Lessons learned from past floods in Algeria for strengthened disaster preparedness

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PowerPoint presentation courtesy of Dr. Walter Hays, Global Alliance for Disaster Reduction

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Lessons learned from past floods in Algeria for strengthened disaster preparedness

  1. 1. LESSONS LEARNED ABOUT DISASTER RESILIENCEALL FLOODS PREPAREDNESS FOR ALL OF THE LIKELY FLOOD HAZARDS IS ESSENTIAL FOR DISASTER RESILIENCE
  2. 2. LESSONS LEARNED FROM PAST NOTABLE DISASTERS ALGERIA PART 1: FLOODS
  3. 3. ALGERIA
  4. 4. ALGERIA: AFRICA—EURASIA COLLISION
  5. 5. 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
  6. 6. Natural Phenomena that Cause DisastersPlanet Earth’s atmospheric, hydrospheric, and lithospheric interactions cause FLOODS
  7. 7. 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.
  8. 8. 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.
  9. 9. THE REASONS ARE . . .• The community is UN- PREPARED for what will happen
  10. 10. THE REASONS ARE . . .• When it does happen, the functions of the community’s buildings and infrastructure are UNPROTECTED with the appropriate codes and standards
  11. 11. THE REASONS ARE . . .• The community has NO RELIABLE WARNING SYSTEM in place
  12. 12. THE REASONS ARE . . .• The community LACKS THE CAPACITY TO RESPOND to the full spectrum of emergency situations.
  13. 13. THE REASONS ARE . . .• The community is INEFFICIENT during recovery and reconstruction because it HAS NOT LEARNED from either this experience or the prior experiences.
  14. 14. TOWARDS FLOODDISASTER RESILIENCE
  15. 15. 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
  16. 16. ELEMENTS OF FLOOD RISK HAZARDS EXPOSURE RISK VULNERABILITY LOCATION
  17. 17. HIGH POTENTIAL LOSS EXPOSURESIN A FLOODA community’s people,property, essential and criticalinfrastructure, businessenterprise, and governmentcenters can be at high risk.
  18. 18. 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
  19. 19. WHAT WILL HAPPEN? FLOOD HAZARDS(AKA THE POTENTIAL DISASTER AGENTS)
  20. 20. FLOOD HAZARDS• TOO MUCH WATER DISCHARGED WITHIN THE DRAINAGE SYSTEM TO BE ACCOMMODATED IN THE REGIONAL WATER CYCLE• INUNDATION• EROSION• SCOUR• MUDFLOWS
  21. 21. LESSONS LEARNED ABOUT DISASTER RESILIENCEALL FLOODS PREPAREDNESS FOR ALL OF THE LIKELY FLOOD HAZARDS IS ESSENTIAL FOR DISASTER RESILIENCE
  22. 22. LESSONS LEARNED ABOUT DISASTER RESILIENCEALL FLOODS PROHIBITING THE CONSTRUCTION OF BUILDINGS AND LIFELINE SYSTEMS IN THE FLOODPLAIN IS ESSENTIAL FOR DISASTER RESILIENCE
  23. 23. LESSONS LEARNED ABOUT DISASTER RESILIENCEALL FLOODS TIMELY EMERGENCY RESPONSE IS ESSENTIAL FOR DISASTER RESILIENCE
  24. 24. SOME OF ALGERIA’S NOTABLE FLOODS NOVEMBER 10, 2001 OCTOBER 1, 2008
  25. 25. NOVEMBER 10, 2001 IN A TIME OF POLITICAL CHANGE,DEVASTATING FLOODING FOLLOWED 2 YEARS OF DROUGHT
  26. 26. 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.
  27. 27. 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.
  28. 28. October is typically a badmonth for heavy rainfall and floods in Algeria
  29. 29. FLOODING IN GHARDAIAPROVINCE, ALGERIA700 KM (435 MILES) SOUTH OFALGIERSOCTOBER 1, 2008
  30. 30. GHARDAIA, ALGERIAFLOODING; OCT 1, 2008
  31. 31. IMPACTS AFTER SEVERALDAYS OF HEAVY RAIN• Thirty dead• Fifty injured• Bridges and roads badlydamaged
  32. 32. THE NEXT FLOOD IS INEVITABLE • BUT, FLOOD DISASTER RESILIENCE IS NOT AN IMPOSSIBLE DREAM!

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