Sediment coarsening in Yellow River delta threatens coastal geomorphic stability.
The sediment in the abandoned southern Yellow River sub-delta has been getting coarser since the 1980s due to less sediment coming from the Yellow River. This change is causing the coastline to stay stable. The decrease in fine particles in the tidal flat is making the sediment less sticky and more loose. This shift in sediment size could have a big impact on how the coast changes in the future.