Abstract: The hydrodynamic characteristics and salinity variation in wetland waters in Pink Beach was investigated by the MIke 21 hydrodynamic model in which effect of vegetation on currents was represented by Manning’s coefficient, by acquiring spatial distribution of sea grassesSuaedaheteropteraandPhragmitescommunisin Liao River estuarine wetland based on Landsat TM satellite remote sensing technology, and making Manning files for calculation. The results showed that the vegetation led to reduce the flow rate of wetland water and to differences in characteristics of the water movement between wetland and rivers and gulfs, especially heavy vegetation. The increase in upstream runoff resulted in a decrease in salinity in the wetland, and the variety of upstream runoff caused changes in salinity affecting the growth of the sea grasses. The findings provide scientific reference with the protection and restoration of Pink Beach wetlands.
2018, Vol. 33 
