Visualization of Geotechnical Data for Hazard Mitigation and Disaster Response (2015) / Chapter Skim
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8 DEFINITIONS The following definitions were provided in the preamble to the questionnaire sent to the state DOT geotechnical leaders: • Hazard: Condition or situation with the potential to cause harm. • Disaster: Outcome of a hazard when it changes from potential event to actual event.
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9 Category Hazard Examples Atmospheric Hailstorms, hurricanes, lightning, tornadoes, tropical storms Seismic Fault ruptures, ground shaking, landslides, lateral spreading, liquefaction, tsunamis, seiches Other Geologic or Hydrologic Debris avalanches, expansive soils, landslides, rockfalls, submarine slides, subsidence Hydrologic Coastal flooding, desertification, salinization, drought, erosion and sedimentation, river flooding, storm surges Volcanic Tephra (ash, cinders, lapilli) , gases, lava flows, mudflows, projectiles and lateral blasts, pyroclastic flows Wildfire Brush, forest, grass, savannah TABLE 1 HAZARD CLASSIFICATION SYSTEM (OAS)
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10 photograph that were pushed off the embankment by the rockfall. A better understanding of the local geology and seasonal groundwater conditions might have led to hazard mitigation measures that could have avoided this disaster.
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11 Concepts were developed, designs advanced, equipment mobilized, and materials ordered as explorations, excavations, and construction were in progress. Repairs were completed in four months at an estimated savings of $6 million.
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