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Development of a Hydrologic Model and Estimation of its Parameters

Hydrologic Parameters. WatershedAbstractions and routing methodParametersStreamRouting methodParameters. Watershed Abstractions. . . Precipitation (mm/hr). Excess precipitation (mm/hr). Excess precipitation = f(Precipitation, Terrain properties). . Terrain properties. Watershed Abstractions. SCS curve number method.

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Development of a Hydrologic Model and Estimation of its Parameters

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    1. Development of a Hydrologic Model and Estimation of its Parameters Francisco Olivera, Ph.D., P.E. Department of Civil Engineering Texas A&M University

    2. Hydrologic Parameters Watershed Abstractions and routing method Parameters Stream Routing method Parameters

    3. Watershed Abstractions

    4. Watershed Abstractions SCS curve number method

    5. Watershed Abstractions Initial plus constant loss rate

    6. Watershed Routing

    7. Watershed Routing SCS unit hydrograph

    8. Watershed Lag-Time (SCS)

    9. Watershed Lag-Time (L/V)

    10. Watershed Routing

    11. Hydrologic Parameters Watershed Abstractions and routing method Parameters Stream Routing method Parameters

    12. Watershed Parameters Area Abtractions: SCS curve number method (average curve number) Linear loss rate (initial and constant loss rate) Routing SCS curvilinear unit hydrograph (length and slope of longest flow path, average curve number, average velocity in longest flow path)

    13. Elevation Grid

    14. Flow Length Downstream

    15. Flow Length Upstream

    16. Longest Flow-Path

    17. Flow Length Downstream to the Watershed Outlet

    18. Flow Length Downstream to the Watershed Outlet

    19. Flow Length Upstream to the Watershed Divide

    20. Flow Length Upstream to the Watershed Divide

    21. Watershed Longest Flow-Path

    22. Watershed Longest Flow-Path

    23. Slope of Watershed Longest Flow Path

    24. Watershed Parameters

    25. Hydrologic Parameters Watershed Abstractions and routing method Parameters Stream Routing method Parameters

    26. Routing Method

    27. Routing Method

    28. Pure-Lag Method Flow is delayed a fixed amount of time tlag.

    29. Pure Lag Parameters

    30. Muskingum Method Flow is delayed a fixed amount of time K, and redistributed around its centroid.

    31. Muskingum Parameters

    32. Hydrologic Parameters Watershed Abstractions and routing method Parameters Stream Routing method Parameters

    33. Stream Parameters Length Routing Pure lag method (average flow velocity) Muskingum method (average flow velocity and storage coefficient)

    34. Stream Parameters

    35. Hydrologic Model

    36. HEC-HMS Schematic in ArcView

    37. HEC-HMS Basin File (1)

    38. HEC-HMS Basin File (2)

    39. HEC-HMS Basin File (3)

    40. Basin File System Schematic

    41. Basin File Watershed Parameters

    42. Basin File Watershed Parameters

    43. Basin File Stream Parameters

    44. Precipitation File

    45. Control File

    46. Hydrograph Time Table

    47. Hydrograph Summary

    48. Hydrograph Plot

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