I think I am having trouble understanding the amount of acres needed for a watershed. I have been reading Bob Lusk's "Raising Trophy Bass" and one of the examples it had was a 12 acre lake with an average depth of 6 ft or 72 acre feet. The lake had 50 acres of watershed with 36 inches of yearly rain and 24 inches available for runoff. The book said that this was more than enough. But according to UDSA Pub.590 even the best areas require 1 acre of watershed per acre foot. In the example it is about 5/7 of an acre per acre foot. Thanks for any help.