Published in the August 2013 issue of National Geographic Magazine.

Releases from Glen Canyon Dam peaked on 11/20/12 at around 44,700 cubic feet per second (CFS). This flow is part of a new adaptive management plan for the Colorado River through Glen Canyon and Grand Canyon. They are trying to replicate natural flood cycles that would deposit sediment along beaches throughout the Grand Canyon. These beaches in turn supplied breeding grounds for the endangered native fish that still occupy parts of the Colorado in Grand Canyon. The Glen Canyon Dam has stopped most of the sediment that used to create these beaches. Only a few side rivers dump significant amounts of sediment into the Colorado below Glen Canyon Dam. One major contributor is the Paria River which enters the Colorado right at the boundary of Glen Canyon NRA and Grand Canyon NP. I happened to film a very large flash flood on the Paria river on 8/19/12 that helped the adaptive management team decide the timing and duration of this high flow event. You can see the video here :http://www.youtube.com/watch?v=iAw_zIg9BqI