Combining Weather Research and Forecasting with Advanced Circulation Model for Simulation of Storm Surge Level around Taiwan

• Main Authors: Chien-Wei Yeh, 葉建偉
• Other Authors: Ming-Hsi Hsu
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/50386499857469475272

碩士 === 國立臺灣大學 === 生物環境系統工程學研究所 === 100 === Recently flood disasters increase due to the frequent extreme rainfall conditions. The violent typhoon not only bring heavy rainfall but also cause water level rising which result in the risk of flooding. Flood prevention agencies often rely on a flood warning system on storm surge forecasting for decision making in the emergency response. Therefore, it is important to provide accurate weather data, such as air pressures and wind velocities, for the simulation of storm surge modeling. The Weather Research and Forecasting Model (WRF) and Advanced Circulation Model (ADCIRC) are simulated under the similar domain in the present study. Air pressures and wind velocities of typhoon were generated by WRF and then provided as boundary conditions of meteorological data for ADCIRC. The ADCIRC, storm surge calculation, was calibrated by typhoon FANAPI 2012. Simulated water levels are good agreement with observations in astronomical tides and surge tides. The valid model was appropriately employed to storm surge forecasting for the typhoon MORAKOT. The storm surge boundary conditions were individually forecasted by WRF Four series meteorological date of typhoon MORAKOT. In order to improve the accuracy of forecasts, the storm surge levels are averaged by the four series of storm surge levels when forecasting periods were overlapping. The results revealed that the predictions were identical with observed date.