Evaluation of Storm Surge Damage in Coastal Lowland
Rivers / Power Generation / Underground Structures / Geotechnical Services
Fukuoka Pref. Japan 2006
Water depth distribution 1 hour after the flood began
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Water depth distribution 2 hours after the flood began
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Global warming has caused rising concern about a rise of the sea level. Also, the possibility of tremendous storms has grown. Evaluation of the risk of storm surge disasters has become important for coastal lowland areas. CTI provides an optimal solution, an analysis and predictions based on applications of cutting-edge technologies. The analysis examples shown above are flood depths in coastal lowland areas in Fukuoka prefecture that face Ariake Bay in Kyushu, Japan. The flooding is caused by a historical maximum model typhoon. Storm surge is calculated using a two-dimensional combined model of waves and tides to examine the wave set-up effect in shallow depths of the bay which have not been fully evaluated before. Overflow and overtopping from coastal dikes and overflow from river levees are calculated to obtain the submerged depth in time series. Practical use depends on several credible conditions and further consideration of coastal dike breaks. Also overall planning of levee enhancement, evacuation routes and procedures, stocking of emergency goods and materials and education of residents become possible.
