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Iowa Flooding

Iowa Flooding. Mark Hughes November 25, 2008. University of Iowa News Service. Background. Two “500 year” events Major damage to the University of Iowa and surrounding area. University of Iowa News Service. Where In Iowa?. Iowa State University GIS Facility. Flood Elevations.

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Iowa Flooding

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  1. Iowa Flooding Mark Hughes November 25, 2008 University of Iowa News Service

  2. Background • Two “500 year” events • Major damage to the University of Iowa and surrounding area University of Iowa News Service

  3. Where In Iowa? Iowa State University GIS Facility

  4. Flood Elevations • Iowa River USGS Gauging Station at Iowa City, IA • 1993 Maximum Elevation = 645.17 ft NGVD 29 • 2008 Maximum Elevation = 648.29 ft NGVD 29

  5. Calculated Flooding Map • Map Area Flooded in 1993 and 2008

  6. How accurate is this map? • Trying to get actual flood data map from the University of Iowa • Dam before gauging station

  7. Compare To Flood Maps Map Based on Water Elevation at Iowa City Actual Iowa City Flood Map

  8. The National Center for Airborne Laser Mapping

  9. NCALM Mapped

  10. 2008 Precipitation and Pool Elevation Spill Way Height

  11. Pool Elevation and Discharge

  12. To Do • Get real flood data • Calculate volumes of storage and discharge • Further look into dam operation requirements

  13. Questions ??

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