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CRWR-PrePro

The Team. Brian AdamsXiming CaiAubrey DuggerFerdinand HellwegerDavid MaidmentFrancisco OliveraSeann Reed. Overview. What is CRWR-PrePro?. Spatial Data. Input file for non-GIS applications. CRWR-PrePro. What is CRWR-PrePro today?. Spatial Data. Basin file for HEC-HMSNot all HMS options are included yet..

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CRWR-PrePro

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    1. CRWR-PrePro Francisco “Paco” Olivera, Ph.D. Center for Research in Water Resources University of Texas at Austin

    2. The Team Brian Adams Ximing Cai Aubrey Dugger Ferdinand Hellweger David Maidment Francisco Olivera Seann Reed

    3. Overview

    4. What is CRWR-PrePro?

    5. What is CRWR-PrePro today?

    6. CRWR-PrePro Components

    7. What is HEC-HMS? “It is a new generation software for precipitation-runoff simulation that supersedes the HEC-1 Flood Hydrograph Package.” HEC-HMS User’s Manual It is a Windows version of HEC-1.

    8. HEC-HMS Components

    9. Previous Work

    10. Watershed Characterization

    11. Watershed Characterization

    12. Watershed Characterization Terrain Analysis

    13. Terrain Analysis

    14. Hydrologic GIS Functions

    15. Burn-In Streams

    16. DEM and Digitized Stream Network

    17. Burned-In DEM Elevation is increased by a fixed value in all DEM cells, except in those that coincide with the digitized stream network.

    18. Flow Direction Water flows to one of its neighbor cells according to the direction of the steepest descent. Flow direction takes one out eight possible values.

    19. Flow Accumulation Flow accumulation is a measure of the drainage area in units of grid cells.

    20. Watershed Characterization Stream-Watershed Delineation

    21. Stream-Watershed Delineation

    22. Stream Network Definition

    23. Stream Network All grid cells draining more than a user-defined threshold value (blue streams), or located downstream of user-defined cells (red streams) are part of the stream network.

    24. Stream Segmentation Stream segments (links) are the sections of a stream channel connecting two successive junctions, a junction and an outlet, or a junction and the drainage divide.

    25. Watershed Outlet Definition

    26. Watershed Outlets The most downstream cells of the stream segments (brown cells), and the user-defined points (red dots) are the watershed outlets.

    27. Modified Stream Segmentation The interactively defined outlets modify the stream segmentation by subdividing the segment in which are located into two segments.

    28. Watershed Delineation

    29. Watershed Delineation The drainage area of each watershed outlet (stream segment) is delineated.

    30. Raster to Vector Conversion

    31. Raster to Vector Conversion Streams and watersheds are converted from raster to vector format.

    32. Dissolving Spurious Polygons Cells connected to the main watershed polygon through a corner are defined as a separate polygon (spurious polygon). These polygons are dissolved into the main polygon.

    33. Merging of Watersheds Adjacent watershed polygons can be merged into a single polygon, if they share their outlet or one flows into the other.

    34. Merging of Watersheds The attribute tables are updated so that the watershed code (WshCode) of the streams is modified and the area of the new polygon is calculated.

    35. Watershed Characterization Calculation of Hydrologic Parameters

    36. Flow Length Downstream to the Watershed Outlet

    37. Flow Length Upstream to the Watershed Divide

    38. Longest Flow-Path

    39. Watershed Lag-Time (SCS)

    40. Watershed Lag-Time (SCS)

    41. Watershed Lag-Time (L/V)

    42. Watershed Lag-Time (L/V)

    43. Watershed Abstractions

    44. Watershed Parameters

    45. Stream Routing Method

    46. Pure Lag Routing

    47. Muskingum Routing

    48. Stream Parameters

    49. Hydrologic Model Extraction

    50. Hydrologic Model Extraction

    51. Hydrologic Model Extraction

    52. Hydrologic Model Extraction

    53. Model Schematic and HEC-HMS Basin File

    54. Hydrologic Model

    55. Connection to HEC-HMS

    56. ArcView Schematic

    57. HEC-HMS Basin File (1)

    58. HEC-HMS Basin File (2)

    59. HEC-HMS Basin File (3)

    60. HEC-HMS

    61. Basin File System Schematic

    62. Basin File Watershed Parameters

    63. Basin File Watershed Parameters

    64. Basin File Stream Parameters

    65. Precipitation File

    66. Control File

    67. Hydrograph Time Table

    68. Hydrograph Summary

    69. Hydrograph Plot

    70. Where do we want to go?

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