EP42B:
Sorting by Particle Property and Other "Granular" Mechanisms and Their Influence on Earth and Planetary Surface Processes I

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Session ID#: 35609

Session Description:
Sorting of particles by size, density and other properties plays a significant role in earth and planetary surface processes. As consituents unmix, they influence other dynamics from transport rates to average and extreme stresses. For example: Sorting of a wide range of grain sizes results in patterns such as armoring, gravel patch formation, and downstream fining and modifies bedload and suspension fluxes; Sorting in a debris flow gives rise to a well-known coarsening of the front or snout, affecting bed erosion and other geomorphological effects and hazards; Sorting of particles also plays a role in hazards associated with snow avalanches, pyroclastic flows, rock avalanches, and other geophysical flows. This session involves experimental, theoretical, numerical and field-based contributions on grain sorting behaviors and their influence on earth surface processes. Research is most welcomed at different scales, from the grain to the basin and within different environments, including coasts, estuaries, rivers, mountains....
Primary Convener:  Kimberly M Hill, University of Minnesota, Minneapolis, MN, United States
Conveners:  Enrica Viparelli, University of South Carolina, Civil and Environmental Engineering, Columbia, SC, United States, Roland Kaitna, BOKU University of Natural Resources and Life Sciences, Institute of Mountain Risk Engineering, Vienna, Austria and Philippe Frey, Univ. Grenoble Alpes, IRSTEA, Grenoble, France
Chairs:  Kimberly M Hill, University of Minnesota, Minneapolis, MN, United States and Roland Kaitna, BOKU University of Natural Resources and Life Sciences, Institute of Mountain Risk Engineering, Vienna, Austria
OSPA Liaison:  Enrica Viparelli, University of South Carolina, Civil and Environmental Engineering, Columbia, SC, United States
Index Terms:

1826 Geomorphology: hillslope [HYDROLOGY]
1862 Sediment transport [HYDROLOGY]
4302 Geological [NATURAL HAZARDS]
4460 Pattern formation [NONLINEAR GEOPHYSICS]

Abstracts Submitted to this Session:

Segregation-mobility feedback for bidisperse shallow granular flows: Towards understanding segregation in geophysical flows (Invited) (267200)
Anthony Thornton1, Irana Denissen2, Thomas Weinhart1 and Kasper Van der Vaart3, (1)University of Twente, Enschede, Netherlands, (2)University of Twente, Enschede, 7500, Netherlands, (3)Stanford University, Stanford, CA, United States
Slow sedimentary processes on-a-chip: experiments on porous flow effects on granular bed creep (Invited) (225843)
Morgane Houssais1, Charles Maldarelli2, Mark Shattuck3 and Jeffrey F. Morris2, (1)Clark University, Physics, Worcester, United States, (2)CUNY City College of New York, Chemical Engineering, New York, NY, United States, (3)CUNY City College of New York, Physics, New York, NY, United States
Equal Susceptibility and Size-selective Mobility in Aeolian Saltation (233807)
Raleigh L. Martin, University of California Los Angeles, Atmospheric and Oceanic Sciences, Los Angeles, CA, United States and Jasper F Kok, University of California Los Angeles, Department of Atmospheric and Oceanic Sciences, Los Angeles, CA, United States
On the Internal Structure of Mobile Barchan Sand Dunes due to Granular Processes (252045)
Nathalie M Vriend1, Matthew Arran2, Michel Yves Louge3, Anthony G Hay3 and Alexandre Valance4, (1)University of Cambridge, Cambridge, United Kingdom, (2)University of Cambridge, DAMTP, Cambridge, United Kingdom, (3)Cornell University, Ithaca, NY, United States, (4)University of Rennes, Physics, Rennes Cedex, France
Feedback effect of base roughness on particle size segregation in bidisperse granular avalanche (253237)
Fiona Kwok1,2 and Dr. Lu Jing1,3, (1)Sichuan University, State Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resource and Hydropower, Chengdu, China, (2)The University of Hong Kong, Civil Engineering, Hong Kong, Hong Kong, (3)Tsinghua University, Tsinghua Shenzhen International Graduate School, Beijing, China
The role of particle jamming on the formation and stability of step-pool morphology: insight from a reduced-complexity model (254225)
Matteo Saletti, University of British Columbia, Vancouver, BC, Canada, Peter Molnar, ETH Zurich, Institute of Environmental Engineering, Zurich, Switzerland and Marwan A Hassan, University of British Columbia, Department of Geography, Vancouver, BC, Canada
The transition from intermittent to continuous bed-load transport arises from merger of "bursty" transport events (245531)
Dylan Bentley Lee, University of Pennsylvania, Department of Earth & Environmental Science, Philadelphia, PA, United States and Douglas J Jerolmack, University of Pennsylvania, Department of Earth and Environmental Science, Philadelphia, United States
Gravel Mobility in a High Sand Content Riverbed (272223)
J.K. Haschenburger, University of Texas at San Antonio, San Antonio, United States
Modeling of Downstream Fining by Selective Sorting in Rivers with a Unimodal Sand-Gravel Supply: Can Gravel-Sand Transitions form Autogenically? (234236)
Gary Parker, University of Illinois at Urbana Champaign, Earth Science and Environmental Change & Civil and Environmental Engineering, Urbana, United States and Michael P Lamb, California Institute of Technology, Geological and Planetary Sciences, Pasadena, United States
Age-based morphodynamic formulation for streamwise and vertical advection and dispersion of tracer particles in rivers (252172)
Anna Pelosi, University of Salerno, Department of Civil Engineering, Salerno, Italy, Rina Schumer, Desert Research Institute, Reno, NV, United States, Hongbo Ma, Rice University, Earth, Environmental and Planetary Sciences, Houston, TX, United States and Gary Parker, University of Illinois at Urbana Champaign, Earth Science and Environmental Change & Civil and Environmental Engineering, Urbana, United States
Statistically Based Morphodynamic Modeling of Tracer Slowdown (255511)
Sanaz Borhani, University of South Carolina, Columbia, SC, United States, Amirreza Ghasemi, University of Minnesota, Minnesota, MN, United States, Kimberly M Hill, University of Minnesota, Minneapolis, MN, United States and Enrica Viparelli, University of South Carolina, Civil and Environmental Engineering, Columbia, SC, United States
Discrete Element Method Modeling of Bedload Transport: Towards a physics-based link between bed surface variability and particle entrainment statistics (300376)
Amirreza Ghasemi, University of Minnesota, Minnesota, MN, United States, Sanaz Borhani, University of South Carolina, Columbia, SC, United States, Enrica Viparelli, University of South Carolina, Civil and Environmental Engineering, Columbia, SC, United States and Kimberly M Hill, University of Minnesota, Minneapolis, MN, United States

See more of: Earth and Planetary Surface Processes