NATURAL HAZARDS THAT HAVE CAUSED DISASTERS IN ALGERIA FLOODSGOAL: PROTECT PEOPLEAND COMMUNITIES WINDSTORMS/DUSTSTORMS EARTHQUAKESHIGH BENEFIT/COST FROMBECOMING DISASTER LANDSLIDESRESILIENT ENVIRONMENTAL CHANGE GLOBAL CLIMATE CHANGE
Natural Phenomena that Cause DisastersPlanet Earth’s atmospheric, hydrospheric, and lithospheric interactions cause FLOODS
A DISASTER is ------ the set of failures that overwhelm thecapability of a community to respondwithout external help when threecontinuums: 1) people, 2) community(i.e., a set of habitats, livelihoods, andsocial constructs), and 3) complexevents (e.g., floods, earthquakes, ...)intersect at a point in space and time.
Disasters are caused by single- or multiple-event natural hazards that, (for various reasons), cause extreme levels of mortality, morbidity, homelessness,joblessness, economic losses, or environmental impacts.
THE REASONS ARE . . .• The community is UN- PREPARED for what will happen
THE REASONS ARE . . .• When it does happen, the functions of the community’s buildings and infrastructure are UNPROTECTED with the appropriate codes and standards
THE REASONS ARE . . .• The community has NO RELIABLE WARNING SYSTEM in place
THE REASONS ARE . . .• The community LACKS THE CAPACITY TO RESPOND to the full spectrum of emergency situations.
THE REASONS ARE . . .• The community is INEFFICIENT during recovery and reconstruction because it HAS NOT LEARNED from either this experience or the prior experiences.
FLOOD RISK ACCEPTABLE RISK •HAZARDS •INVENTORY RISK •VULNERABILITY UNACCEPTABLE RISK •LOCATION FLOOD DISASTER RESILIENCE DATA BASES ALGERIA’S AND INFORMATION COMMINITIES POLICY OPTIONS •PREPAREDNESSHAZARDS: •PROTECTIONGROUND SHAKINGGROUND FAILURE •EARLY WARNINGSURFACE FAULTINGTECTONIC DEFORMATION •EMERGENCY RESPONSETSUNAMI RUN UP •RECOVERY andAFTERSHOCKS RECONSTRUCTION
ELEMENTS OF FLOOD RISK HAZARDS EXPOSURE RISK VULNERABILITY LOCATION
HIGH POTENTIAL LOSS EXPOSURESIN A FLOODA community’s people,property, essential and criticalinfrastructure, businessenterprise, and governmentcenters can be at high risk.
CAUSES OF RISK LOSS OF FUNCTION OF STRUCTURES IN FLOODPLAIN INUNDATION INTERACTION WITH HAZARDOUS MATERIALS STRUCTURAL/CONTENTS FLOODS DAMAGE FROM WATER WATER BORNE DISEASESCASE HISTORIES (HEALTH PROBLEMS) EROSION AND MUDFLOWS CONTAMINATION OF GROUND WATER
WHAT WILL HAPPEN? FLOOD HAZARDS(AKA THE POTENTIAL DISASTER AGENTS)
FLOOD HAZARDS• TOO MUCH WATER DISCHARGED WITHIN THE DRAINAGE SYSTEM TO BE ACCOMMODATED IN THE REGIONAL WATER CYCLE• INUNDATION• EROSION• SCOUR• MUDFLOWS
LESSONS LEARNED ABOUT DISASTER RESILIENCEALL FLOODS PREPAREDNESS FOR ALL OF THE LIKELY FLOOD HAZARDS IS ESSENTIAL FOR DISASTER RESILIENCE
LESSONS LEARNED ABOUT DISASTER RESILIENCEALL FLOODS PROHIBITING THE CONSTRUCTION OF BUILDINGS AND LIFELINE SYSTEMS IN THE FLOODPLAIN IS ESSENTIAL FOR DISASTER RESILIENCE
LESSONS LEARNED ABOUT DISASTER RESILIENCEALL FLOODS TIMELY EMERGENCY RESPONSE IS ESSENTIAL FOR DISASTER RESILIENCE
SOME OF ALGERIA’S NOTABLE FLOODS NOVEMBER 10, 2001 OCTOBER 1, 2008
NOVEMBER 10, 2001 IN A TIME OF POLITICAL CHANGE,DEVASTATING FLOODING FOLLOWED 2 YEARS OF DROUGHT
ELEMENTS OF THE DISASTER• A months rain fell in 24 hours, the heaviest recorded rainfall in 20 years, causing devastating floods and leaving over 600 dead.
ELEMENTS OF THE DISASTER• In Algiers where a wall of water moved down the steep, narrow streets of the slum district of Bab al-Oued,.more than 500 died in the mass of mud, collapsed buildings and mangled vehicles left by the storm.
October is typically a badmonth for heavy rainfall and floods in Algeria
FLOODING IN GHARDAIAPROVINCE, ALGERIA700 KM (435 MILES) SOUTH OFALGIERSOCTOBER 1, 2008