2023年10月30日 · long, gradual erosion. the old-Earth view. Question 3 2 / 2 pts Dr. Austin defines a Grand Canyon megaflood channelized flow as 1 million cubic feet/second of water flow. 1000 times more water flowing in the Grand Canyon than the current average flow. 100 times more water flowing in the Grand Canyon than the current average flow. 10 times more water flowing in the Grand Canyon than the current ...