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WinTR-55 Small Watershed Hydrology

WinTR-55 Small Watershed Hydrology. Intermediate WinTR-55 Training Modeling Multiple Sub-area Watersheds. Course Outline. Intermediate WinTR-55 Training Multiple Sub-area Watersheds Sub-area / Reach Concepts Developing data for Multiple Sub-area Watersheds

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WinTR-55 Small Watershed Hydrology

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  1. WinTR-55Small Watershed Hydrology Intermediate WinTR-55 Training Modeling Multiple Sub-area Watersheds

  2. Course Outline Intermediate WinTR-55 Training • Multiple Sub-area Watersheds • Sub-area / Reach Concepts • Developing data for Multiple Sub-area Watersheds • Entering data and running the program • Interpreting Output WinTR-55 Multiple Sub-Areas

  3. Lesson Objectives Upon completion of this lesson you will be able to : • Describe the relationship between reaches and sub-areas in the modeling process • Develop input data for multiple sub-area watersheds and stream reaches • Input stream reach data into WinTR-55 • Run WinTR-55 • Interpret Output WinTR-55 Multiple Sub-Areas

  4. Sub-Area and Reach Concepts

  5. Watershed- system of sub-areas and reaches Sub-areas- watersheds that generate runoff Reaches- represent watershed flow paths (stream channels) or structures B A C Reach 1c D Reach 2e E Sub-area/Reach Concepts WinTR-55 Multiple Sub-Areas

  6. Sub-area/Reach Concepts • Watershed - system of sub-areas and reaches • Sub-areas- generate runoff • feed into the upstream end of reaches • Reachesor Routing Elements- represent watershed stream flow paths or structures • ChannelRouting elements - Stream Reaches • StructureRouting elements - Reservoir/Structure Reaches • Watershed Outlet- downstream end of the watershed (required for all watersheds) WinTR-55 Multiple Sub-Areas

  7. Sub-area A Reach 1a(storage routing) Sub-area B Sub-area C Reach 2c (Reach Routing) Legend: Storage Area Sub-Area Inflow Points Outlet Schematics WinTR-55 Multiple Sub-Areas

  8. Data Requirements • Identification Data - User, State, and County • Dimensionless Unit Hydrograph • Storm Data – for specific County/State • Sub-area Data - Name, flows to reach/outlet, area, runoff curve number, & time of concentration • Reach Data -Name, receiving reach/outlet, reach length, Manning’s “n”, friction slope, bottom width, average side slopes WinTR-55 Multiple Sub-Areas

  9. Adding Sub-areas

  10. Adding Sub-areas WinTR-55 Multiple Sub-Areas

  11. Adding Stream ReachesandDeveloping Stream Reach Data

  12. Adding Stream Reaches • WinTR-55 Main Window • Reach Data Window • Reach Flow Path Window WinTR-55 Multiple Sub-Areas

  13. County Road Branch Sub-area (stream embedded in sub-area) Upper Main Creek Sub-area (stream embedded in sub-area) Upper East Trib Sub-area (stream embedded in sub-area) Upper West Branch Sub-area(stream embedded in sub-area) Middle Main Creek Sub-area Main Stem 1 Reach Lower East Trib Sub-area East Reach Lower West Branch Sub-area West Reach Lower Main Creek Sub-area Main Stem 2 Reach OUTLET Watershed Schematic WinTR-55 Multiple Sub-Areas

  14. WinTR-55 Main Window WinTR-55 Multiple Sub-Areas

  15. Adding Stream Reaches • WinTR-55 Main Window • Reach Data Window • Reach Flow Path Window WinTR-55 Multiple Sub-Areas

  16. Stream Reach Data • Data compiled prior to input: • Reach Name • Name of receiving (or downstream) reach (could be Outlet) • Cross-section data: • Manning’s “n” • Friction slope • Bottom Width • Average side slopes WinTR-55 Multiple Sub-Areas

  17. Reach Data Window WinTR-55 Multiple Sub-Areas

  18. Reach Data Window WinTR-55 Multiple Sub-Areas

  19. Plotted Channel Rating WinTR-55 Multiple Sub-Areas

  20. Computing Stream Reach Ratings • Manning’s Equation for Channel Flow: Q = discharge (cu ft/s) r = hydraulic radius = A/pw A = cross-sectional flow area (sq ft) pw = wetted perimeter (ft) s = slope of hydraulic grade line (channel slope, ft/ft) n = Manning’s roughness coefficient for open channel flow WinTR-55 Multiple Sub-Areas

