Genesis 1 has nothing to do with a world flood. Noahs flood is described as a world inundating flood. If it was meant to be a localized flood, of which there were many, there would be no need to build an Ark to 'save the animals.'
17 ''For 40 days the flood kept coming on the earth. As the waters rose higher, they lifted the ark high above the earth. 18 The waters rose higher and higher on the earth. And the ark floated on the water. 19 The waters rose on the earth until all the high mountains under the entire sky were covered. 20 The waters continued to rise until they covered the mountains by more than 20 feet. 21 Every living thing that moved on land died. The birds, the livestock and the wild animals died. All of the creatures that fill the earth also died. And so did every human being. 22 Every breathing thing on dry land died. 23 Every living thing on earth was wiped out. People and animals were destroyed. The creatures that move along the ground and the birds in the sky were wiped out. Everything on earth was destroyed. Only Noah and those with him in the ark were left.''
