HYDRUS 2D/3D for Windows, Version 1.xx
HYDRUS is a software package for simulating water, heat, and solute movement in two- and three-dimensional variably saturated media. The software package consists of a computational computer program and an interactive graphics-based user interface. A brief description of HYDRUS is given in the Introduction and Program Description. More detailed information is given in the Technical and User Manuals of HYDRUS.
NEW: Read about HYDRUS in Special Issue of ”Vadose Zone Modeling” Simunek et al., VZJ - 2008, Hydrus and Stanmod models.pdf
Rotating 3D model 
3D-Layered Domain
Program information
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Introduction
Dear HYDRUS users,
Welcome to the website for the HYDRUS software package (version 1.xx), which is a major upgrade and extension of the Hydrus-2D / Meshgen-2D software package originally developed and released by the U.S. Salinity Laboratory in cooperation with the International Groundwater Modeling Center (IGWMC), the University of California Riverside, and PC-Progress. This new HYDRUS package has a completely new graphical environment for both two- and three-dimensional applications, and should provide users with much more comfort than the original Hydrus-2D software package. The new software was released under the name HYDRUS, with different versions (called Levels) covering both the two- and three-dimensional applications.
After having the HYDRUS software in the marketplace for over two years and reaching several hundreds of users worldwide, we believe that the software is fully functional, free of major glitches, and thoroughly tested by both us and our users (we are thankful to them for many useful suggestions for improvements). During this time, we have also significantly expanded both the user manual and the online help. Customers who purchase any HYDRUS version will receive free updates of the purchased version for the following two years. These updates will contain fixed errors and small improvements on the purchased version. Larger and more substantial changes will be available to our customers in the form of paid upgrades to higher versions of the software.
HYDRUS provides users with a great deal of flexibility, as it allows them to acquire only the segment of the software that is most appropriate for their particular application. Table 1 contains a description and pricing of the five available HYDRUS Levels. Users can select software limited to two-dimensional problems, or for both two- and three-dimensional applications, and can also opt for relatively simple or more complex geometries. Users will also be able to upgrade to higher Levels, as well as from older software (Hydrus-2D or Hydrus-2D/Meshgen-2D) to any new HYDRUS Level. Multiple user licenses for up to 20 PCs are double the price of a single license.
You can download a Demo Version of the entire HYDRUS software from our web site (except for the Professional Level) and obtain a license (authorization codes) either directly from us, or from IGWMC (as with the original Hydrus-2D) and other distributors. You can also freely download the Technical Manual, which contains detailed mathematical descriptions of problems that can be addressed with HYDRUS, numerical solutions of the governing equations, descriptions of the computational modules, and many example applications for verification purposes. The User Manual is also free to download, and provides descriptions of the main components of the graphical user interface, as well as many software related details (such as the main dialog windows, commands, and menus). The demo version is installed with selected examples that are described in the Technical manual. Additional examples (e.g., Drip; we will be expanding the library of theses downloadable projects) can be downloaded as well and copied into HYDRUS workspaces as is described in the User Manual.
This web site offers many other tools that may be helpful especially for beginning HYDRUS users. As with Hydrus-1D and Hydrus-2D, we continue to provide the Frequently Asked Questions (FAQ) and Discussion Forums where users can obtain answers to the most common questions as well as being able to share their experience, pose questions, and seek guidance for specific applications. We will continue to actively support these tools. You can also view simple Demos that illustrate the use of the new HYDRUS software, accompanied with brief explanations of particular commands and actions. Additionally, we provide a list of references so that potential HYDRUS users can see examples of ways that HYDRUS has been applied in the past, and existing users can find help with their own applications.
To further improve the software, we invite your feedback about HYDRUS, including any problems and errors that may still be present in this version.
Best regards,
HYDRUS developers