PC-Progress s.r.o. software

In this program, Hydrus-1D is coupled with the PHREEQC geochemical code (Parkhurst & Appelo 1999) to create a new comprehensive simulation tool, HP1 (acronym for HYDRUS1D-PHREEQC) (Jacques and Šimunek 2005; Jacques et al. 2006; Šimunek et al. 2006, 2008). This code contains modules simulating (1) transient water flow, (2) the transport of multiple components, (3) mixed equilibrium/kinetic biogeochemical reactions, and (4) heat transport in one-dimensional variably-saturated porous media (soils).

Hydrus has been coupled with the PHREEQC geochemical code (Parkhurst & Appelo 1999) to create a new comprehensive simulation tool, HP2 (acronym for HYDRUS-PHREEQC-2D), corresponding to a similar one-dimensional module HP1 (Jacques and Šimunek 2005; Jacques et al. 2006; Šimunek et al. 2006, 2008). HP2 has, apart from the dimensionality (2D), the same capabilities as HP1. HP2 contains modules simulating (1) transient water flow, (2) the transport of multiple components, (3) mixed equilibrium/kinetic biogeochemical reactions, and (4) heat transport in two-dimensional variably-saturated porous media (soils). 

The geochemical UNSATCHEM module (Šimunek and Suarez, 1994; Šimunek et al., 1996) has been implemented into one-, two-, and three-dimensional computational modules of the HYDRUS-1D and HYDRUS (2D/3D) software packages. The geochemical UNSATCHEM module simulates the transport of major ions in variably-saturated porous media, including major ion equilibrium and kinetic non-equilibrium chemistry. The resulting code is intended for predictions of major ion chemistry, along with water and solute fluxes in soils during transient flow. 

Constructed Wetlands (CWs) are engineered water treatment systems that optimize the treatment processes found in natural environments. CWs are popular systems which efficiently treat different kinds of polluted water and are therefore sustainable, environmentally friendly solutions. A large number of physical, chemical and biological processes are simultaneously active and mutually influence each other. As complex systems, CWs have been considered "black boxes" for a long time. During the last few years, two-dimensional models of different complexities have been developed for describing processes in SubSurface Flow (SSF) CWs.

Strongly sorbing chemicals (e.g., heavy metals, radionuclides, pharmaceuticals, pesticides, and explosives) in porous media are associated predominantly with the solid phase, which is commonly assumed to be stationary. However, recent field- and laboratory-scale observations have shown that in the presence of mobile colloidal particles (e.g., microbes, humic substances, clays and metal oxides), colloids can act as pollutant carriers and thus provide a rapid transport pathway for strongly sorbing contaminants. 

The DualPerm Module was developed as a supplemental module of the HYDRUS (2D/3D) software package (Version 2), to model the two-dimensional variably-saturated water movement and solute transport in dual-permeability porous media.

Announcement: Note that the Hydrus-1D software package has been discontinued. While Version 4.17 of HYDRUS-1D will remain available to the public as is, any new developments will from now on be implemented only in Version 5 of HYDRUS. Note that version 4.17 of HYDRUS-1D has recently been fully updated and merged with HYDRUS (2D/3D) (version 3.04) to result in Version 5 of HYDRUS. New features of the one-dimensional part of Version 5 of HYDRUS include new modules PFAS, Cosmic, DPU, Particle Tracking, and C-Ride, as well as updated graphical capabilities, such as two-dimensional z-t graphs of selected variables. More details about Version 5 of HYDRUS.

STANMOD (STudio of ANalytical MODels) is a public domain Windows-based computer software package for evaluating solute transport in porous media using analytical solutions of the convection-dispersion solute transport equation.

PropertiesRETC is a computer program which may be used to analyze the soil water retention and hydraulic conductivity functions of unsaturated soils. These hydraulic properties are key parameters in any quantitative description of water flow into and through the unsaturated zone of soils. The program uses the parametric models of