WMS Investigates Provo, Utah

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Provo River Watershed Modeling with WMS
Ryan Murdock
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Creation of Hydrologic Model

• Import 17 USGS 7.5 minute quads
• 30m resolution
• UTM projection
• Import 250K Digital Raster Graphic (DRG)

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DEMs and DRG
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DEM Processing

• Fill no data cells
• Smooth DEM
• Compute flow directions flow accumulations
• Convert raster streams to feature arcs
• Choose outlet
• Set accumulation threshold
• Delineate basin boundaries

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FlowAccumulations(threshold 1000)
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Delineated Basinelevation1200m-3800m
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More Data

• USGS gaging stations
• Provo
• Vivian Park
• Heber
• Land use/land cover data
• CN extraction

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Completing the Model

• Create and study sub-basins
• Calibrate flow rates to gaging station records
  (HEC-1)
• Input Reservoirs (Deer Creek)

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Further Analysis

• Analyze lag time time of concentration
  approaches
• Robustness of equations
• Sensitivity to slope, area, and location
• Try multiple methods on same area
• Compare results

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Water Resources Engineers at work