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Focus Topic: Vadose Zone Models

Vadose Zone Journal has, since its inception, been an outlet for manuscripts in which numerical models have been used to support research on many different topics. This focus topic features recent articles in which numerical models are used in support of research in various hydrological, environmental, and ecological studies.
Review: Recent Developments and Applications of the HYDRUS Computer Software Packages
Jiří Šimůnek, Martinus Th. van Genuchten, and Miroslav Šejna
Review: Modeling Soil Processes: Review, Key Challenges, and New Perspectives
H. Vereecken, A. Schnepf, J.W. Hopmans, M. Javaux, D. Or, T. Roose, J. Vanderborght, M.H. Young et al.
Thomas Maurer and Horst H. Gerke
The development pathway of a landscape depends to a degree on the initial spatial distributions of mineral and organic components. The interaction between structures and ecohydrological processes duri...more
S. Baram, V. Couvreur, T. Harter, M. Read, P.H. Brown, M. Kandelous, D.R. Smart and J.W. Hopmans
Large spatial and temporal variability in water flow and N transport dynamics poses significant challenges to accurately estimating N losses form orchards. A 2-yr study was conducted to explore nitrat...more
Jannis Groh, Jan Vanderborght, Thomas Pütz and Harry Vereecken
A dynamic tension-controlled bottom boundary of lysimeters allows observing water and matter fluxes in lysimeters that are close to natural field conditions, as pressure heads at the lysimeter bottom...more
Jiří Šimůnek, Martinus Th. van Genuchten and Miroslav Šejna
The HYDRUS-1D and HYDRUS (2D/3D) computer software packages are widely used finite-element models for simulating the one- and two- or three-dimensional movement of water, heat, and multiple solutes in...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
Zhao Liu, Yuanyuan Zha, Wenyuan Yang, Yi-Ming Kuo and Jinzhong Yang
Based on the stochastic perturbation approach, a large-scale unsaturated flow model was derived in which the saturated hydraulic conductivity (Ks) is assumed to be a random field. The corresponding ef...more
Siul Ruiz, Isabelle Straub, Stanislaus J. Schymanski and Dani Or
Recent mechanical models of soil penetration by earthworms and plant roots based on penetration-cavity expansion were tested using cone penetration measurements at scales compatible with the sizes of...more
Luwen Zhuang, S. Majid Hassanizadeh, Martinus Th. van Genuchten, Anton Leijnse, Amir Raoof and Chaozhong Qin
When two soil samples with the same hydraulic properties but different initial water saturations are brought into contact, water will redistribute horizontally between the samples until some equilibri...more
Behzad Ghanbarian and Hugh Daigle
Porous materials such as rocks, soils, and peats are typically complex mixtures built up of more than one component, with intrinsic permeabilities that depend on factors such as pore shape and surface...more