We expect the ocean level to rise when and if the ice caps melt. At enourmous cost we could dredge the shallow parts of the ocean and pile the the dirt on saltwater swamps until the new surface was 200 meters above sealevel. Dreging would reduce the amount of ocean level rise very slightly. As the coastal plains (including many of our cities) became the new salt marsh, we could cover them with with almost 200 meters of dreged material. At some point this new land height would unbalance the plate tetonics, and some of the artificially raised land would sink toward the center of Earth a few meters. We would then have exceeded the "Earth's weight capacity" Neil