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Steps for Downloading the Model
The three workbooks (wet, dry and normal years) are yoked together with a simple menu-driven graphical user
interface (GUI). In addition, the spreadsheet models are stored as zipped Microsoft Excel files using WinZip
compression software. An evaluation version of WinZip may be downloaded at
There are two versions of the model which can be selected for each of the three hydrologic conditions.
The differences between the versions lie in the manner in which the ungaged reach gains and losses are
determined. To determine which of the two versions to select please read the following
Model Version Selection Memorandum.
- Once the model is selected, download the model by clicking on the file name and saving to your
local directory. Depending on the browser this may entail only responding to a prompt, or choosing
"Save As..." from the browser file menu.
- Once on the local disk, double click the zipped file to extract the Excel Workbooks.
- In Microsoft Excel, open the Bear River Model file. From this graphical user interface the wet,
normal, or dry year models may be selected.
- For further information on the use of the models please refer to the tutorial included in the workborks.
For additional information, including both a user's guide and engineering documentation of the model, please
refer to the Task 3B Surface Water Data Synthesis and Spreadsheet Model Development Technical Memorandum.
* Please note that these files are in read only format. Any changes to the model made by the user
may change the results and must be saved with a new file name.
** For Windows XP users - Due to additional security levels, XP users may have to manually
change their security levels. If you receive a message when opening Microsoft Excel that reads as follows:
"Macros in this workbook are disabled because the security level is high..." click OK and perform the following
routine: Under the Tools menu, click on Macro then Security. Change the Security Level to Medium, this will enable
the user to go to the Spreadsheet Model Main Menu.