Particle transport in macropores of undisturbed soil columns

Jacobsen, O. H.; Møldrup, Per; Larsen, Claus; Konnerup, L; Petersen, L. W.

doi:10.1016/s0022-1694(96)03291-x

Cited by 162 publications

(168 citation statements)

References 28 publications

Supporting

Mentioning

141

Contrasting

Unclassified

Order By: Relevance

“…We thus chose C prim * = 1500 mg L À1 . Studying in situ colloid release from intact soil columns (the same context as in this study), Jacobsen et al [1997] found that the calibrated initial concentration on the macropore wall for particles smaller (respectively greater) than 10 mm varied between 490 and 4000 mg L À1 (respectively between 100 and 180 mg L À1 ). In our experiments, the predominant size of particles in the outflow solution is approximately 0.45 mm [Rousseau et al, 2004b].…”

Section: Initial Estimation Of the Macropore Crust Particle Concentramentioning

confidence: 65%

“…The first alternative is commonly used in the literature [Roy and Dzombak, 1996;Jacobsen et al, 1997;Schelde et al, 2002] but can lead to initial concentration values for some rainfall events that are higher than that of previous events. We adopted the second alternative which is more suitable to describe successive rainfall events.…”

Section: Initial Estimation Of the Macropore Crust Particle Concentramentioning

confidence: 99%

“…The hypothesis of a constant detachment rate together with a first-order kinetics can describe fairly well the mobilization in model porous media with model colloids (e.g., glass beads or washed sand with latexes) or in a few natural systems. This is the case whenever the breakthrough (particle concentration vs. time) curves present a simple pattern, generally an initial peak followed by a decrease to an almost constant level [Schelde et al, 2002;Jacobsen et al, 1997]. However, far more complex breakthrough curves have been reported.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Mobilization and preferential transport of soil particles during infiltration: A core‐scale modeling approach

Majdalani

Michel

Pietro

et al. 2007

Water Resources Research

View full text Add to dashboard Cite

[1] Understanding particle movement in soils is a major concern for both geotechnics and soil physics with regard to environmental protection and water resources management. This paper describes a model for mobilization and preferential transport of soil particles through structured soils. The approach combines a kinematic-dispersive wave model for preferential water flow with a convective-dispersive equation subject to a source/sink term for particle transport and mobilization. Particle detachment from macropore walls is considered during both the steady and transient water flow regimes. It is assumed to follow first-order kinetics with a varying detachment efficiency, which depends on the history of the detachment process. Estimates of model parameters are obtained by comparing simulations with experimental particle breakthrough curves obtained during infiltrations through undisturbed soil columns. Both water flux and particle concentrations are satisfactorily simulated by the model. Particle mobilization parameters favoring both attachment and detachment of particles are related to the incoming solution ionic strength by a Fermi-type function.Citation: Majdalani, S., E. Michel, L. Di Pietro, R. Angulo-Jaramillo, and M. Rousseau (2007), Mobilization and preferential transport of soil particles during infiltration: A core-scale modeling approach, Water Resour. Res., 43, W05401,

show abstract

Section: Initial Estimation Of the Macropore Crust Particle Concentramentioning

confidence: 65%

Section: Initial Estimation Of the Macropore Crust Particle Concentramentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Mobilization and preferential transport of soil particles during infiltration: A core‐scale modeling approach

Majdalani

Michel

Pietro

et al. 2007

Water Resources Research

View full text Add to dashboard Cite

show abstract

“…In spite of that prediction, it was found that more than 40% of Cd penetrated deeper than predicted. It was confirmed in the recent studies that water, solutes, and chemicals adsorbed on the soil particles < 10 5 m can bypass much of the soil matrix via macropores (Camobreco et al 1996, Jacobsen et al 1997, Laegsmand et al 1999.…”

mentioning

confidence: 80%

Cadmium distribution coefficeints and Cd transport in structured soils

Lichner¹,

Čipáková²

2002

PLANT SOIL ENVIRON

View full text Add to dashboard Cite

In the case of cadmium transport via soil macropores, the short-term duration of an interaction between the reactive solute in aqueous phase and soil, as well as cadmium precipitation or adsorption on particles < 10 -5 m should be taken into account. Two distribution coefficients are proposed for predicting the cadmium transport in a structured soil: the matrix distribution coefficient K dm , equal to the equilibrium distribution coefficient K d eq and estimated using the conventional batch technique, and the macropore distribution coefficient K dM , estimated using the modified batch technique. It was found that the conventional approach (using the coefficient K d eq only) would underestimate a penetration of the part of Cd transported in the macropores about 255-times in the loamy-sand soil in Kalinkovo, 20-times in the loam soil in Macov, and 122-times in the clay soil in Jurová in comparison with the approach proposed in this study.

show abstract

“…Além disso, a movimentação do nutriente depende do conteúdo de água no solo (Fesch et al, 1998;Padilla et al, 1999) e da macroporosidade do solo (Kirkby et al, 1997;Jacobsen et al, 1997;Jensen et al, 1998;Shiptalo et al, 2000). Na verdade, a movimentação de um nutriente no solo é resultado da ação simultânea dos fatores supracitados e não da ação isolada de um deles.…”

Section: Introductionunclassified