[G-01] Comprehensive Disaster Prevention Education

[G01-04] Disaster Scientific Evaluation on Hazard Maps in Okinawa Prefecture, Japan

*Yusuke Nagama¹, YUJI ABE¹, Takayuki Ogata¹ (1.Department of Physics and Earth Sciences, Graduate School of Engineering and Science, University of the Ryukyus)

Keywords:natural disaster, geohazard, hazard map, disaster prevention, disaster mitigation, Okinawa Prefecture

Hazard maps were analyzed for all municipalities in Okinawa Prefecture using data produced by the Geospatial Information Authority of Japan (GSJ). Tsunami risks have been broadly estimated along coastal plains in almost all municipalities. Storm surge disaster areas have also been mapped along coasts in about half of municipalities due to the high-risk region of strong typhoons. Floods have infrequently been simulated because many limestone islands lack fluvial landforms such as alluvial fans and deltas. Landslides, slope failures, and debris flows have frequently been assessed on mountains and hills where sedimentary rocks show rapid weathering. Earthquake hazards have been partially predicted in terms of seismic intensity, liquefaction, and structural damage. Such a situation notably reflects the geoscientific setting of Okinawa. Future works should focus on predicting comprehensive geohazards to enhance disaster prevention and mitigation strategies.