Before revision: A stream pool, in hydrology, is a stretch of a river or stream in which the water depth is above average and the water velocity is below average.Matthew Chasse, Riffle characteristics in stream investigations Formation
After revision: Stream pool formation.A stream pool, in hydrology, is a stretch of a river or stream in which the water depth is above average and the water velocity is below average.Matthew Chasse, Riffle characteristics in stream investigations Formation