The flood brings the earth to its original state before the separation of the land and the sea (
Gen 1:9-10) - the water again covers everything.
But, with the waters subsiding and Noah’s coming out of the ark, we have the recreation of the earth.
The ground has been cleansed from the pollution caused by unrighteous behaviour.
The earth is recreated but not the human nature (
Gen 8:21).
Gen 9:1-7 - another change; people can eat meat, but they can treat “blood-life” with respect.