The Noahide Flood

[Anomalocaris]

It'd require way much more water than that, since the earth is a sphere, and you'd need more and more water to raise the water level each subsequent inch/foot/meter/etc

radius of the earth is around 700 times greater than the depth of even a Noachian flood that drowns the tallest mountain,     so the thin shell approximation of of the volume of water that doesn’t account for what you describe  would be very close to the true volume.