This is a fully functional version of AQUA3D Version 4.0 except you cannot insert more than 250 nodes. Make a directory called AQUA3D and download demo. Unzip aquademo.zip using WinZip and select Actions/Install or double-click on setup.exe. This will install Aqua3DWin in your C:\Programs directory. In your C:\Programs\Aqua3DWin directory is a Readme.doc file. Chapters 11 and 12 in Help are Tutorials for AQUA3D flow models and AQUA3D transport models.