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Controls of MacRopore Network Characteristics on Preferential Solute Transport : Volume 11, Issue 8 (12/08/2014)

By Larsbo, M.

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Book Id: WPLBN0004012232
Format Type: PDF Article :
File Size: Pages 38
Reproduction Date: 2015

Title: Controls of MacRopore Network Characteristics on Preferential Solute Transport : Volume 11, Issue 8 (12/08/2014)  
Author: Larsbo, M.
Volume: Vol. 11, Issue 8
Language: English
Subject: Science, Hydrology, Earth
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Koestel, J., Jarvis, N., & Larsbo, M. (2014). Controls of MacRopore Network Characteristics on Preferential Solute Transport : Volume 11, Issue 8 (12/08/2014). Retrieved from

Description: Department of Soil and Environment, Swedish University of Agricultural Sciences (SLU), P.O. Box 7014, 750 07 Uppsala, Sweden. In this study we examined the relationships between macropore network characteristics, hydraulic properties and state variables and measures of preferential transport in undisturbed columns sampled from four agricultural topsoils of contrasting texture and structure. Macropore network characteristics were computed from 3-dimensional X-ray tomography images of the soil pore system. Non-reactive solute transport experiments were carried out at five steady-state water flow rates from 2 to 12 mm h−1. The degree of preferential transport was evaluated by the normalised 5% solute arrival time and the apparent dispersivity calculated from the resulting breakthrough curves. Near-saturated hydraulic conductivities were measured on the same samples using a tension disk infiltrometer placed on top of the columns. Results showed that many of the macropore network characteristics were inter-correlated. For example, large macroporosities were associated with larger specific macropore surface areas and better local connectivity of the macropore network. Generally, an increased flow rate resulted in earlier solute breakthrough and a shifting of the peak concentration towards smaller drained volumes. Columns with smaller macroporosities, poorer local connectivity of the macropore network and smaller near-saturated hydraulic conductivities exhibited a greater degree of preferential transport. This can be explained by the fact that, with only two exceptions, global (i.e. sample-scale) continuity of the macropore network was still preserved at low macroporosities. Thus, for any given flow rate pores of larger diameter were actively conducting solute in soils of smaller near-saturated hydraulic conductivity. With less time for equilibration between the macropores and the surrounding matrix the transport became more preferential. Conversely, the large specific macropore surface area and well-connected macropore networks associated with columns with large macroporosities limit the degree of preferential transport because they increase the diffusive flux between macropores and the soil matrix and they increase the near-saturated hydraulic conductivity. The normalised 5% arrival times were most strongly related with the estimated hydraulic state variables (e.g. with the degree of saturation in the macropores R2 = 0.589), since these combine into one measure the effects of irrigation rate and the near-saturated hydraulic conductivity function, which in turn implicitly depends on the volume, size distribution, global continuity, local connectivity and tortuosity of the macropore network.

Controls of macropore network characteristics on preferential solute transport

Abramoff, D., Magalhaes, P. J., and Ram, S. J.: Image processing with ImageJ, Biophotonics Int., 11, 36–42, 2004.; Beven, K. J., Henderson, D. E., and Reeves, A. D.: Dispersion parameters for undisturbed partially saturated soil, J. Hydrol., 143, 19–43, 1993.; Brusseau, M. L. and Rao, P. S. C.: Modeling solute transport in structured soils – a review, Geoderma, 46, 169–192, 1990.; Dal Ferro, N., Charrier, P., and Morari, F.: Dual-scale micro-CT assessment of soil structure in a long-term fertilization experiment, Geoderma, 204, 84–93, 2013.; Bianchi, M., Zheng, C., Wilson, C., Tick, G. R., Liu, G., and Gorelick, S. M.: Spatial connectivity in a highly heterogeneous aquifer: from cores to preferential flow paths, Water Resour. Res., 47, W05524, doi:10.1029/2009WR008966, 2011.; Jury, W. A. and Roth, K.: Transfer Functions and Solute Movement Through Soil: Theory and Applications, Birkhauser Verlag AG, Basel Switzerland, 226 pp., 1990.; Doube, M., Klosowski, M. M., Arganda-Carreras, I., Cordelieres, F. P., Dougherty, R. P., Jackson, J. S., Schmid, B., Hutchinson, J. R., and Shefelbine, S. J.: BoneJ Free and extensible bone image analysis in ImageJ, Bone, 47, 1076–1079, 2010.; Dyson, J. S. and White, R. E.: The effect of irrigation rate on solute transport in soil during steady water flow, J. Hydrol., 107, 19–29, 1989.; Gerke, H. H. and van Genuchten, M. T.: A dual-porosity model for simulating the preferential movement of water and solutes in structured porous media, Water Resour. Res., 29, 305–319, 1993.; Ghafoor, A., Koestel, J., Larsbo, M., Moeys, J., and Jarvis, N.: Soil properties and susceptibility to preferential solute transport in tilled topsoil at the catchment scale, J. Hydrol., 492, 190–199, 2013.; Haws, N. W., Das, B. S., and Rao, P. S. C.: Dual-domain solute transfer and transport processes: evaluation in batch and transport experiments, J. Contam. Hydrol., 75, 257–280, 2004.; Holland, J. E., White, R. E., and Edis, R.: The relation between soil structure and solute transport under raised bed cropping and conventional cultivation in south-western Victoria, Austral, J. Soil Res., 45, 577–585, 2007.; Horn, R., Taubner, H., Wuttke, M., and Baumgartl, T.: Soil physical properties related to soil structure, Soil Till. Res., 30, 187–216, 1994.; Iassonov, P. and Tuller, M.: Application of segmentation for correction of intensity bias in X-ray computed tomography images, Vadose Zone J., 9, 187–191, 2010.; Jarvis, N. J.: A review of non-equilibrium water flow and solute transport in soil macropores: principles, controlling factors and consequences for water quality, Eur. J. Soil Sci., 58, 523–546, 2007.; Jarvis, N. J., Bergström, L., and Dik, P. E.: Modelling water and solute transport in macroporous soil, II. Chloride breakthrough under non-steady flow, J. Soil Sci., 42, 71–81, 1991.; Jarvis, N. J., Etana, A., and Stagnitti, F.: Water repellency, near-saturated infiltration and preferential solute transport in a macroporous clay soil, Geoderma, 143, 223–230, 2008.; Jarvis, N. J., Moeys, J., Koestel, J., and Hollis, J. M.: Preferential flow in a pedological perspective, in: Hydropedology: Synergistic Integration of Soil Science and Hydrology, edited by: Lin, H., Academic Press, Elsevier B.V., Amsterdam, 75–120, 2012.; Jarvis, N., Koestel, J., Messing, I., Moeys, J., and Lindahl, A.: Influence of soil, land use and climatic factors on the hydraulic conductivity of soil, Hydrol. Earth Syst. Sci., 17, 5185–5195, doi:10.5194/hess-17-5185-2013, 2013.; Kamra, S. K. and Lennartz, B.: Quantitative indices to characterize the extent of preferential flow in soils, Environ. Modell. Softw., 20, 903–915, 2005.; Kim, H., Anderson, S. H., Motavalli, P. P., and Gantzer, C. J.: Compaction effects on soil macropore geometry and related parameters for an arable field, Geoderma, 160, 244–251, 2010.; Knudby, C. and


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