161-3 New Hydrus Modules for Simulating Preferential Flow, Colloid-Facilitated Contaminant Transport, and Various Biogeochemical Processes in Soils.

See more from this Division: S10 Wetland Soils
See more from this Session: Symposium--Modeling Hydrologic Processes in Soils and Landscapes
Monday, October 22, 2012: 2:00 PM
Duke Energy Convention Center, Room 234, Level 2
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Jiri Simunek, Department of Environmental Sciences, University of California, Riverside, Riverside, CA, Miroslav Sejna, PC Progress, Inc., Prague, Czech Republic, Diederik Jacques, Belgian Nuclear Research Centre SCK.CEN, Mol, Belgium, Guenter Langergraber, Vienna Inst. of Sanitary Eng., BOKU-Univ of Nat Res & App Life Sci, Vienna, Austria, Scott Bradford, USDA-ARS, U.S. Salinity Laboratory, Riverside, CA and Martinus van Genuchten, Department of Mechanical Engineering, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
The capabilities of the HYDRUS (2D/3D) software package have been substantially expanded by new modules accounting for processes not available in the standard HYDRUS version. These new modules include the DualPerm, C-Ride, HP2, Wetland, and Unsatchem. All these modules simulate flow and transport processes in two-dimensional transport domains and are fully supported by the HYDRUS graphical user interface. Additionally, the DualPerm module implements the dual-permeability modeling approach of Gerke and van Genuchten [1993] simulating preferential flow and transport. The C- Ride module implements colloid transport and colloid-facilitated solute transport [Šim¨nek et al., 2006], the latter often observed for many contaminants, such as heavy metals, radionuclides, pharmaceuticals, pesticides, and explosives. HP2 is a two-dimensional alternative of the HP1 module [Jacques and Šim¨nek, 2005], currently available with HYDRUS-1D, that couples HYDRUS flow and transport routines with the PHREEQC geochemical model of Parkhurst and Appelo [1999]. The Wetland module includes two alternative approaches (CW2D of Langergraber and Šim¨nek [2005] and CWM1 of Langergraber et al. [2009]) for modeling aerobic, anaerobic, and anoxic biogeochemical processes in natural and constructed wetlands. Finally, the Unsatchem module simulates the transport and reactions of major ions in a soil profile. A brief description and several demonstrative applications of each module will be presented. Further development of these modules, as well as of several other new modules (such as Overland. Slope Stability, and Meteo/Freezing), is still envisioned. Continued feedback from the research community is encouraged.
See more from this Division: S10 Wetland Soils
See more from this Session: Symposium--Modeling Hydrologic Processes in Soils and Landscapes