GCDAMP Sediment

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DFC: Maintain or attain levels of sediment storage within the main channel and along shorelines to achieve ecosystem goals.

TBD (Motions)	TBD (TBD)	TBD

GROUP MEMBERS TWG Sediment Ad-Hoc Group formed November 8, 2001 News Quick Facts 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 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. History

ADDITIONAL-------------------------------> Information Paria River sediment gage Click here to calculate how much sediment has come in from the Paria River. The HFE Page See summaries from past HFEs Water Flow Gages</h2> Lake Powell Water Level Graphs Colorado River at Lees Ferry Paria River at Lees Ferry Colorado River at 30 mile Colorado River above LCR LCR at Colorado River Colorado River at Bright Angel Creek Bright Angel Creek Shinumo Creek Colorado River abv Lava Canyon rm66 Colorado River bl rm127 Kanab Creek Havasu Creek Colorado River abv National Canyon Colorado River bl Diamond Creek Colorado River abv Spencer rm246 Lake Mead Water Level Graphs Information Paria River sediment gage Click here to calculate how much sediment has come in from the Paria River. The HFE Page See summaries from past HFEs Water Flow Gages</h2> Lake Powell Water Level Graphs Colorado River at Lees Ferry Paria River at Lees Ferry Colorado River at 30 mile Colorado River above LCR LCR at Colorado River Colorado River at Bright Angel Creek Bright Angel Creek Shinumo Creek Colorado River abv Lava Canyon rm66 Colorado River bl rm127 Kanab Creek Havasu Creek Colorado River abv National Canyon Colorado River bl Diamond Creek Colorado River abv Spencer rm246 Lake Mead Water Level Graphs Reports and Links 2016 Project 2: Streamflow, Water Quality, Sediment Transport, and Sand Budgets in the Colorado River Ecosystem Sandbars and Sediment Storage in Marble and Grand Canyons: Response to Recent high-flow Experiments and Long-Term Trends Observations of sand dune migration on the Colorado River in Grand Canyon using high-resolution multibeam bathymetry 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