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Previous Next 		Contents: November 2008, Volume 7, Issue 4   [Index by Author] 
Down ORIGINAL RESEARCH
Down SPECIAL SECTION: NONCLASSICAL TRANSPORT
Down BOOK REVIEWS
Down ERRATUM

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To see an article, click its [Full Text] link. To review many abstracts, check the boxes to the left of the titles you want, and click the 'Get All Checked Abstract(s)' button. To see one abstract at a time, click its [Abstract] link.

ORIGINAL RESEARCHBack

David A. Robinson, Hiruy Abdu, Scott B. Jones, Mark Seyfried, Inma Lebron, and Rosemary Knight

We used electromagnetic induction (EMI) geophysical imaging to map the soils of a small watershed. By comparing the gephysical signal with plant community patterns, we have discovered distinct vegetation niches corresponding to distinct zones of bulk soil electrical conductivity.
Published online 29 October 2008; doi: 10.2136/vzj2008.0101
Vadose Zone J Oct 29 2008: 1132–1138 [Abstract] [Full Text] [PDF]  

Tjalfe G. Poulsen, Helle Blendstrup, and Per Schjønning

Air permeability as a function of gravimetric water content and dry bulk density is proposed as an indicator of structure formation for six porous materials including soil, peat, and compost. Air permeability and structure formation could be divided into three regions with respect to water content, and both decrease with increasing bulk density.
Published online 29 October 2008; doi: 10.2136/vzj2007.0147
Vadose Zone J Oct 29 2008: 1139–1143 [Abstract] [Full Text] [PDF]  

D. M. Wellman, J. M. Zachara, C. Liu, N. P. Qafoku, S. C. Smith, and S. W. Forrester

The low water content of the Hanford Site vadose zone is hypothesized to affect desorption/dissolution of uranium into porewater and/or groundwater. Hydraulically saturated and unsaturated column experiments were performed to evaluate the effect of water content on the advective desorption and migration of uranium from contaminated sediments.
Published online 29 October 2008; doi: 10.2136/vzj2007.0166
Vadose Zone J Oct 29 2008: 1144–1159 [Abstract] [Full Text] [PDF]  

Peter F. Germann and Said Attia al Hagrey

Infiltration into a sand tank (3 by 5 m, 2 m deep) produced a constant wetting front velocity that indicates dynamic equilibrium of forces. Hence, momentum dissipation is assumed to equilibrate with gravity, while capillarity is considered a secondary force. The corresponding model satisfactorily approached the observed water content wave and drainage flow.
Published online 29 October 2008; doi: 10.2136/vzj2007.0172
Vadose Zone J Oct 29 2008: 1160–1169 [Abstract] [Full Text] [PDF]  

Celso L. Prevedello, Jocely M. T. Loyola, Klaus Reichardt, and Donald R. Nielsen

A new solution of the Boltzmann transform as a function of matric potential is derived to solve Richards equation for horizontal water infiltration into a sand. It also improves and provides a versatile alternative to the well-known analysis pioneered by Green and Ampt in 1911.
Published online 29 October 2008; doi: 10.2136/vzj2007.0181
Vadose Zone J Oct 29 2008: 1170–1177 [Abstract] [Full Text] [PDF]  

Jason J. Gurdak, Michelle A. Walvoord, and Peter B. McMahon

We present a regional-scale method to predict locations of depression-focused preferential flow and chemical transport, a process that helps explain the presence of agrichemicals in recently recharged groundwater of the High Plains aquifer despite chemical transit times from diffuse recharge that exceed historical agricultural activity.
Published online 14 January 2009; doi: 10.2136/vzj2007.0145
Vadose Zone J Jan 14 2009: 1218–1230 [Abstract] [Full Text] [PDF]  

Sabine Goldberg, Seunghun Hyun, and Linda S. Lee

Arsenate, arsenite, selenate, and selenite adsorption as a function of the aqueous solution concentration of these constituents was determined for a set of soils near ash disposal facilities. A chemical surface complexation model was applied to quantify the adsorption of these constituents as a function of their aqueous solution concentrations.
Published online 14 January 2009; doi: 10.2136/vzj2008.0013
Vadose Zone J Jan 14 2009: 1231–1238 [Abstract] [Full Text] [PDF]  

