Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018WR023609 |
Estimating the Permeability of Naturally Structured Soil From Percolation Theory and Pore Space Characteristics Imaged by X-Ray | |
Koestel, John1; Dathe, Annette2; Skaggs, Todd H.3; Klakegg, Ove2; Ahmad, Muhammad Arslan1; Babko, Maryia1; Gimenez, Daniel4; Farkas, Csilla2; Nemes, Attila2; Jarvis, Nicholas1 | |
2018-11-01 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2018 |
卷号 | 54期号:11页码:9255-9263 |
文章类型 | Article |
语种 | 英语 |
国家 | Sweden; Norway; USA |
英文摘要 | The saturated hydraulic conductivity of soil, K-s, is a critical parameter in hydrological models that remains notoriously difficult to predict. In this study, we test the capability of a model based on percolation theory and critical path analysis to estimate K-s measured on 95 undisturbed soil cores collected from contrasting soil types. One parameter (the pore geometry factor) was derived by model fitting, while the remaining two parameters (the critical pore diameter, d(c), and the effective porosity) were derived from X-ray computed tomography measurements. The model gave a highly significant fit to the K-s measurements (p<0.0001) although only 47% of the variation was explained and the fitted pore geometry factor was approximately 1 to 2 orders of magnitude larger than various theoretical values obtained for idealized porous media and pore network models. Apart from assumptions in the model that might not hold in reality, this could also be attributed to experimental error induced by, for example, air entrapment and changes in the soil pore structure occurring during sample presaturation and the measurement of K-s. Variation in the critical pore diameter, d(c), was the dominant source of variation in K-s, which suggests that d(c) is a suitable length scale for predicting soil permeability. Thus, from the point of view of pedotransfer functions, it could be worthwhile to direct future research toward exploring the correlations of d(c) with basic soil properties and site attributes. |
英文关键词 | permeability saturated hydraulic conductivity soil critical path analysis percolation model |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000453369400038 |
WOS关键词 | SATURATED HYDRAULIC CONDUCTIVITY ; ELECTRICAL-CONDUCTIVITY ; PEDOTRANSFER FUNCTIONS ; PREFERENTIAL FLOW ; POROUS-MEDIA ; TRANSPORT ; PREDICTION ; PARAMETERS ; TOMOGRAPHY ; SANDSTONE |
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/20385 |
专题 | 资源环境科学 |
作者单位 | 1.Swedish Univ Agr Sci, Dept Soil & Environm, Uppsala, Sweden; 2.Norwegian Inst Bioecon Res, As, Norway; 3.USDA ARS, US Salin Lab, 4500 Glenwood Dr, Riverside, CA 92501 USA; 4.Rutners Univ, Dept Environm Sci, New Brunswick, NJ USA |
推荐引用方式 GB/T 7714 | Koestel, John,Dathe, Annette,Skaggs, Todd H.,et al. Estimating the Permeability of Naturally Structured Soil From Percolation Theory and Pore Space Characteristics Imaged by X-Ray[J]. WATER RESOURCES RESEARCH,2018,54(11):9255-9263. |
APA | Koestel, John.,Dathe, Annette.,Skaggs, Todd H..,Klakegg, Ove.,Ahmad, Muhammad Arslan.,...&Jarvis, Nicholas.(2018).Estimating the Permeability of Naturally Structured Soil From Percolation Theory and Pore Space Characteristics Imaged by X-Ray.WATER RESOURCES RESEARCH,54(11),9255-9263. |
MLA | Koestel, John,et al."Estimating the Permeability of Naturally Structured Soil From Percolation Theory and Pore Space Characteristics Imaged by X-Ray".WATER RESOURCES RESEARCH 54.11(2018):9255-9263. |
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