Analysis of the Impact of Plain and Hilly Terrain on Typhoon Intensity Attenuation in Southeastern Coastal Regions

This study selects three typhoons—"Mangkhut," "Doksuri," and "Haikui"—to compare attenuation characteristics between plains and hills in southeastern coastal regions. The results show that the average attenuation rate in plains is significantly higher than in hills; strong typhoons attenuate faster in plains, and terrain interacts with initial wind speed to influence the attenuation process. The study provides a basis for terrain-specific disaster prevention: plains should focus on preventing wind damage during the rapid attenuation phase of strong typhoons, while hills should focus on sustained wind/rain and secondary risks.