GCDAMP Sediment

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Sediment Goal 7 of the DFC's- Maintain or attain levels of sediment storage within the main channel and along shorelines to achieve ecosystem goals.
Sediment Goal 8 of the Strategic Plan- Maintain or attain levels of sediment storage within the main channel and along shorelines to achieve the AMP ecosystem goals.

TBD (Motions)	TBD (TBD)	TBD

GROUP MEMBERS

From: Earth Magazine ---Date: 3/03/2013 -- Subject: Releasing a flood of controversy on the Colorado River
earthmagazine.org/article/releasing-flood-controversy-colorado-river --This article sets the basis for the HFE, provides the history of past HFEs, and discusses the issues. Key Words: Sediment- Fish results- Adaptive Mgt

Eddies occur adjacent to rapids and the flow in the eddy is related to the flow characteristics in the rapid. Sand bars were typically larger before the dam.(Science Background for HFE Planning- Jack Schmidt, GCMRC_KA 2013)
Sediment Presentation- AMWG Jan 2002
Sediment White Paper- AMWG Jan 2002

Information
2011 HFE Protocol EA Sediment Mass Balance for HFE consideratons- Model explaination GCMRC Sediment Link Rapid Response HFE Page
Reports and Links
2015 Updates on 2014 HFE, Paria sediment inputs, and sediment mass balance Alvarez, L.V. (2015) Turbulence, Sediment Transport, Erosion, and Sandbar Beach Failure Processes in Grand Canyon. Ph.D. Dissertation, Arizona State University, Tempe, AZ, 176pp. Grams, P. E., J. C. Schmidt, S. A. Wright, D. J. Topping, T. S. Melis, and D. M. Rubin (2015), Building Sandbars in the Grand Canyon, EOS, Trans. Am. Geophys. Union, 96(11), 12–16. Streamflow, Water Quality, and Sediment Transport in the Colorado River Ecosystem Sandbars and Sediment Storage in Marble and Grand Canyons: Response to Recent High-flow Experiments and Long-term Trends
Other Stuff
2012 HFE SEDIMENT There was 550,000 to 780,000 metric tons essentially sitting on the bed of the Colorado River in Upper Marble Canyon when the HFE was released. Virtually NO additional sediment was in Lower Marble Canyon beyond 30 Mile. The United States Geological Survey estimates that the Colorado River below Glen Canyon Dam only has 6 percent of the sediment that it received before the Glen Canyon Dam was built in the 1960s.