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NOTABLE HISTORIC FLOODS IN THE USA. Walter Hays, Global Alliance for Disaster Reduction, University of North Carolina, USA. FLOODS. HAZARDS. EXPOSURE. VULNERABILITY. LOCATION. ELEMENTS OF RISK. RISK. FLOOD HAZARDS (AKA POTENTIAL DISASTER AGENTS ).
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NOTABLE HISTORIC FLOODS IN THE USA Walter Hays, Global Alliance for Disaster Reduction, University of North Carolina, USA
HAZARDS EXPOSURE VULNERABILITY LOCATION ELEMENTS OF RISK RISK
FLOOD HAZARDS (AKA POTENTIAL DISASTER AGENTS) • Too much water inserted quickly in the regional drainage system to be accommodated normally within the water cycle • Erosion • Scour • Mudflows
CAUSES OF RISK LOSS OF FUNCTION OF STRUCTURES IN FLOODPLAIN INUNDATION INTERACTION WITH HAZARDOUS MATERIALS STRUCTURAL/CONTENTS DAMAGE FROM WATER FLOODS WATER BORNE DISEASES (HEALTH PROBLEMS) CASE HISTORIES EROSION AND MUDFLOWS CONTAMINATION OF GROUND WATER
DAMAGE INJURIES COLLAPSE DEATHS LOSS OF FUNCTION ECONOMIC LOSS UNACCEPTABLE RISK RISK
FIVE PILLARS OF RESILIENCE • HAZARDS • INVENTORY • VULNERABILITY • LOCATION • PROTECTION • PEPAREDNESS • EARLY WARNING • EMERGENCY RESPONSE • RECOVERY RISK ASSESSMENT ACCEPTABLE RISK RISK UNACCEPTABLE RISK GOAL: FLOOD DISASTER RESILIENCE DATA BASES AND INFORMATION USA’S COMMUNITIES HAZARDS: GROUND SHAKING GROUND FAILURE SURFACE FAULTING TECTONIC DEFORMATION TSUNAMI RUN UP AFTERSHOCKS
SOME OF THE USA’S NOTABLE FLOODS LOW MORTALITY, BUT VERY HIGH ECONOMIC LOSSES
1889 JOHNSTON, PENNSYLVANIA FLOOD DEATHS:2,200 USA’S NOTABLE HISTORIC FLOODS
1927 GREAT MISSISSIPPIERIVER FLOOD DEATHS: 246 USA’S NOTABLE HISTORIC FLOODS
1928 ST FRANCIS DAM FAILURE IN CALIFORNIA DEATHS: 400 USA’S NOTABLE HISTORIC FLOODS
1937 OHIO RIVER FLOOD (PENN., OHIO, KY, WV, INDIANA, ILLINOIS) DEATHS: 385 USA’S NOTABLE HISTORIC FLOODS
1993 GREAT MISSISSIPPI RIVER BASIN FLOOD DEATHS: 50 USA’S NOTABLE HISTORIC FLOODS
2005 LEVEE FAILURES IN NEW ORLEANS AFTER HURRICANE KATRINA DEATHS: 70 USA’S NOTABLE HISTORIC FLOODS 8
2009 RED RIVER FLOOD DEATHS: 4 USA’S NOTABLE HISTORIC FLOODS 8
DRONES MONITORED LEVEES IN FARGO, NORTH DAKOTA AREA, MARCH 2009
2010 TENNESSEE FLOOD DEATHS: 31 USA’S NOTABLE HISTORIC FLOODS
2010 ARKANSAS FLOOD DEATHS: 20 USA’S NOTABLE HISTORIC FLOODS
REAL TIME WEATHER FORCASTING AND WARNING SYSTEMS MEASURMENT TECHNOLOGIES (E.G., STREAM GAGUES) RISK MODELING (E.G., HAZUS, INSURANCE UNDERWRITING) DATABASES MAPS: 100-YEAR AND 500-YEAR FLOODS FLOOD DISASTER SCENARIOS DRONE PLANES HAZMAT MANAGEMENT EMERGING TECHNOLOGIES FOR FLOOD RISK REDUCTION
PURPOSE PREVENTION PROTECTION LAND USE CONTROL TECHNIQUE WATERSHED MANAGEMENT FLOOD CONTROL (LEVEES, LOCKS, AND DAMS) ZONING MAPS (BUILD – NO BUILD) RISK REDUCTION STRATEGIES FOR FLOODS
SAND BAGS: LEVEE AUGMENTATION IN THE MISSISSIPPI RIVER BASIN • 2.5 MILLION SAND BAGS AUGMENTED SANDBAGS AND REDUCED LOSSES IN THE 1993 MISSISSIPPI RIVER FLOOD
HOOVER DAM: NEVADA • FLOOD CONTROL (AND SOURCE OF HYDROELECTRIC POWER) IN THE WESTERN USA