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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

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
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

SOME OF THE USA’S NOTABLE FLOODS

LOW MORTALITY, BUT VERY HIGH ECONOMIC LOSSES




Usa s notable historic floods

1889 JOHNSTON, PENNSYLVANIA FLOOD

DEATHS:2,200

USA’S NOTABLE HISTORIC FLOODS


Usa s notable historic floods1

1927 GREAT MISSISSIPPIERIVER FLOOD

DEATHS: 246

USA’S NOTABLE HISTORIC FLOODS


Usa s notable historic floods2

1928 ST FRANCIS DAM FAILURE IN CALIFORNIA

DEATHS: 400

USA’S NOTABLE HISTORIC FLOODS


Usa s notable historic floods3

1937 OHIO RIVER FLOOD (PENN., OHIO, KY, WV, INDIANA, ILLINOIS)

DEATHS: 385

USA’S NOTABLE HISTORIC FLOODS


Usa s notable historic floods4

1993 GREAT MISSISSIPPI RIVER BASIN FLOOD

DEATHS: 50

USA’S NOTABLE HISTORIC FLOODS


Usa s notable historic floods5

2005 LEVEE FAILURES IN NEW ORLEANS AFTER HURRICANE KATRINA

DEATHS: 70

USA’S NOTABLE HISTORIC FLOODS

8


Usa s notable historic floods6

2009 RED RIVER FLOOD

DEATHS: 4

USA’S NOTABLE HISTORIC FLOODS

8


Red river floods fargo nd top and moorhead mn 2009
RED RIVER FLOODS FARGO, ND (TOP) AND MOORHEAD, MN: 2009




Usa s notable historic floods7

2010 TENNESSEE FLOOD 2009

DEATHS: 31

USA’S NOTABLE HISTORIC FLOODS



Usa s notable historic floods8

2010 ARKANSAS FLOOD 2009

DEATHS: 20

USA’S NOTABLE HISTORIC FLOODS



Emerging technologies for flood risk reduction

REAL TIME WEATHER FORCASTING AND WARNING SYSTEMS 2009

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



Risk reduction strategies for floods

PURPOSE 2009

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
SAND BAGS 2009 : 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
HOOVER DAM: NEVADA 2009

  • FLOOD CONTROL (AND SOURCE OF HYDROELECTRIC POWER) IN THE WESTERN USA


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