Prevention and control of land subsidence in the Red River Delta of Vietnam

At present, the vast majority of urbanized regions in the world have ground subsidence to varying degrees, which affects the geological safety and sustainable development of local areas, particularly in low-altitude river delta areas. The Red River delta in Vietnam was selected for this study, and InSAR technology was used to extract information of land subsidence from April 2016 to September 2021. The spatial distribution patterns of differentiated development in the whole study area especially heavily suffered areas were presented. By reviewing available information, the geological background of land subsidence, inducive factors, and damages in the study area were explored, and comprehensively compared with the Changjiang (Yangtze) River delta of China based. Based on our experiences, the prevention and control countermeasures were proposed for the Vietnamese case, including to strengthen the field investigation and build three-dimensional monitoring systems in a multi-disciplinary cooperation manner. This study provided a guidance for effective prevention and control of land subsidence in the study area and other similar deltaic areas.