Adaptation strategy for sea level rise in vulnerable areas along China's coast

It can be seen from the calculation that the vulnerable area along China's mast in which the elevation is less than 5 m, is 143 900 km²,accounting for about 11.3% of the total area of the 11 coastal provinces, municipalities and autonomous regions.These areas are threatened to varying extent by sea level rise.
According to prediction, the relative sea level rise (including global sea level rise caused by climate change and local relative sea level rise caused by vertical crust movement and ground subsidence) along China's coast will be 4~16 cm by the year 2030 with the optimum estimated value of 6~14 cm.It will be 9~26 cm by the year 2050 with the optimum estimated value of 12~23 cm.And it will be 31-74cm by the year 2100 with the optimum estimated value of 47~65 cm.
The calculation result shows that the percentage of the cost for up-grading (heightening and consolidating) sea dykes/walls in adaptation strategy in the losses of submerged areas varies from area to area:6.90% in the Zhujiang (Pearl) River Delta, 1.3%~24.60% in the Changjiang (Yangtze) River Delta, and 0.9%~2.0% in the Huanghe River Delta.