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Building Disaster Resilience in Megacities: Key Strategies for Sustainable Safety

Explore the vulnerabilities of megacities to natural hazards and learn about measures to enhance disaster resilience. Discover the challenges faced by cities like Tokyo, Los Angeles, and San Francisco, and the importance of preparedness, protection, and response strategies.

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Building Disaster Resilience in Megacities: Key Strategies for Sustainable Safety

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  1. CAN MEGACITIES BE DISASTER RESILIENTALTHOUGH “BIG” CAN BE VERY VULNERABLE, WHY NOT Walter Hays Global Alliance For Disaster Reduction

  2. QUESTION • WHAT IS A MEGACITY AND WHAT MEASURES WILL MAKE IT LESS VULNERABLE TO THE POTENTIAL DISASTER AGENTS OF NATURAL HAZARDS?

  3. TOKYO: 21.9 M NEW YORK: 15.6 M MEXICO CITY: 13.9 M SAO PAULO: 12.5 M SHANGHAI: 11.7 OSAKA: 10.0 M BUENOS AIRES: 9.9 M LOS ANGELES: 9.5 M CALCUTA 9.0 M BEIJING 9.0 M SOURCE: THE POPULATION INSTITUTE 2/3/01 MEGACITIES IN 1900WORLD POPULATION:1.6 BILLION

  4. TOKYO: 25.4 M BOMBAY: 18.6 M MEXICO CITY: 18.3 M SAO PAULO: 18.0 M NEW YORK: 16.7 M LAGOS: 14.1 M CALCUTA 13.2 M LOS ANGELES: 13.2 M SHANGHAI: 13.0 M BUENOS AIRES: 12.7 M SOURCE: THE POPULATION INSTITUTE 2/3/01 MEGACITIES IN 2000WORLD POPULATION:6 BILLION

  5. BOMBAY: 28.5 M TOKYO: 27.3 M LAGOS: 26.5 M DHAKA: 24.0 M KARACHI: 21.7 M SAO PAULO: 21.3 M MEXICO CITY: 19.6 M JAKARTA: 19.4 CALCUTA 18.8 M NEW DEHLI: 18:R M SOURCE: THE POPULATION INSTITUTE 2/3/01 MEGACITIES IN 2020WORLD POPULATION:10 BILLION

  6. WHAT HISTORY TEACHES • CITIES AND MEGACITIES EXIST BY GEOLOGIC, HYDROLOGIC, AND ATMOSPHERIC CONSENT, WHICH CAN BE WITHDRAWN WITHOUT NOTICE.

  7. MEGACITIES FACE DISASTERS FROM … • EARTHQUAKES • FLOODS • SEVERE WINDSTORMS • LANDSLIDES • VOLCANIC ERUPTIONS • WILDFIRES • TSUNAMIS • DROUGHTS

  8. INTERLOCKING CONCEPTS ON MEGACITIES AND NATURAL HAZARDS • NATURAL HAZARDS, GENERATE POTENTIAL DISASTER AGENTS WHICH CREATE RISK TO THE BUILT ENVIRONMENT. • THE CHOICE: LIVE WITH UNACCEPTABLE RISK OR ACCEPTABLE LEVELS OF RISK.

  9. INTERLOCKING CONCEPTS ON MEGACITIES AND NATURAL HAZARDS • UNACCEPTABLE RISK CALLS FOR PUBLIC POLICIES TO REDUCE VULNER-ABILITIES.

  10. INTERLOCKING CONCEPTS ON MEGACITIES AND NATURAL HAZARDS • VULNERABILITIES REFLECT POLICY FLAWS WITH RESPECT TO PREPAREDNESS, PROTECTION, RESPONSE, AND RECOVERY

  11. INTERLOCKING CONCEPTS ON MEGACITIES AND NATURAL HAZARDS • PREPAREDNESS, PROTECTION, RESPONSE, AND RECOVERY ARE THE MOST EFFECTIVE MEASURES. • BUT, THEY ARE HARD TO SELL TO THE PUBLIC AND TAKE TIME TO IMPLEMENT.

  12. TOKYO: A MEGACITY AT RISK FROM NATURAL HAZARDS

  13. CAIRO: A MEGACITY AT RISK FROM NATURAL HAZARDS

  14. ISTHANBUL: A MEGACITY AT RISK FROM NATURAL HAZARDS

  15. ISTHANBUL: CAUSES OF VULNERABILITIES • SIZE • FRAGILITY OF EXISTING BUIDINGS/INFRASTRUCTURE • INADEQUATE PROTECTION MEASURES • CONSTRUCTION MATERIALS AND PRACTICES

  16. SAN FRANCISCO: DEPENDENT ON TRANSPORTATION • DAMAGE TO ONE SPAN OF THE BAY BRIDGE CHANGED THE LIVES OF MILLIONS AND DISRUPTED MANY BUSINESSES. • NOONE KNOWS THE TRUE COST.

  17. LOS ANGELES: DEPENDENT ON UTILITY SYSTEMS • DAMAGE TO A UTILIYY CORRIDOR CAUSEED WIDESPREAD OUTAGES OF POWER, GAS, WATER, AND WASTE CENTERS. • OUTAGES LED TO LOSSES IN THE MILLIONS.

  18. SAN FRANCISCO: SUSCEPTIBLE TO FIRE

  19. QUESTION • CAN WE MAKE MEGACITIES RESILIENT TO NATURAL HAZARDS?

  20. NAT. HAZARDS • INVENTORY • VULNERABILITY • LOCATION • PREPAREDNESS • PRPTECTION • EMERGENCY RESPONSE • RECOVERY • EDUCATIONAL SURGES RISK ASSESSMENT DISASTER RESILIENCE ACCEPTABLE RISK RISK UNACCEPTABLE RISK VULNERABILITY REDUCTON DATA BASES AND INFORMATION MEGACITY HAZARDS: GROUND SHAKING GROUND FAILURE SURFACE FAULTING TECTONIC DEFORMATION TSUNAMI RUN UP AFTERSHOCKS

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