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HydroCAD® Stormwater Modeling - Since 1986

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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.  You will also find a PDF version of the Owner's Manual in the CD Reference Library.  Last but not least, please see the printed Owner's Manual that is included with each HydroCAD purchase.

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
    3. Release notes for HydroCAD 9.1  HydroCAD 9.0  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 
    11. Software Status Bulletins
    12. International use
  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 
    15. HydroCAD command-line options
    16. Metered (hourly) HydroCAD use
  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 - updated for HydroCAD-9
    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
    47. Modeling porous pavement
    48. Weir calculations
    49. Modeling a floating outlet device
    50. Land-uses analysis and pollutant loading
    51. Underground storage (chamber) wizard
    52. New chamber definitions
    53. Importing CAD watershed data
  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:

  1. General  Support Documents
    1. Frequently Asked Questions
    2. Sending Projects by Email
    3. HydroCAD 5.1 Owner's Manual Supplement
    4. Year 2000 Information
  2. 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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