  21. 1 D z 1 z BW TW Trapezoidal Cross-Section WinTR-55 Multiple Sub-Areas

  22. Trapezoidal Cross-Section ? WinTR-55 Multiple Sub-Areas

  23. Sideslope BW Low Flows WinTR-55 Multiple Sub-Areas

  24. Sideslope Bottom Width High Flows WinTR-55 Multiple Sub-Areas

  25. Non-representative Section WinTR-55 Multiple Sub-Areas

  26. Reach Routing • Muskingum-Cunge Routing Method • Alters the hydrograph as it flows through a reach, utilizing the rating information Reach Inflow ReachOutflow WinTR-55 Multiple Sub-Areas

  27. Reach Data Window WinTR-55 Multiple Sub-Areas

  28. Quick Help WinTR-55 Multiple Sub-Areas

  29. Adding Stream Reaches • WinTR-55 Main Window • Reach Data Window • Reach Flow Path Window WinTR-55 Multiple Sub-Areas

  30. Reach Flow Path Window WinTR-55 Multiple Sub-Areas

  31. Capabilities and Limitations

  32. Number of sub-areas 1 - 10 Number of reaches 0-10 Types of reaches Channel or Structure Channel Reach Routing Procedure Muskingum-Cunge Capabilities & Limitations WinTR-55 Multiple Sub-Areas

  33. Questions?

  34. Entering Data, Running the Program and Interpreting Output Demonstration Problem #3 Multiple Sub-area Watershed with Stream Reach

  35. Demonstration Problem #3 • Road commissioner needs to size a culvert at the county road downstream of the proposed subdivision in Williamson County, Illinois • The culvert needs to be large enough to handle “future condition” flows for the 10-year storm event WinTR-55 Multiple Sub-Areas

  36. Culvert Reach 2c Reach 1b Demonstration Problem #3 C B A WinTR-55 Multiple Sub-Areas

  37. Sub-area Data Location: Williamson County, Illinois WinTR-55 Multiple Sub-Areas

  38. Stream Reach Data Location: Williamson County, Illinois WinTR-55 Multiple Sub-Areas

  39. Culvert Legend: Storage Area Sub-Area Inflow Points Sub-area C Reach 2c Reach 1b Sub-area B Sub-area A Schematic Outlet C B A WinTR-55 Multiple Sub-Areas

  40. Adding Stream Reaches • WinTR-55 Main Window • Reach Data Window • Reach Flow Path Window WinTR-55 Multiple Sub-Areas

  41. WinTR-55 Main Window WinTR-55 Multiple Sub-Areas

  42. Reach Data Window WinTR-55 Multiple Sub-Areas

  43. Reach Flow Path Window WinTR-55 Multiple Sub-Areas

  44. Run WinTR-55 WinTR-55 Multiple Sub-Areas

  45. Output WinTR-55 Multiple Sub-Areas

  46. Discussion Questions For the 10-year storm event: 1. What is the discharge due to runoff from each sub-area? • What is the total discharge at the outlet of each sub-area? 3. What is the total discharge at the watershed outlet? 4. What is the design discharge for the culvert replacement? WinTR-55 Multiple Sub-Areas

  47. Solution 1. 2. 3. 4. qpeak from Sub-Area A qpeak from Sub-Area A qpeak from Sub-Area B qpeak from Sub-Area B qpeak from Sub-Area C qpeak from Sub-Area C = Total qpeak at Outlet A + qpeak from Reach 1b = Total qpeak at Outlet B + qpeak from Reach 2c = Total qpeak at Outlet C Total qpeak at Watershed Outlet Design qpeak for culvert replacement WinTR-55 Multiple Sub-Areas

  48. Questions?

  49. Entering Data, Running the Program and Interpreting Output Example Problem #3 Multiple Sub-area Watershed with Stream Reach

  50. West Fork Sub-area East Fork Sub-area Dry Creek Sub-area Dry Creek (Reach Routing) Example Problem WinTR-55 Multiple Sub-Areas

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