Derivation of Parametric Tropical Cyclone Models for Storm Surge Modeling |
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Authors: | WANG Zhi-li LU Yong-jun GENG Yan-fen |
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Affiliation: | [1]State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing 210024, China [2]Transportation College, Southeast University, Nanjing 210096, China |
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Abstract: | In this paper, the parametric tropical cyclone models for storm surge modeling are further developed. Instead of tangential wind speed via cyclostrophic balance and radial wind speed using a simple formulation of defection angle, the analytical expressions of tangential and radial wind speed distribution are derived from the governing momentum equations based on the general symmetric pressure distribution of Holland and Fujita. The radius of the maximum wind is estimated by tropical cyclone wind structure which is characterized by the radial extent of special wind speed. The shape parameter in the pressure model is estimated by the data of several tropical cyclones that occurred in the East China Sea. Finally, the Fred cyclone (typhoon 199417) is calculated, and comparisons of the measured and calculated air pressures and wind speed are presented. |
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Keywords: | tropical cyclone parametric tropical cyclone model storm surge radius of maximum wind shape parameter |
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