Presumption: The water came from somewhere, to cover all the land of the Earth.
Now, if we accept that all the land were covered, we need to have reservoirs for the drainings of the continents - Where did the water go? The only possible (albeit not feasible) mechanism would be for the lands to radically rise, relative to the ocean basins.
Anyhow, it seems impossible to envision waning flood sedimentation models, if you have no place for the water to go.
The year long global flood just doesn't fit into reality. That leaves "God miraculously produced, then disposed of the water". How do you do errosion/sedimentation models for miraculous water movements?
Moose