The whole earth was wiped clean by the flood. There was no more evil, no more violent acts. The earth was green and awaiting the passengers of the Ark to repopulate it. The waters of the flood were on the earth for ten and a half months before the earth was dry enough for Noah and his family to begin life again on it. According to the text it had rained for one hundred and fifty days with out a stop or break, then it took slightly more time again for the waters to clear and dry from the earth.
There is no more mention of Angels marrying and having children with the women of earth. It seems that there were at least two limitations that God put on the earth and mankind at this time, one was to shorten man’s lifespan, and the other, not spoken of was to put an end to angels and humans mixing. We also see in the ninth chapter that God requires the life of a person who commits murder. So capital punishment is in fact set in place by God Himself. God sees human beings as precious, and a person who would destroy another human intentionally should according to God be killed. To not do so results in more deaths by the hands of people who have no value for life. We also note that at this time animals will have a fear of man that did not exist up to the new beginning. Animals were also added to man’s diet. Just the opposite to the idea that we came from cave man who was a hunter and gatherer, then learned to farm.
With all these new limitations God now made a covenant to not destroy the earth in this way again. This covenant is between God and the inhabitants of earth, all living things. He would not destroy every living thing again with water. The token for this one sided deal, contract is the rainbow. It will be seen to remind us of two things. One God did destroy every living thing save one family by a great flood, and two He will not do so again.
God is a god of grace, He saved Noah and his family along with every species of animal of earth instead of destroying the whole thing by the flood waters. God is all powerful and the earth is under His power to do with as He wishes. God is a judge who judges with integrity and surety, His judgements can’t be overturned or changed, there are no appeals. His requirement of us is that we do not decide to turn away from Him. To turn away from Him, to deny His existence, is an intentional act that will bring His judgement to bear. He desires of us to trust Him, to acknowledge Him. He has the grace to overlook and forgive our shortcomings.