The root cuase of the sink

Greenhouse gases are trapping more heat in the Earth's atmosphere, causing average temperatures to rise all over the world. Floods are made more likely by the more extreme weather patterns caused by long-term global climate change.

Rising water levels can have potentially large impacts. Scientists have determined that the global sea level has been steadily rising since 1900 at a rate of at least 0.04 to 0.1 inches per year. As the oceans warm due to an increasing global temperature, seawater expands—taking up more space in the ocean basin and causing a rise in water level.

A level can rise by two different mechanisms concerning climate change. The second one, of course, would be ice over land to melt. There is still some uncertainty about the full volume of glaciers and ice caps on Earth, but if all of them were to melt, the global sea level would rise approximately 70 meters, flooding every coastal city on the planet- including Bangkok and surrounding low-lying coastal towns.

Bangkok was developed on a marshy stretch of land in the Chao Phraya delta to accommodate a new capital. It is built on highly compressible layers of soft clay. The sinking of the city is mostly driven by the sheer weight of the built-up urbanization and uncontrolled groundwater extraction. It is predicted that almost 70 percent of the increase in flooding costs in 2050 for Bangkok will be due to land subsidence.