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FEMA’s Disaster Applications of 3D Terrain Data

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FEMA’s Disaster Applications of 3D Terrain Data. Doug Bausch, FEMA Region VIII Denver, CO July 25 th , 2014. Rapid Inundation Assessment. Obtain 3D terrain. Develop flood surface from model and/or field observations. Subtract terrain from flood surface.

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fema s disaster applications of 3d terrain data

FEMA’s Disaster Applications of 3D Terrain Data

Doug Bausch, FEMA Region VIII

Denver, CO

July 25th, 2014

rapid inundation assessment
Rapid Inundation Assessment
  • Obtain 3D terrain
  • Develop flood surface from model and/or field observations
  • Subtract terrain from flood surface
sandy 2012 expedited assistance
Sandy 2012: Expedited Assistance

-44K households identified as damaged and inaccessible

-Over $130M in expedited assistance based on accurate and rapid flood depth information

nyc 3dep vs low resolution
NYC: 3DEP vs Low Resolution

Areas “flooded” at low resolution

sandy 2012 analysis of nfip impacts
Sandy, 2012: Analysis of NFIP Impacts
  • Flood depths assigned to 200,000+ policies
  • Integrated into request to increase borrowing authority –
    • $9.7 billion
colorado 2013 floods
Colorado 2013 Floods

Impacts:

  • 10 lives lost
  • Over 8,000 evacuated
  • Over $3B in losses
  • 138 communities with damage
colorado flood 2013 3dep post event lidar
Colorado Flood 2013 – 3DEP Post Event Lidar
  • Significant stream morphology changes
  • Rare use of disaster funds ($2M) to purchase
  • Partnership and expedited delivery
  • Rapidly produced new floodplain mapping

Boulder

Denver

slide12

1/3rd of all households in Jamestown and Lyons were damaged

700 households in Lyons without water or sewer

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Infrastructure Progress

COLORADO FLOODING DR- 4145 - CO

slide14

-$60M to address imminent flood threat due to debris deposition and erosion

Infrastructure Progress

COLORADO FLOODING DR- 4145 - CO

slide17

Colorado 2013 Infrastructure Restoration

-Design guidance for permanent restoration

-$2.1B infrastructure restoration

-includes $528M in mitigation and resiliency investments

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3DEP Disaster Applications Summary

  • Expedites response and recovery
    • Supports partnerships in obtaining and expedited delivery
    • Provides high quality accurate floodplain maps
    • Supports sound decision-making and investments
    • Helps support resilient communities
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