Software can be requested from the IGWMC office at the Colorado School of Mines, Golden, Colorado by phone, fax, mail, and e-mail. Contact:

IGWMC
Colorado School of Mines
1500 Illinois Street
Golden, Colorado 80401-1887
Phone: (303) 273-3103
FAX: (303) 384-2037
e-mail:igwmc@mines.edu

Contact us for shipping details and cost. Unless specified otherwise, orders are shipped 3-day ground via United States Postal Service to the street address provided. IGWMC accepts credit cards (MasterCard, Visa, or American Express), checks, or purchase orders as payment. Prepayment is required for all orders.

The following programs are included on this CD:

3DADE, CFITIM, CFITM, CHAIN, CHAIN_2D, CXTFIT, HYDRUS-1D, HYDRUS-2D/MESHGEN-2D (Demo Version), N3DADE, RETC, ROSETTA, STANMOD, SWMS-2D, SWMS-3D, UNSCHEM, UNSCHEM2, and UNSODA

3DADE: a program evaluating analytical solutions for two- and three-dimensional equilibrium solute transport.

CFITIM: a program for estimation of equilibrium and non-equilibrium solute transport parameters from miscible displacement experiments in a steady-state, uniform flow field using a pulse-type or continuous source. Depending upon the exact form of the transport, the program allows up to five different parameters to be estimated. Traditionally, a two-parameter partial differential equation has been used to describe the one-dimensional convective-dispersive transport of chemicals in soils. The parameters in this equation include the dispersion coefficient and a distribution coefficient, the latter accounting for interactions between the chemical and the solid phase of the soil. For linear equilibrium adsorption the resulting model is relatively easy to use. To more adequately simulate the effects observed in experiments, more complex conceptual models need to be used. These models are all based on the assumption that, either for physical or chemical reasons, adsorption does not proceed at an equal rate in all parts of the soil medium. The resulting transport equations contain several parameters which must be quantified before actual predictions can be made in the field. Estimates for these parameters can be obtained by analyzing effluent curves from column displacement experiments using least squares. Depending upon the exact form of the transport model, the program allows up to five different parameters to be estimated simultaneously.

CFITM: Predictions of solute transport in the field are generally based upon convective-dispersive type transport equations. The one-dimensional form of this equation contains two parameters which must be determined beforehand. They are the dispersion coefficient and a distribution coefficient, the latter acounting for adsorption or exchange between the liquid and solid phases. Both coefficients can be obtained by fitting an analytical solution of the one-dimensional convective-dispersive transport equation to observed column effluent data. CFITM describes a non-linear least-squares curve-fitting computer model which may be used for that purpose. The program considers analytical solutions of the convection-dispersion equation for both finite and semi-infinite porous media.

CHAIN: a computer program for solving analytical solutions for one-dimensitonal solute transport involving sequential first-order decay chain reactions. Several examples illustrate the use of this program for problems involving the migration of radionuclide decay chains, or the simultaneous movement of various interacting nitrogen or pesticides species.

CHAIN_2D: a computer program for simulating two-dimensional variably-saturate water flow, hear movement, and the transport of solutes involved in sequential first-order decay reactions. The flow equation incorporates a sink term to account for water uptake by plant roots. The water flow part of the model can deal with prescribed head, gradient, and flux boundaries, as well as boundaries controlled by atmospheric conditions. The program considers free drainage boundary conditions as well as a simplified representation of nodal drains using results electric analog experiments is also included. The heat transport equation considers transport due to conduction and convection with flowing water. The solute transport equations consider convective-dispersive transport in the liquid phase, as well as diffusion in the gaseous phase. The transport equations also include provisions for nonlinear non-equilibrium reactions between the solid and liquid phases, linear equilibrium reactions between the liquid and gaseous phases, zero-order production, and two first-order degradation reactions: one which is independent of other solutes, and one which provides the coupling between solutes involved in the sequential first-order decay reactions. The program may be used to analyze water and solute movement in unsaturated, partially saturated, or fully saturated porous media.

CXTFIT: a computer program for estimating solute transport parameters using a nonlinear least-squares parameter estimation. The program may also be used to solve the direct or forward problem to determine the concentration as a function of time and/or position. Three different one-dimensional transport models are included:
(i) the conventional equilibrium convection-dispersion equation (CDE) ;
(ii) the chemical and physical non-equilibrium CDE’s ;
(iii) a stochastic stream tube model based upon the local-scale CDE, and assuming either equilibrium or non-equilibrium transport.
The program comes with 22 examples demonstrating various applications of the CXTFIT code.

