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Using Natural Disasters to Teach Science Hurricane Mitch – October 1998 Using Natural Disasters to Teach Science Destruction Caused by Hurricane Mitch in Honduras Hurricane stalled over the mainland October 29 - 31 1998. 7,000 fatalities 33,000 homes destroyed 95 bridges destroyed

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slide1

Using Natural Disasters to Teach Science

Hurricane Mitch – October 1998

slide2

Using Natural Disasters to Teach Science

Destruction Caused by Hurricane Mitch in Honduras

  • Hurricane stalled over the mainland October 29 - 31 1998.
  • 7,000 fatalities
  • 33,000 homes destroyed
  • 95 bridges destroyed
  • 70% of road network damaged
slide3

Flooding Caused by Hurricane Mitch

Destroyed housing

Flood-inundated area

Destroyed

agriculture

Tributary

Rio Choluteca

slide4

Using Natural Disasters to Teach Science

Landslides Caused by Hurricane Mitch

slide5

Using Natural Disasters to Teach Science

El Berrinche Landslide Scar (looking south)

slide6

Using Natural Disasters to Teach Science

Cross Section and Lidar Map of El Berrinche Landslide in Honduras (map view to west)

slide7

Using Natural Disasters to Teach Science

  • Lidar : Light Detection and Ranging
slide8

Using Natural Disasters to Teach Science

Review of Lidar Principles

  • Scanning mirror sweeps laser beam across the ground
  • Range to target is determined by measuring time interval between outgoing and return of reflected laser pulse
  • Aircraft position is determined using GPS phase differencing techniques
  • Pointing direction of laser determined with Inertial Measuring Unit (IMU) and recording of mirror position
  • Data streams recorded and synchronized to process
slide9

Using Natural Disasters to Teach Science

Lidar Flight Lines over Tegucigalpa, Honduras

Survey area

Flight lines

slide10

Using Natural Disasters to Teach Science

Result of Lidar Mapping

  • Two-dimensional map of Tegucigalpa, Honduras
  • El Berrinche landslide scar shown by black dotted line
  • Colors show elevation of land surface in meters
  • Map is about 3000 m (3 km) wide by 3200 m (3.2 km) tall.