HydroCAD^® Stormwater Modeling - Since 1986

HydroCAD-8.5 has been released!  To check your version and read about update options, select Check for Update on the HydroCAD Help menu.

We strongly recommend that everyone run the tutorial that is offered when you start HydroCAD.  You can also run the tutorial by selecting Tutorial on the HydroCAD Help menu.  The tutorial is loaded with important tips and techniques you'll use all the time.  Most of the HydroCAD Owner's Manual is also included in the built-in help system, and answers to most questions can be found by clicking the "Help" button on the related form.  HydroCAD-7 and HydroCAD-8 owners can also refer to the documents in the bonus CD Reference Library.

Would you like to discuss your question with other HydroCAD users?  Visit our public support forum on Eng-Tips.com

1. General Support Documents
   1. How to use the HydroCAD CD Reference Library
   2. Frequently Asked Questions (Updated for HydroCAD-8.  Please read!)
   3. Release notes for HydroCAD 8.5  HydroCAD 8.0  HydroCAD 7.1  HydroCAD 7.0   HydroCAD 6.1
   4. General Tips (A Tip-of-the-month compilation)
   5. Units of Measure (Rounding, English, Metric, & custom units)
   6. Sending Projects by Email
   7. HydroCAD Licensing and Registration
   8. HydroCAD Training, including live seminars and self-training materials.
   9. Where is my version and serial number?
   10. Message list 
2. Installation and Operation
   1. Hardware and System Requirements
   2. Download Tips
   3. Installation tips
   4. Startup Problems
   5. Understanding the "User Count"
   6. Windows Printing Tips
   7. Exporting Data
   8. Importing Data
   9. HydroCAD File Types
   10. File Compatibility (between different versions)
   11. Understanding the Capacity of Your System
   12. Using a Link to Model a Large Watershed
   13. Multi-event links: How they work
   14. Data Exchange 
3. Modeling Issues
   1. How do I model my site?
   2. Overfilled Pond Storage
   3. Inflow Area and Depth
   4. Common Runoff Issues  Rainfall Issues
   5. Unit Hydrograph selection and the Peak Factor
   6. Using the Rational Method    IDF Files
   7. Analyzing the "First Inch"
   8. Modeling a Roof or Roof Drains
   9. Runoff, Inflow, or Outflow Lower Than Expected
   10. Results not as expected
   11. Results different from other software
   12. Outlet Device Calculations
   13. How Do I Add Two Hydrographs?
   14. Modeling an Elliptical or Arch Pipe
   15. Pond storage calculations & embedded storage
   16. Using stormwater storage chambers
   17. Understanding Exfiltration (for dry wells, infiltration, etc.)
   18. Catch basins & storm sewers
   19. Pipes & culverts
   20. Automatic pipe and culvert sizing
   21. Tailwater, Backwater, Coupled Ponds, & Pressure Flow
   22. Using the new Dynamic Storage-Indication Method
   23. Using the simultaneous routing procedure
   24. Agency Acceptance of HydroCAD (Local, state, and federal issues.)
   25. Comparison with TR-20 and TR-55
   26. Automatic TR-20 data import
   27. Swamp effects and the TR-55 Pond/Swamp Factor
   28. Modeling overland flow
   29. Using the Pond Sizing report
   30. Subcatchment FAQ
   31. Reach FAQ
   32. Pond FAQ
   33. Link FAQ
   34. Modeling Vortex Control Valves
   35. Modeling Pumps
   36. Detention time calculations
   37. Understanding the Peak Flow
   38. Curve Number issues
   39. Soils Information
   40. Time-of-Concentration
   41. Muskingum-Cunge Reach Routing
   42. Pervious/impervious runoff issues
   43. Modeling a dam break
   44. Modeling check-dams
   45. Comparing hydrographs (including pre/post conditions)
   46. Modeling rain gardens
4. Modeling Examples (With photos!)
   1. Sample Pond #1: Earth detention pond with riser outlet
   2. Sample Pond #2: Flood control pond with concrete control structure
   3. Sample Pond #3: U-shaped detention pond with concrete riser
   4. Sample Culvert #1: Inlet control in action
   5. Sample Weir #1: Sharp crested vs. broad crested weirs
   6. Sample Weir #2: Modeling compound weirs with the weir rise parameter
   7. Sample Site #1: A project with no natural outlets
5. For Further Assistance
   1. Visit the Hydrology Library
   2. Search Entire Web Site For Key Words
   3. HydroCAD Forum on eng-tips.com
   4. Submit a Question To Technical Support (If you can't find the answer above.)
   5. Suggest a New Program Feature
   6. Subscribe to Our Mailing List (Get free Support Letters and other news.)
   7. Premium Support Plans (Toll-free modeling advice, automatic program updates, etc.)
   8. Early Release Software

For HydroCAD version 5.1 and earlier:

16. General  Support Documents
    1. Frequently Asked Questions
    2. Sending Projects by Email
    3. HydroCAD 5.1 Owner's Manual Supplement
    4. Year 2000 Information
17. Installation and Operation
    1. Installing HydroCAD
    2. Starting HydroCAD
    3. Opening a Project (Can't find your project?)
    4. Shutting down HydroCAD
    5. Mouse Problems? (Installation, sensitivity, etc.)
    6. Printing Tips and Problems
    7. Exporting Reports or Graphics
    8. Windows Operating Tips
    9. Enhancement Pack Technical Notes
    10. Error Message List

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