Not sure what the question is, rivers flow to the sea and all the continents have continental shelves.
There was a massive flood in the pacific northwest called the ICE age missolula floods and there is a ton of evidence for them.
From the USGS
http://vulcan.wr.usgs.gov/Glossary/Glaciers/IceSheets/description_
lake_missoula.html
You may have misunderstood my intention. I agree there was never a global flood. I was saying that if there were, we should expect universal erosion lines on all continents in all directions towards the oceans where a bulk of the water would have ostensibly receded -- something that we clearly don't see.