Arid
DOI10.1029/2010WR010229
Relationship between specific surface area and the dry end of the water retention curve for soils with varying clay and organic carbon contents
Resurreccion, Augustus C.1; Moldrup, Per2; Tuller, Markus3; Ferre, T. P. A.4; Kawamoto, Ken5,6; Komatsu, Toshiko5,6; De Jonge, Lis Wollesen7
通讯作者Resurreccion, Augustus C.
来源期刊WATER RESOURCES RESEARCH
ISSN0043-1397
出版年2011
卷号47
英文摘要

Accurate description of the soil water retention curve (SWRC) at low water contents is important for simulating water dynamics and biochemical vadose zone processes in arid environments. Soil water retention data corresponding to matric potentials of less than -10 MPa, where adsorptive forces dominate over capillary forces, have also been used to estimate soil specific surface area (SA). In the present study, the dry end of the SWRC was measured with a chilled-mirror dew point psychrometer for 41 Danish soils covering a wide range of clay (CL) and organic carbon (OC) contents. The 41 soils were classified into four groups on the basis of the Dexter number (n = CL/OC), and the Tuller-Or (TO) general scaling model describing water film thickness at a given matric potential (<-10 MPa) was evaluated. The SA estimated from the dry end of the SWRC (SA_SWRC) was in good agreement with the SA measured with ethylene glycol monoethyl ether (SA_EGME) only for organic soils with n >10. A strong correlation between the ratio of the two surface area estimates and the Dexter number was observed and applied as an additional scaling function in the TO model to rescale the soil water retention curve at low water contents. However, the TO model still overestimated water film thickness at potentials approaching ovendry condition (about -800 MPa). The semi-log linear Campbell-Shiozawa-Rossi-Nimmo (CSRN) model showed better fits for all investigated soils from -10 to -800 MPa and yielded high correlations with CL and SA. It is therefore recommended to apply the empirical CSRN model for predicting the dry part of the water retention curve (-10 to -800 MPa) from measured soil texture or surface area. Further research should aim to modify the more physically based TO model to obtain better descriptions of the SWRC in the very dry range (-300 to -800 MPa).


类型Article
语种英语
国家Philippines ; Denmark ; USA ; Japan
收录类别SCI-E
WOS记录号WOS:000292152900001
WOS关键词COUPLING DIAZINON VOLATILIZATION ; UNSATURATED SOILS ; PHYSICAL-PROPERTIES ; HAMAKER CONSTANTS ; VAPOR EXTRACTION ; OVEN DRYNESS ; TRANSPORT ; EQUATION ; SORPTION ; MODEL
WOS类目Environmental Sciences ; Limnology ; Water Resources
WOS研究方向Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources
来源机构University of Arizona
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/170808
作者单位1.Univ Philippines Diliman, Inst Civil Engn, Quezon City 1101, Philippines;
2.Univ Aalborg, Dept Biotechnol Chem & Environm Engn, Environm Engn Sect, DK-9000 Aalborg, Denmark;
3.Univ Arizona, Dept Soil Water & Environm Sci, Tucson, AZ 85721 USA;
4.Univ Arizona, Dept Hydrol & Water Resources, Tucson, AZ 85721 USA;
5.Saitama Univ, Grad Sch Sci & Engn, Sakura Ku, Saitama 3388570, Japan;
6.Saitama Univ, Inst Environm Sci & Technol, Saitama 3388570, Japan;
7.Aarhus Univ, Dept Agroecol & Environm, DK-8830 Tjele, Denmark
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GB/T 7714
Resurreccion, Augustus C.,Moldrup, Per,Tuller, Markus,et al. Relationship between specific surface area and the dry end of the water retention curve for soils with varying clay and organic carbon contents[J]. University of Arizona,2011,47.
APA Resurreccion, Augustus C..,Moldrup, Per.,Tuller, Markus.,Ferre, T. P. A..,Kawamoto, Ken.,...&De Jonge, Lis Wollesen.(2011).Relationship between specific surface area and the dry end of the water retention curve for soils with varying clay and organic carbon contents.WATER RESOURCES RESEARCH,47.
MLA Resurreccion, Augustus C.,et al."Relationship between specific surface area and the dry end of the water retention curve for soils with varying clay and organic carbon contents".WATER RESOURCES RESEARCH 47(2011).
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