Watch the videos of the building of the islands off China. They take a shallow place in the ocean and use vessels with pumps to redirect sand and material from point A, and pump it to point B. Yeah, it’s a moist, slushy mess, but given time and enough material, eventually you are pumping this slush on top of a dry spot…and that dry spot gets higher, and wider….creating an island.
It won’t be very stable, and won’t be great to build on, but it does the job for most purposes. It is very expensive, and unreliable (see the Japan airport)…but the value is whatever the people doing it consider worthwhile.
Latest Answers