The Mekong River is the twelfth largest river system in the world and the seventh largest in Asia. Its source is located in the mountains of Nepal and it flows through Myanmar, Laos, Thailand, and Cambodia into the South China Sea in the south of Vietnam. The Mekong and its catchment area froms an invaluable ecosystem that is often seen as an indefinite resource for hydro power. Of course hydro power is a renewable energy source and therefore relatively environmentally friendly, but through massive dam building projects upstream, the lifeline for millions of people living at the very end of the stream, in the Mekong Delta, is being cut off. Threats such as erosion, land subsidence and salinity intrusion are getting worse. Sedimentation carried within the Mekong allowed the delta to maintain its elevation above sea level. However, the reduction of upstream sediment supply has disturbed this natural balance. Understanding that through sediment accumulation the Mekong Delta basically built itself during the last 4000 years, sets a step to a different approach on the future growth of the land. Because the inevitable will happen and some land will be taken back by the ocean, we need to either protect the land that is there or "make more". Expand. Luckily the deltas entire ecosystem is just that... a natural land expansion machine. This is the base for an adaptive design strategy, that supports future land growth around the current shoreline and integrates renewable energy sources in the process.