M. Bagher Farmani, Nils-Otto Kitterød, and Henk Keers

We estimated flow parameters in the vadose zone of an ice-contact delta in Norway by inverse modeling of vadose zone flows produced by water infiltration during snowmelt. The inverse flow modeling was done by conditioning on different combinations of time-lapse GPR travel-time tomography and time series of the level of the groundwater table.
Published online 14 January 2009; doi: 10.2136/vzj2007.0169
Vadose Zone J Jan 14 2009: 1239–1252 [Abstract] [Full Text] [PDF]  

Alexandre M. Tartakovsky, Diogo Bolster, and Daniel M. Tartakovsky

We present a simple, semianalytical approach to delineate multiple layers in partially saturated soils from resistivity and saturation measurements taken at several depths along a borehole. The proposed inversion algorithm is computationally efficient and can serve either as a stand-alone tool for layer delineation or as an autonomous module in a more comprehensive geophysical survey. We provide a detailed analysis of the algorithm's convergence and identify potential pitfalls.
Published online 14 January 2009; doi: 10.2136/vzj2008.0009
Vadose Zone J Jan 14 2009: 1253–1260 [Abstract] [Full Text] [PDF]  

Arash Massoudieh and Timothy R. Ginn

The 5-yr mobility of Zn, Cu, and Pb in the vadose zone underneath an infiltration basin were modeled both with and without a colloidal phase present. Only the former model fitted profile data well. The results support the hypothesis that colloidal particles play a significant role in transport of metal species.
Published online 14 January 2009; doi: 10.2136/vzj2007.0179
Vadose Zone J Jan 14 2009: 1261–1268 [Abstract] [Full Text] [PDF]  

Tjalfe G. Poulsen and Helle Blendstrup

A simple model for predicting air permeability in natural porous media as a function of water content and dry bulk density was developed. The model is able to predict air permeability throughout the entire bulk density-water content range for a specific porous medium based on only four measurements of air permeability.
Published online 14 January 2009; doi: 10.2136/vzj2008.0035
Vadose Zone J Jan 14 2009: 1269–1275 [Abstract] [Full Text] [PDF]  

Anne Thorbjørn, Per Moldrup, Helle Blendstrup, Toshiko Komatsu, and Dennis E. Rolston

A model for the gas diffusion coefficient in unsaturated, structureless soil is presented. The model considers resistance to gas diffusion caused by air-phase reduction, solids-phase induced tortuosity, and water-phase induced blockages. The dominating resistance to gas diffusion is discussed in relation to soil texture and compaction.
Published online 14 January 2009; doi: 10.2136/vzj2008.0023
Vadose Zone J Jan 14 2009: 1276–1286 [Abstract] [Full Text] [PDF]  

Jaromir Dusek, Horst H. Gerke, and Tomas Vogel

Effects of surface flow and solute boundary conditions for a two-dimensional dual-permeability model on Br leaching from a tile-drained field were quantified. The conditions varied included: (i) irrigation scheme characteristics, (ii) type of the solute boundary condition, and (iii) the domain (matrix or macropores) to which solute was applied.
Published online 14 January 2009; doi: 10.2136/vzj2007.0175
Vadose Zone J Jan 14 2009: 1287–1301 [Abstract] [Full Text] [PDF]  

Nicholas Jarvis

Dual-permeability models are sensitive to near-saturated hydraulic properties, yet little is known about how parameters can be estimated. A new closed-form model of near-saturation hydraulic properties was derived and successfully fitted to soil macropore data. Macropore size distribution was functionally related to clay content and macroporosity.
Published online 14 January 2009; doi: 10.2136/vzj2008.0065
Vadose Zone J Jan 14 2009: 1302–1310 [Abstract] [Full Text] [PDF]  

SPECIAL SECTION: NONCLASSICAL TRANSPORTBack

Leonid Bolshov, Peter Kondratenko, and Karsten Pruess
Preface: Nonclassical Transport
An introduction is given for a series of four papers that address mathematical modeling of transport phenomena in variably saturated, highly heterogeneous media.
Published online 14 January 2009; doi: 10.2136/vzj2008.0109
Vadose Zone J Jan 14 2009: 1179–1180 [Full Text] [PDF]  

