You are a fool who cannot understand the Bible!The earth is rotating, turning once every 24 hours, this motion would be imparted to the flood water generating currents.
Also the moon as it orbits the earth, its gravity produces a tidal surge that revovles around the earth following the moon.
These two effects would cause strong currents surging around the earth.
As for sediment. Where did the sediment to form the Colorado Plateau come from? 130,000 square miles of over a mile deep sedimentary rock!
Noah's agriculture was grapes which grow very nicely on hillsides...stone hillsides preferably.
By the time Noah stepped out of the Ark the lands woudl have flushed green with new vegetation - plus of coure most of the Flood's waters was fresh waters so a great amount of fruit and nut bearing bushes and trees woudl have survived quite happily just as they do under the Amazon's yearly inundation.
As for tectonic plates you are a fool as Newton Third Law of Physics proves tectonic plates claim is an idotic theory.
I don't know what your IQ is but it is pretty low.
AS for your idea of ocean curent - there are no currents in standing water.
The Colorado sediments obviously came from the general disturbances of the pre-flood lands - but mainly all the quartz-sand sediments came from the GREAT GEYSERS that started the flood.