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Saturday, March 12, 2011

Tsunami Disaster Mitigation System in Japan | Presentation File

Title             : Disaster Management in Japan
Author         : 企画調整課情報システム室
Filetype       : ppt
Size               : 4,59 Mb
Slide             : 20
Category      : Disaster
Download   : here 

Description :
Mitigation efforts are attempts to prevent hazards from developing into disasters altogether or to reduce the effects of disasters. The mitigation phase differs from the other phases in that it focuses on long-term measures for reducing or eliminating risk. The implementation of mitigation strategies is a part of the recovery process if applied after a disaster occurs. Mitigation measures can be structural or non-structural.

Structural measures use technological solutions like flood levees. Non-structural measures include legislation, land-use planning (e.g. the designation of nonessential land like parks to be used as flood zones), and insurance. Mitigation is the most cost-efficient method for reducing the affect of hazards although not always the most suitable. Mitigation includes providing regulations regarding evacuation, sanctions against those who refuse to obey the regulations (such as mandatory evacuations), and communication of risks to the public. Some structural mitigation measures may harm the ecosystem.

Japan Meteorological Agency (JMA) has established the system which issues warning / information quickly after disaster occurred. It is achieved through over 200 high performance seismometers and a reliable transport network. Now it is possible to release earthquake and tsunami warning / information in less than three minutes after the earthquake occurred.