Leonid Bolshov, Peter Kondratenko, Karsten Pruess, and Vladimir Semenov

An overview of the problem of solute transport in unsaturated heterogeneous media is presented. Field and laboratory observations that demonstrate nonclassical flow and transport behavior are reviewed. Basic factors and physical concepts to describe anomalous transport in fractured rocks are discussed.
Published online 14 January 2009; doi: 10.2136/vzj2007.0153
Vadose Zone J Jan 14 2009: 1181–1190 [Abstract] [Full Text] [PDF]  

Alexander Dykhne, Ilya Dranikov, Peter Kondratenko, and Leonid Matveev

Analysis of diffusion in heterogeneous media with sharply contrasting properties was performed. Over time, three different transport regimes were realized, resulting in a complex structure of concentration tails. The more distant tail segment was determined by the earlier time transport regime.
Published online 14 January 2009; doi: 10.2136/vzj2007.0152
Vadose Zone J Jan 14 2009: 1191–1197 [Abstract] [Full Text] [PDF]  

Leonid Bolshov, Peter Kondratenko, Leonid Matveev, and Karsten Pruess

New elements were developed to generalize the dual-porosity model for moisture infiltration and solute transport in unsaturated rocks, taking into account fractal aspects of the percolation process. Transport regimes, a complex structure of concentration tails, and effects due to medium characteristic fluctuations were analyzed.
Published online 14 January 2009; doi: 10.2136/vzj2007.0151
Vadose Zone J Jan 14 2009: 1198–1206 [Abstract] [Full Text] [PDF]  

V. M. Goloviznin, I. A. Korotkin, K. Pruess, V. N. Semenov, and O. S. Sorokovikova

A stochastic random walk model of anomalous diffusion was developed to simulate solute transport in highly heterogeneous media. In the special case of isotropic space-independent parameters, the model reduces to the fractional-order advection-dispersion equation model. The model was extended to the multidimensional case with spatial anisotropy and compared with the results of field experiments.
Published online 26 November 2008; doi: 10.2136/vzj2007.0150
Vadose Zone J Nov 26 2008: 1207–1217 [Abstract] [Full Text] [PDF]  

BOOK REVIEWSBack

John R. Nimmo
The Public Fountains of the City of Dijon: H. Darcy. Translated by P. Bobeck. Kendall/Hunt Publishers, Dubuque, IA. 2004. Hardcover, 554 pp. $239.95. ISBN-10: 0757505406; ISBN-13: 978-0757505409.
Published online 14 January 2009; doi: 10.2136/vzj2008.0057
Vadose Zone J Jan 14 2009: 1311–1312 [Full Text] [PDF]  

Alessandro Santini and Gerardo Severino
Sustainable Use and Management of Soils: Arid and Semiarid Regions: Edited by Faz Cano, Oriz Silla, and A.R. Mermut. Advances in GeoEcology 36. Catena Verlag GMBH, 35447 Reiskirchen, Germany. 2005. Hardback, 594 pp. $169.00. ISBN 3-923381-49-2, US ISBN 1-59326-244-2.
Published online 14 January 2009; doi: 10.2136/vzj2008.0019
Vadose Zone J Jan 14 2009: 1313 [Full Text] [PDF]  

Thomas Meixner
The Handbook of Groundwater Engineering: 2nd edition. Edited by Jacques Delleur. CRC Press, Boca Raton, FL 33487. 2006. 1320 pp. $159.95. ISBN 9780849343162.
Published online 14 January 2009; doi: 10.2136/vzj2008.0079br
Vadose Zone J Jan 14 2009: 1314 [Full Text] [PDF]  

ERRATUMBack

Erratum—Vadose Zone Journal, Vol. 7, No. 4, November 2008 Table of Contents
Published online 14 January 2009;
Vadose Zone J Jan 14 2009: 1315–1316 [Full Text] [PDF]  

To see an article, click its [Full Text] link. To review many abstracts, check the boxes to the left of the titles you want, and click the 'Get All Checked Abstract(s)' button. To see one abstract at a time, click its [Abstract] link.

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