HYDRUS-1D: a software package for simulating water flow, heat and solute movement in one-dimensional variably saturated media. The software consists of the HYDRUS (version 7.0) computer program, and the HYDRUS1D interactive graphics-based interface. The HYDRUS 7.0 code numerically solves the Richards' equation for variably-saturated water flow and convection-dispersion type equation for heat and solute transport. The Flow equation incorporates a sink term to account for water uptake by plant roots. The Heat transport equation considers transport due to conduction and convection with flowing water. The Solute transport equations consider convective-dispersive transport in the liquid phase as well as diffusion in the gaseous phase. The transport equations also include provisions for nonlinear non-equilibrium reactions between the solid and liquid phases, linear equilibrium reactions between the liquid and gaseous phases, zero order production, and two first order degradation reactions: One which is independent of other solutes, and one which provides the coupling between solutes involved in sequential first-order decay reactions. In addition, physical non-equilibrium solute transport can be accounted for by assuming a tow-region, dual-porosity type formulation which partition the liquid phase into mobile and immobile regions. The program may be used to analyze water and solute movement in unsaturated, partially saturated, or fully saturated porous media. The flow region may be composed of non-uniform soils. Flow and transport can occur in the vertical, horizontal, or a generally inclined direction. The water flow part of the model can deal with prescribed head and flux boundaries; boundaries controlled buy atmospheric conditions, as well as free drainage boundary conditions. The governing flow and transport equations are solved numerically using Galerkin-type linear finite element schemes. This version 7.0 of HYDRUS also includes a Marquardt-Levenberg type parameter optimization algorithm for inverse estimation of a variety of soil hydraulic and-or solute transport and reaction parameters from measured transient of steady-state flow and-or transport data.

HYDRUS-2D: a software package for simulating water flow, heat and solute movement in two-dimensional variably saturated media. The software package consists of the HYDRUS2 computer program, and the interactive graphics-based user interface HYDRUS2D. HYDRUS2 is the two-dimensional version of HYDRUS 7.0 as described above. HYDRUS-2D can handle flow regions delineated by irregular boundaries. The flow region itself may be composed of non-uniform soils having an arbitrary degree of local anisotropy. Flow and transport can occur in the vertical plane, the horizontal plane, or in a three-dimensional region exhibiting radial symmetry about the vertical axis. HYDRUS-2D includes the MESHGEN2D program for designing general domain geometry through the generation of an unstructured finite element mesh specifically designed for variably-saturated subsurface flow/transport problems. Similarly as for HYDRUS-1D, HYDRUS-2D implements a Marquardt-Levenberg type parameter estimation technique for inverse estimation of selected soil hydraulic and-or solute transport parameters.

N3DADE: a program evaluating analytical solutions for two- and three-dimensional non-equilibrium solute transport.

RETC: (RETention Curve) is a window-based computer program to describe or predict the water retention and hydraulic conductivity functions of unsaturated soils. The program considers both the Brooks-Corey and van Genuchten unsaturated soil hydraulic functions. The software includes several examples illustrating different applications of RETC.

ROSETTA: Rosetta offers five PTFs that allow prediction of the hydraulic properties with limited or more extended sets of input data. This hierarchical approach is of a great practical value because it permits optimal use of available input data. The models use the following hierarchical sequence of input data

Soil textural class
Sand, silt and clay percentages
Sand, silt and clay percentages and bulk density
Sand, silt and clay percentages, bulk density
and a water retention point at 330 cm (33 kPa).
Sand, silt and clay percentages, bulk density
and water retention points at 330 and 15000 cm (33 and 1500 kPa)

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

SWMS-2D: a computer program for simulating two-dimensional water flow and solute transport in variably saturated media. The program numerically solves the Richards' equation for saturated-unsaturated water flow and the convection-dispersion equation for solute transport. The flow equation incorporates a sink term to account for water uptake by plant roots. The transport equation includes provisions for linear equilibrium adsorption, zero-order production, and first-order degradation. The program may be used to analyze water and solute movement in unsaturated, partially saturated, or fully saturated porous media.

SWMS-3D: a computer program for simulating water and solute movement in three-dimensional variably saturated media.

UNSCHEM: a software package for simulating water, heat, carbon dioxide and solute movement in one-dimensional variably saturated media.

UNSCHEM2: a two-dimensional finite element code for modeling major ion equilibrium and kinetic non-equilibrium chemistry in variably saturated porous media.

UNSODA: a database of unsaturated soil hydraulic properties.