1. April 2002HEC-RAS Version 3.0 FY02Slide 1 of 12 HEC-RAS Version 3.1 Troubleshooting

2. April 2002HEC-RAS Version 3.0 FY02Slide 2 of 12 Troubleshooting with HEC-RAS  The User must carefully review the results to ensure that they adequately represent the study reach and that they are reasonable and consistent.  HEC-RAS software contains several features to assist the user in the development of a model; debugging problems; and review of results.

3. April 2002HEC-RAS Version 3.0 FY02Slide 3 of 12 Troubleshooting Features with HEC-RAS Includes: - Built in data checking. - An Errors, Warnings, and Notes system. - Computational Log Output File. - In addition, the user can use the graphical and tabular output to review the results and check data for reasonableness and consistency.

4. April 2002HEC-RAS Version 3.0 FY02Slide 4 of 12 Built in Data Checking  Checking the Data as it is Entered - Minimum and maximum range checking for variables. - Alpha and numeric data. - Increasing order of station for cross section, bridges deck/roadway, and abutments. - Data consistency checks. - Data deletion warnings. - File management warnings. - Data geometry checks.  Data Checking Before Computations are Preformed - Data completeness. - Data consistency.

5. April 2002HEC-RAS Version 3.0 FY02Slide 5 of 12 Errors, Warnings, and Notes  Errors - when there are problems that prevent the program to complete the run.  Warnings - warnings level message may required the user to take some action. - Cross Sections spaced to far apart. - Cross Sections starting and ending stations not high enough. - Bad Starting Water Surface Elevation. - Bad Cross Section Data.  Notes - provide information to the user about how the program is performing the computations.

6. April 2002HEC-RAS Version 3.0 FY02Slide 6 of 12 Errors, Warnings, and Notes

7. April 2002HEC-RAS Version 3.0 FY02Slide 7 of 12 Log Output Steady Flow Log Output.

8. April 2002HEC-RAS Version 3.0 FY02Slide 8 of 12 Log Output (Continued) Unsteady Flow Log Output.

9. April 2002HEC-RAS Version 3.0 FY02Slide 9 of 12 Reviewing and Debugging  Viewing Graphics 1. Cross Sections Plotting. 2. Profile Plotting. 3. X-Y-Z Perspective Plot.  Viewing Tabular Output  The Occurrence of Critical Depth. 1. Bad Cross Section data. 2. Program can not balance the energy equation. 3. Cross Section spaced too far apart. 4. Wrong flow regime

10. April 2002HEC-RAS Version 3.0 FY02Slide 10 of 12 The End