Can below sea-level depressions in the earth's surface be used to mitigate the effects of rising sea levels?

Question

There are many inland areas in the world which are below sea level. Death Valley and the Salton Sea Basin in California are examples. Couldn't a siphoning system be designed which would allow these depressions to fill with sea water if melting polar ice leads to rising sea levels? I don't know if there would be enough available volume in these areas to make a real difference, but this is pretty simple technology and i would think that having new inland seas would be preferable to losing Manhattan, wouldn't it?

Answer 1

no.

you could drain water into them.

but they're so small that it would make no noticeable difference in sea level.