Interpreting Hydraulic Conditions from Morphology, Sedimentology, and Grain Size of Sand Bars in the Colorado River in Grand Canyon

David M Rubin1, David J. Topping2, John C Schmidt3, Paul E Grams4, Daniel Buscombe2, Amy E East5 and Scott A Wright6, (1)University of California Santa Cruz, Earth & Planetary Sciences, Santa Cruz, CA, United States, (2)USGS Grand Canyon Monitoring and Research Center, Southwest Biological Science Center, Flagstaff, AZ, United States, (3)Utah State University, Watershed Sciences, Logan, United States, (4)U.S. Geological Survey Southwest Biological Science Center, Grand Canyon Monitoring and Research Center, Flagstaff, United States, (5)U.S. Geological Survey, Santa Cruz, United States, (6)U.S. Geological Survey, Sacramento, CA, United States