In this, the second part of a three part series on reading the water, Tom discusses basic river hydraulics and how just knowing a few simple rules will help you a lot on the river.

Next week, Tom will teach us how to apply what we have learned in the "Reading the Water" series. Tom will discuss his approach to boulders and sweepers... what is a sweeper? Find out next week!

If you have a question or suggestion for a future installment of The Orvis Fly Fishing Guide Podcast, visit www.orvis.com/podcast.