What you can do with the evaluation licence

This note refers to the free trial version of HYSIM. This version has two limitations which do not apply to the full version:

1. A maximum of 5 years of data can be used (in HYSIM there is no limitation).
2. Only one sub-catchment can be used (in HYSIM a wide variety of multiple catchments and/or multiple hydrological zones is possible).

There are three files you can download:
1. HYSIM.ZIP. This has three files, HYSIM.CAB, SETUP.EXE and SETUP.LST. There are the files needed to install HYSIM.
2. HYSIMDoc.ZIP. This is the HYSIM User Manual.
3. Trial.zip. This is data for testing HYSIM.

The trial data

The data set has the following files:

The trial data set is in a zipped file call test.zip.

• Start HYSIM
• The first time you run HYSIM you will get the message "Presently using the application directory for log messages. Change it?". You should click on "Yes" and select a suitable folder. (For quality assurance purposes HYSIM keeps a log of everything it does. If the files are written to the application folder these will have to be deleted manually if you uninstall HYSIM).You can also resize the screen to suit your computer.
• Click on the Icon for Edit. Click on File/Open. Select trial.crf. You can now see the rainfall data. You can move around using the keyboard arrow keys and PageUp and PageDown keys. Click on File/Close to exit the editor.
• Click on the Icon for Parameters. Click on File/Open. Select trial.par. You can now see the parameter file. Click on the buttons for Hydraulics and Hydrology to see the parameter values. Click on File/Close to exit the parameter editor.
• Click on the Icon for Graphics. Click on File/Open. Select trial.dfl. You can now see a graph of the first year's flow. Click on the arrow buttons on screen to see data for other years.

Before you can run the model HYSIM requires a project file, which identifies where the individual data files are located..

• Click on the Icon for Project.
• Open the file trial.hpj in your chosen folder. This file has references to the location of the data files used for a HYSIM project, including the folder used. As the folder you use will not be the same as the one originally used you will get the message "Parameter file not found. Are all the data files in the same folder?". Click on "Yes". You will now get the message "Do you want HYSIM to correct the project file?". Click on "Yes". Click on File/Save and over-write the original project file.
• Click on File/Close.
• Click on the icon for model.
• Click on File/Open existing project file.
• Click on Run/Start. The model will now run and you will get a summary of the rseults.
• Click on the "graphics" icon.
• Click on File/Open HYSIM file, select "Simulated and observed flow (*.GSM)" and open trial.gsm. This will give a plot of simulated and observed flow.

• Select different forms of output (print options) and choose Moisture storages and Moisture transfers. Run the model. Click graphics and select one the files you have just chosen (extensions GMT and GST). You can now look at the internal movement of moisture (GMT) and storage (GST) within HYSIM.
• Enter the Parameter editor and change the values. Run the model and look at the differences in results.
• Change the parameter values a bit more and use the calibration options.
• To get a better simulation change the Pore Size Distribution Index to one appropriate for a sandy soil and the groundwater recession rate to something closer to that observed. (You will need to look at the manual for details). Then run the multiple parameter calibration option. You should now get a much better fit. The "observed" flow is actually a simulated flow record. The file answer.par is the one used to generate the original flow file so you can check how close you have got.
• You can now use HYSIM to set up and calibrate data for your own catchment. The only limitation is that you cannot test the multiple catchment options and you cannot use more than 5 years data.

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