The comment above says filling Qattara takes 1,213 cubic kilometres, which would mean about 3mm lower sea level. Which would be a real change, but also quite sm

The comment above says filling Qattara takes 1,213 cubic kilometres, which would mean about 3mm lower sea level. Which would be a real change, but also quite small in the bigger picture. I guess depleting aquifers can lower land levels in those areas. I hear Jakarta has sunk 4 meters from that effect. But it's a separate thing from rising sea levels.