of the proposed function and the corresponding soil water retention curve, thus providing predictive capability. A simple relationship was also found between the parameters of the function and the wetting front pressure, psi(f). Applying the proposed function to estimate psi(f) improves the accuracy of predictions for infiltration using the Green and Ampt model. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000405997000027 |
WOS关键词 | ONE-DIMENSIONAL INFILTRATION ; POROUS-MEDIA ; PONDED CONDITIONS ; CONCEPTUAL-MODEL ; WATER ; EQUATION ; FLOW ; AIR ; PARAMETERS ; CURVE |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/21187 |
专题 | 资源环境科学 |
作者单位 | 1.ARO, Volcani Ctr, Inst Soil Water & Environm Sci, Rishon Leziyyon, Israel; 2.Oregon State Univ, Dept Biol & Ecol Engn, Corvallis, OR 97331 USA |
推荐引用方式 GB/T 7714 | Assouline, Shmuel,Selker, John. Introduction and evaluation of a Weibull hydraulic conductivity-pressure head relationship for unsaturated soils[J]. WATER RESOURCES RESEARCH,2017,53(6). |
APA | Assouline, Shmuel,&Selker, John.(2017).Introduction and evaluation of a Weibull hydraulic conductivity-pressure head relationship for unsaturated soils.WATER RESOURCES RESEARCH,53(6). |
MLA | Assouline, Shmuel,et al."Introduction and evaluation of a Weibull hydraulic conductivity-pressure head relationship for unsaturated soils".WATER RESOURCES RESEARCH 53.6(2017). |
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