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EFH-2 Engineering Handbook Chapter 2

EFH-2 Engineering Handbook Chapter 2. Basic Input / Output for Connecticut. Lesson Objectives. Upon completion of this lesson, you will be able to: Start the EFH-2 program and navigate through the various windows Develop input data for single sub-area watersheds

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EFH-2 Engineering Handbook Chapter 2

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  1. EFH-2 Engineering Handbook Chapter 2 Basic Input / Output for Connecticut

  2. Lesson Objectives Upon completion of this lesson, you will be able to: • Start the EFH-2 program and navigate through the various windows • Develop input data for single sub-area watersheds • Input sub-area data into EFH-2 • Run EFH-2 • Interpret Output

  3. Starting EFH-2andProgram Windows

  4. From Windows Explorer: Starting the Program OR Desktop Shortcut:

  5. Welcome to EFH-2

  6. Help for Welcome to EFH-2

  7. EFH-2 Main Window MenuBar ButtonsBar Tabs Boxes

  8. File Menu New or button Open or button Recalculate Save or button Printorbutton Exit

  9. Edit Menu Cut or button Copy or button Paste or button

  10. View Menu Toolbar

  11. Tools Menu Average Slope Calculator or button. Hydrologic Soil Groups button.

  12. Help Menu Contents or button.

  13. EFH-2 Main Window Buttons Paste New Print Cut Slope Calculator Open Help Copy Hydrologic Soil Group Save

  14. Introduction Tab

  15. Basic data Tab

  16. Rainfall/Discharge data Tab

  17. RCN (Runoff Curve Number) Tab

  18. Input file “example.efm” Rainfall file “COUNTY.CT” Rainfall Distribution file “type.rf” Type I, IA, II, III & DMV For Northeast states, draft distributions, Type II and Type III are in the file “type.rf” Soils file “SOILS.hg” File Management within EFH-2

  19. EFH-2 Printed Output

  20. EFH-2: Input File

  21. Draft Rain Dist Regions

  22. Zoom to Connecticut

  23. EFH-2: Rainfall Data County.CT

  24. Standard Rainfall Distribution Types, CCE version • Type I • Type IA • Type II • Type III • Type DMV

  25. Draft Rainfall Distribution types for northeast type.rf NE_A NE_B NE_C Type II Type III

  26. EFH-2 User’s Manual http:/directives.sc.egov.usda.gov/viewDirective.aspx?hid=2517

  27. Entering Data, Running the Program and Interpreting Output Demo #1 Single Sub-area Watershed with Minimum Data Requirements

  28. Demo #1 • A large lot subdivision is planned in the watershed drainage area shown on the upcoming topo map and aerial photo. • There are no county level stormwater detention ordinances, but the county is interested in knowing how much increased runoff would occur because of the development.

  29. Demo #1 • The developer has been considering this project for a number of years and, using EFH-2, previously determined the runoff curve number and time of concentration as shown on the following slide. • Determine the runoff volume and peak discharge for the current (existing) watershed conditions.

  30. Demo #1

  31. Demo #1

  32. EFH-2 Main Window

  33. Basic data Window

  34. Basic data Window

  35. Basic data Window

  36. Basic data Window

  37. Rainfall/Discharge Window

  38. Rainfall/Discharge Window

  39. Results • Find the peak discharge and runoff volumes for the 10-year and 100-year storm events.

  40. Click the button (or File-Save from the main window menu bar) Specify location Specify file name Click Save button Save an EFH-2 Data File

  41. Print Output

  42. Summary • Start the EFH-2 program and navigate through the various windows • Input sub-area data into EFH-2 • Run EFH-2 • Interpret Output

  43. Summary Questions ?

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