Describing what the Biblical Flood would be like.

1000 cubic meters per second could be a LOT more than 80/sec of velocity or it could be a LOT less. They aren't the same thing.

Let's say the river is 100m wide and an average of 10 meters deep. The 2,000 cubic meters per second (the Rhine) give a velocity of 2 m/sec.

The maximum mean velocity measured with the ADCP was 3.7 m/s. The pitot-static tube, while capable of only point measurements, quantified velocity 0.39 m below the surface. The maximum mean velocity measured with the pitot tube was 5.2 m/s, with instantaneous velocities up to 6.5 m/s.

from: http://water.usgs.gov/...s/2009/magril_gartner_etal_2009.pdf

The next question is can water flow at 10's of meters per second.

Over 200 m/s? Ha, try letting it fall from the height of the moon.

The paper (which I only glanced at) suggest Coriolis forces could spin up the water I guess. But I have a suspicion there is a limit to that too.

increased heterozygosity is cdompletely within the normal range of things

No, it is not.