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Focus Topic: Transport of chemicals in the vadose zone

critical zone

Focus Topic: Transport of chemicals in the vadose zone

Chemical processes and the transport of substances in soils is vital for the functioning of living organisms systems in soils. It also plays an important role for nutrient uptake of plants, the fate of pesticides and fertilizers, and the transformation and transport behavior of contaminants in soil. In general, transport and chemical processes in the vadose zone play a role in a broad range of studies. We collect here only papers with a clear focus on observations or modeling of coupled transport and chemical transformation processes of substances in soils. 

 
S. Guillon, C. Gréau and E. Pili
Long-term continuous measurements of gas concentrations in the vadose zone are required to identify gas transport processes. A magnetic sector mass spectrometer, originally developed for industrial pr...more
 
Clemens J.M. Cremer, Insa Neuweiler, Michel Bechtold and Jan Vanderborght
We investigate the effect of dynamic boundary conditions on solute transport in unsaturated, heterogeneous, bimodal porous media. Solute transport is studied with two-dimensional numerical flow and tr...more
 
H. Vereecken, A. Schnepf, J.W. Hopmans, M. Javaux, D. Or, T. Roose, J. Vanderborght, M.H. Young, W. Amelung, M. Aitkenhead, S.D. Allison, S. Assouline, P. Baveye, M. Berli, N. Brüggemann, P. Finke, M. Flury, T. Gaiser, G. Govers, T. Ghezzehei, P. Hallett, H.J. Hendricks Franssen, J. Heppell, R. Horn, J.A. Huisman, D. Jacques, F. Jonard, S. Kollet, F. Lafolie, K. Lamorski, D. Leitner, A. McBratney, B. Minasny, C. Montzka, W. Nowak, Y. Pachepsky, J. Padarian, N. Romano, K. Roth, Y. Rothfuss, E.C. Rowe, A. Schwen, J. Šimůnek, A. Tiktak, J. Van Dam, S.E.A.T.M. van der Zee, H.J. Vogel, J.A. Vrugt, T. Wöhling and I.M. Young
The remarkable complexity of soil and its importance to a wide range of ecosystem services presents major challenges to the modeling of soil processes. Although major progress in soil models has occur...more
 
R.H. Ellerbrock and H.H. Gerke
Soil organic matter (SOM) can be affected by adopted soil management options. However, it is unclear how mineral and organic fertilization could change the amount and composition of SOM. The objective...more
 
Jing Yan, Volha Lazouskaya and Yan Jin
Mobilization of soil colloids has attracted much research attention because of colloids’ potential to facilitate transport of strongly sorbing constituents (e.g., contaminants, pesticides, and nutri...more
 
Xin Ding, B. Mack Kennedy, William C. Evans and David A. Stonestrom
The noble gases, which are chemically inert under normal terrestrial conditions but vary systematically across a wide range of atomic mass and diffusivity, offer a multicomponent approach to investiga...more
 
Gurpal S. Toor and J. Thomas Sims
Application of phosphorus (P) inputs to soils saturated with legacy P can significantly increase the risk of P leaching and deteriorate water quality. Our objectives were to quantify the effect of soi...more
 
Mriganka De and Gurpal S. Toor
Onsite wastewater treatment systems (OWTS), commonly known as septic systems, are increasingly recognized as a potential source of nitrogen in the shallow groundwater. Our objective was to investigate...more
 
Roy Elkayam, Alex Sopliniak, Guy Gasser, Irene Pankratov and Ovadia Lev
Soil aquifer treatment (SAT) is increasingly considered to be a favorable polishing method before the use of secondary or tertiary wastewater effluents for unrestricted irrigation or disposal to the s...more
 
Antonio Coppola, Alessandro Comegna, Giovanna Dragonetti, Horst H. Gerke and Angelo Basile
Soil fissures and small cracks develop as a result of matrix shrinkage; upon wetting, the soil matrix volume increases by swelling, thereby partially closing the cracks and fissures. We propose a mode...more