Regional%20Hydraulic%20Model%20for%20the%20City%20of%20Austin

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Regional Hydraulic Model for the City of Austin
CE 394 K2 - Surface Water Hydrology Esteban Azagra
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Objectives

• Create a regional hydraulic model for the city
  of Austin.
• Specific goal flow analysis.

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Tools

• CRWR-PrePro ArcView preprocessor that extracts
  information from digital spatial data and creates
  an input file for non-GIS applications.

• HEC-HMS Hydrologic Modeling System for
  precipitation-runoff simulation.

• HEC-RAS one-dimensional Hydraulic Model for
  channel analysis and floodplain determination.

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Methodology

• Watershed delineation and HMS schematic
  generation with PrePro.
• Generate flows with HEC-HMS.
• Compare flows and run HEC-RAS.

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Sample Area

• Branched
• Relatively flat
• Cross-sections available

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Data required for the Study

• STATSGO (USDA-NRCS)

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Working with CRWR-PrePro
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Working with CRWR-PrePro
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Running HEC-HMS(Basin Model)
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Running HEC-HMS(Precipitation Model)
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Running HEC-HMS(Control Specifications)
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Running HEC-HMS (Results)
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Flow analysis
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Conclusions

• Differences are too big!
• Check City of Austin flow values.
• Model calibration? (X, Vs)

• Very suitable approach for flow determinations.
• Analysis of big areas.
• HMS flow values can be exported to RAS.

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Future work

• GIS representation of flooded areas.
• Work with DOQs.
• AVRAS.
• Other approaches (TIN not available).

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Questions