Hainan Island's Estuaries Undergo Dramatic Evolution, Impacting Coastal Communities.
The Hainan Island coast has different types of estuaries, including sand bar lagoon, estuarine, and drowned valley types. These estuaries have evolved over time due to factors like tectonic fault zones, river deposits, and tidal dynamics. The southeastern coast has sand bar lagoon estuaries, while the west has estuarine estuaries formed by river and coast erosion. The north and northeast coast has drowned valley estuaries, which are in their late evolution stages.