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KMID : 1024520180270030203
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Journal of the Environmental Sciences
2018 Volume.27 No. 3 p.203 ~ p.217
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Building Baseline Data for a Typhoon Protection System via Calculation of the Extreme Wind Speed During a Typhoon
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Na Ha-Na
Park Jong-Kil
Jung Woo-Sik
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Abstract
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For this study, WRF numerical modeling was performed, using RDAPS information for input data on typhoons affecting the Korean peninsula to produce wind data of 700hPa. RAM numerical modeling was also used to calculate 3-second gusts as the extreme wind speed. After comparing wind speeds at an altitude of 10 m to evaluate the feasibility of WRF numerical modeling, modeled values were found to be similar with measured ones, reflecting change tendencies well. Therefore, the WRF numerical modeling results were verified. As a result of comparing and analyzing these wind speeds, as calculated through RAM numerical modeling, to evaluate applicability for disaster preparedness, change tendencies were observed to be similar between modeled and measured values. In particular, modeled values were slightly higher than measured ones, indicating applicability for the prevention of possible damage due to gales. Our analysis of 3-second gusts during the study period showed a high distribution of 3-second gusts in the southeast region of the Korean peninsula from 2002-2006. The frequency of 3-second gusts increased in the central north region of Korea as time progressed. Our analysis on the characteristics of 3-second gusts during years characterized by El Nino or La Nina showed greater strength during hurricanes that affected the Korean peninsula in El Nino years.
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KEYWORD
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3-second gust, WRF, RAM, El Nino, La Nina
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