Coastal wetlands are valuable natural resources, which provide diversified habitats and important ecological barriers for coastal areas. This study employs the method of inundation frequency and utilizes Landsat images collected every five years, from 1985 to 2023, to analyze the changing trends of tidal flats in Zhejiang Province, in China. Additionally, remote sensing images from the years 1990, 2000, 2010, and 2023 were sel...