lessons learned from past notable disasters part iii d: china landslides
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DESCRIPTIONLESSONS LEARNED FROM PAST NOTABLE DISASTERS PART III D: CHINA LANDSLIDES. Walter Hays, Global Alliance for Disaster Reduction, Vienna, Virginia, USA . NATURAL HAZARDS THAT PLACE CHINA’S COMMUNITIES AT RISK. FLOODS. GOAL: DISASTER RESILIENCE. TYPHOONS. EARTHQUAKES. - PowerPoint PPT Presentation
LESSONS LEARNED FROM PAST NOTABLE DISASTERS PART III D: CHINALANDSLIDES
Walter Hays, Global Alliance for Disaster Reduction, Vienna, Virginia, USA
NATURAL HAZARDS THAT PLACE CHINAS COMMUNITIES AT RISK
GLOBAL CLIMATE CHANGEENACT AND IMPLEMENT POLICIES HAVING HIGH BENEFIT/COST FOR COMMUNITY RESILIENCEGOAL: DISASTER RESILIENCE
CHINASCOMMUNITIESDATA BASES AND INFORMATIONHAZARDS: GROUND SHAKING GROUND FAILURE SURFACE FAULTING TECTONIC DEFORMATION TSUNAMI RUN UP AFTERSHOCKS
TOWARDS LANDSLIDE DISASTER RESILIENCE
MAP OF CHINAS PROVINCES
LANDSLIDESLARGE VOLUME LANDSLIDES OCCUR IN ASSOCIATION WITH AN EARTHQUAKES GROUND SHAKING OR A TYPHOONS RAINFALL
M8.0 BEICHUAN EARTHQUAKE GENERATED LARGE VOLUME LANDLIDES
2:30 PM LOCAL TIMEMAY 12, 2008
BEICHUAN, CHINA EARTHQUAKE: MAY 12, 2008
PHYSICAL CHARACTERISTICS OF THE EARTHQUAKEEpicenter was located 100 km (60 miles) from Chengdu, the provincial capital, which is on edge of the Tibetan foothills and home to about 10 million people.This earthquake occurred on a well known fault zone, which has generated destructive earthquakes in the past (e.g., on 25 August 1933).
CHANGDU, 100 KM FROM EPICENTER
COMPARISON WITH 1976 TANGSHAN EARTHQUAKEThe Beichuan earthquake was more than 2 x larger than the July 28,1976 Tangshan earthquake, which caused 255,000+ deaths.
EMERGENCY RESOURCES More than 20,000 military personnel were ordered immediately to assist in high-damage areas.The number was increased substantially to deal with the earthquake lakes.
SOCIETAL IMPACTS OF THE LANDSLIDESSome roads were impassable because of landslides, which hindered search and rescue,---but, worst of all, 69 unique earthquake lakes were created by the landslides in mountainous regions.
SITING AND BUILDING ON UNSTABLE SLOPESLANDSLIDESSOIL AND ROCK SUCEPTIBLE TO FALLSSOIL AND ROCK SUCEPTIBLE TO TOPPLESSOIL AND ROCK SUCEPTIBLE TO SPREADSSOIL AND ROCK SUSCEPTIBLE TO FLOWS
PRECIPITATION THAT TRIGGERS SLOPE FAILURE SHAKINGGROUND SHAKING THAT TRIGGERS SLOPE FAILURECAUSES OF DAMAGECASE HISTORIES
69 EARTHQUAKE LAKESCreated by the quake-induced landslides
ONE OF 69 "QUAKE LAKES": BEI HE RIVER DAMMED BY LANDSLIDE DEBRIS
DAYS 14-17: CHINA EARTHQUAKE SURVIVORS NOW HAVING TO COPE WITH THREAT OF FLOODS FROM 69 EARTHQUAKE LAKES
DAYS 14-17: GOVERNMENT MAKES RISK REDUCTION ON 69 "QUAKE LAKES" A TOP PRIORITYSixty-nine Quake Lakes created in mountainous areas by the debris from landslides appeared ready to burst their banks, and continuing rainfall was exacerbating the threat.
$29 million in emergency funds and increased military resources were allocated for the priority effort.
DAYS 14-17: GOVERNMENT PLANS EVACUATIONS TO REDUCE RISK IF A "QUAKE LAKE" SHOULD BURST Authorities announced plans to evacuate more than a million people in anticipation of failure of the rock-and-mud embankments.
Evacuation would have to be accomplished within one to four hours, the time for the wall of water to reach and inundate scores of cities and rural villages that were already devastated.
BEICHUAN: 3.3 KM (2 MI) DOWN-STREAM FROM A "QUAKE LAKE"
LESSONS LEARNED FOR DISASTER RESILIENCEALL NATURAL HAZARDSCAPACITY FOR INTELLIGENT EMERGENCY RESPONSE IS ESSENTIAL FOR COMMUNITY RESILIENCE.
FLEEING POSSIBLE FLOODING
EVACUATIONS TO ESCAPE FLOODING THREAT
THIRTY GIANT EARTHMOVERS FLOWN IN TO QUAKE LAKES
SOLDIERS DISPATCHED TO CREATE DIVERSION CHANNELS
GOAL: A DIVERSION CHANNEL IN FIVE DAYS OR LESS
EVERY HOUR IS IMPORTANT
TANGJIASHAN, LARGEST OF 69 "QUAKE LAKES"
RISING WATER IN TANGJIASHAN CAUSES EVACUATION OF YULI, MAY 31
NO DAMAGE TO THREE GORGES DAM:1,000 KM AWAY
SOLDIERS REPAIR CRACKS IN ZIPINGPU DAM:DUJIANGYAN
LESSONS LEARNED FOR DISASTER RESILIENCEALL NATURAL HAZARDSCAPACITY FOR RECOVERY AND RECONSTRUCTION IS ESSENTIAL FOR COMMUNITY RESILIENCE.
Part III C of this lecture 49411
More lectures at Disasters Supercourse -http://www.pitt.edu/~super1/collections/collection52.htm****************************************