Empirical relation between the typhoon surge deviation and the corresponding typhoon characteristics: a case study in Taiwan |
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Authors: | Chyan-Deng Jan Chih-Ming Tseng Ji-Shang Wang Yun-Hsiang Cheng |
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Institution: | (1) Department of Hydraulic and Ocean Engineering, Disaster Prevention Research Center, National Cheng Kung University, Tainan, 701, Taiwan;(2) Department of Land Management and Development, Chang Jung Christian University, Tainan, Taiwan |
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Abstract: | The relation between typhoon surges and typhoon characteristics measured at Kenfang Tidal Station on the northeast coast of
Taiwan was studied in this paper. Typhoon characteristics include the typhoon center atmospheric pressure, the typhoon near-center
wind speed, the typhoon storm radius, the distance between the typhoon center and the tidal station, and the typhoon approach
tracks. The results show that the typhoon surge deviation is strongly dependent on typhoon characteristics. An empirical typhoon
surge formula is proposed in terms of the typhoon wind speed, the typhoon storm radius, and the distance between the typhoon
center and the tidal station. The coefficients in the empirical formula were evaluated, based on the measured typhoon surge
data at Kenfang Tidal Station. The storm surge deviations at Kenfang Station during Typhoons Doug (1994) and Herb (1996) estimated
using the proposed empirical formula were compared with the measured data as well as with the results of a numerical study. |
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Keywords: | Typhoon Storm surge deviation Storm surge empirical formula |
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