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The Advanced Simulation Capability for Environmental Management (ASCEM) Project for the Department of Energy (DOE) Office of Environmental Management (EM), Office of Soil and Groundwater Remediation is releasing an initial version of the ASCEM toolset for testing and evaluation. ASCEM development is following a risk-based graded approach to meet its Quality Assurance requirements (NQA-1). This graded approach uses three phases of development; this release represents the Research and Development (R&D) branch corresponding to the initial NQA-1 "Basic Phase". This means that this release cannot yet be used for regulatory applications.

The ASCEM Toolset release consists of Akuna (user interface), Amanzi (the simulator), and Agni (a set of tools for controlling the simulator). Web links for downloading Akuna are on this page; links for downloading Amanzi and Agni are available at http://ascemdoe.org. The link will point you to other sites where the files can be downloaded.

In order to download, you must acknowledge that this product will be used for evaluation purposes only and will not be used for regulatory applications.

The release site is currently under construction, and the project team is finishing up testing and development of tutorials. We are planning to conduct user workshops and informal tutorial sessions over the next few months to guide users through tutorial problems and setting up additional test cases as needed. For more information, please contact one of the team members listed below.

To get started and to answer questions, please contact

Installation Notes


Java is no longer bundled with Akuna. You must install the Java JDK 1.7 or higher on your computer in order for Akuna to run. The JDK may be downloaded from

  1. Java JDK 1.7
  2. Java JDK 1.8

All Windows Users

It is strongly recommended that Akuna be installed in a user owned directory, such as My Documents. Installing Akuna in the Program Files directory can potentially cause write permission problems with user-owned files.

Windows 7 Users

If a user has administrative privileges, Java will cause Akuna to set the home directory to C:/Users/Administrator. By default, the user does not have write permissions to this directory, and this status needs to be changed before installing Akuna. Please do the following before installing Akuna:

  1. Browse to the C:/Users/Administrator folder using Windows Explorer.
  2. Double-click the Administrator folder to open, and the user will be prompted for write access.
  3. Select yes.
The user will now have write access to the C:/Users/Administrator directory and Akuna should install successfully. The .akuna directory will be set up within this folder, and will write user information to this file as Akuna is executed.

Windows 8 Users

The Akuna software is not currently supported on Windows 8.

VisIt Download

VisIt is a visualization software package that can read the spatial output files generated by the ASCEM simulator, Amanzi. Visualization of Amanzi's output files can be performed with other visualization tools that either 1) read the HDF5 native format; or 2) read translated HDF5 files to an appropriate file format using the HDF5 toolset (www.hdfgroup.org). Although not currently integrated, VisIt will be tightly integrated with Akuna in the near future.

VisIt can be downloaded at: https://wci.llnl.gov/codes/visit/home.html

Last Updated: September 2013
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