Simulating nonequilibrium movement of water, solutes and particles using hydrus - a review of recent applications

Jiří Šimůnek, J. Maximilian Köhne, Radka Kodešová and Miroslav Šejna
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Jiří Šimůnek: Department of Environmental Sciences, University of California, Riverside, USA
J. Maximilian Köhne: Department of Soil Physics, Helmholtz Centre for Environmental Research, Halle (Saale), Germany
Radka Kodešová: Department of Soil Science and Geology, Czech University of Life Sciences in Prague, Prague, Czech Republic
Miroslav Šejna: PC-Progress, Prague, Czech Republic$2

Soil and Water Research, 2008, vol. 3, issue SpecialIssue1, S42-S51

Abstract: Water and contaminants moving through the vadose zone are often subject to a large number of simultaneous physical and chemical nonequilibrium processes. Traditional modeling tools for describing flow and transport in soils either do not consider nonequilibrium processes at all, or consider them only separately. By contrast, a wide range of nonequilibrium flow and transport modeling approaches are currently available in the latest versions of the HYDRUS software packages. The formulations range from classical models simulating uniform flow and transport, to relatively traditional mobile-immobile water physical and two-site chemical nonequilibrium models, to more complex dual-permeability models that consider both physical and chemical nonequilibrium. In this paper we briefly review recent applications of the HYDRUS models that used these nonequilibrium features to simulate nonequilibrium water flow (water storage in immobile domains and/or preferential water flow in structured soils with macropores and other preferential flow pathways), and transport of solutes (pesticides and other organic compounds) and particles (colloids, bacteria and viruses) in the vadose zone.

Keywords: nonequilibrium flow and transport; physical nonequilibrium; chemical nonequilibrium; numerical models; preferential flow; reactive transport; HYDRUS; review of recent applications (search for similar items in EconPapers)
Date: 2008
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Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlswr:v:3:y:2008:i:specialissue1:id:1200-swr

DOI: 10.17221/1200-SWR

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