Mapping soil salinity in coastal wetlands is crucial for understanding how salty the soil is in different areas and seasons. Scientists used a new method called ICLSFS, which combines different factors like remote sensing data and land cover types, to map soil salinity accurately. They tested this method in the Yellow River Delta and found that it works well, especially in winter when the soil is bare. The study showed that soil salinity varies across seasons and locations, with higher levels near the shoreline and in salterns. Human activities like building salterns and using salty water for irrigation can make soil more salty, but efforts to reduce salinization have been successful.