EP34A:
Sediment Size Input to Fluvial Networks: Production, Transformation, Delivery, and Effects II

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Session ID#: 18107

Session Description:
The size of sediments entering channels is a key control on river morphodynamics across a range of scales, from channel response to human land use to landscape response to changes in tectonic and climatic forcing. However, very little is known about what controls the size distribution of particles eroded from bedrock on hillslopes, and how particle sizes evolve before sediments are delivered to channels. Sediment size supplied to channels should depend on the climatic, lithologic, biotic, tectonic, and geomorphic factors that control chemical and physical weathering and hillslope sediment transport, yet few data or models are available to predict hillslope sediment size.  We invite contributions from field, theoretical, experimental and numerical approaches that further our understanding of the controls on (1) spatial and temporal variations in the size distribution of sediment supplied to river networks, and (2) how variations in hillslope sediment size impact river morphodynamics and the sedimentary record.
Primary Convener:  Mikael Attal, University of Edinburgh, School of GeoSciences, Edinburgh, EH9, United Kingdom
Conveners:  Mikael Attal, University of Edinburgh, School of GeoSciences, Edinburgh, EH9, United Kingdom, Leonard S Sklar, San Francisco State University, Earth & Climate Sciences, San Francisco, CA, United States and Clifford S Riebe, University of Wyoming, Laramie, United States
Chairs:  Mikael Attal, University of Edinburgh, School of GeoSciences, Edinburgh, EH9, United Kingdom and Leonard S Sklar, San Francisco State University, Earth & Climate Sciences, San Francisco, CA, United States
OSPA Liaison:  Mikael Attal, University of Edinburgh, School of GeoSciences, Edinburgh, EH9, United Kingdom

Cross-Listed:
  • H - Hydrology
  • T - Tectonophysics
Index Terms:

1625 Geomorphology and weathering [GLOBAL CHANGE]
1815 Erosion [HYDROLOGY]
1865 Soils [HYDROLOGY]
8175 Tectonics and landscape evolution [TECTONOPHYSICS]

Abstracts Submitted to this Session:

Exploring How Weathering Related Stresses and Subcritical Crack Growth May Influence the Size of Sediment Produced From Different Rock Types. (Invited) (118166)
Martha Cary Eppes1, Bernard Hallet2, Gregory S Hancock3, Peter Mackenzie-Helnwein4 and Russell Keanini1, (1)University of North Carolina at Charlotte, Charlotte, NC, United States, (2)University of Washington, Earth and Space Sciences, Seattle, WA, United States, (3)College William & Mary, Williamsburg, VA, United States, (4)University of Washington, Department of Civil and Environmental Engineering, Seattle, WA, United States
Spatial variations in the size distribution of sediment supplied to channels: A synthesis of detrital thermochronometry from 11 size classes in Inyo Creek, California (150454)
Claire E Lukens, University of Wyoming, Life and Environmental Sciences, Laramie, United States, David L Shuster, University of California Berkeley, Department of Earth and Planetary Science, Berkeley, CA, United States, Leonard S Sklar, San Francisco State University, San Francisco, CA, United States and Clifford S Riebe, University of Wyoming, Laramie, United States
A Modeling Framework for Predicting the Size of Sediments Produced on Hillslopes and Supplied to Channels (160276)
Leonard S Sklar and Mobin Mahmoudi, San Francisco State University, San Francisco, CA, United States
Inverse modelling of fluvial sediment connectivity identifies characteristics and spatial distribution of sediment sources in a large river network. (128640)
Rafael J. P. Schmitt1, Simone Bizzi2, G Mathias Kondolf3, Zan Rubin4 and Andrea Castelletti1, (1)Politecnico di Milano, Milano, Italy, (2)Joint Research Center Ispra, Ispra, Italy, (3)University of California Berkeley, Berkeley, CA, United States, (4)Organization Not Listed, Washington, DC, United States

Universal shape evolution of particles by bed-load (Invited) (121457)

Douglas J Jerolmack1, Gabor Domokos2, Sam Shaw3, Andras Sipos2 and Timea Szabo2, (1)University of Pennsylvania, Department of Mechanical Engineering and Applied Mechanics, Philadelphia, United States, (2)Budapest University of Technology and Economics, Budapest, Hungary, (3)University of Oregon, Eugene, OR, United States
A toolbox for computing pebble shape and roundness indexes: experimental tests and recommendations for future applications. (123661)
Mathieu Cassel, Ecole Normale Supérieure Lyon, Lyon, France, Hervé Piegay, CNRS, Paris Cedex 16, France and Jerome Lave, CRPG Centre de Recherches Pétrographiques et Géochimiques, Vandoeuvre-Les-Nancy, France
Where does all the gravel go? Abrasion-set limits on Himalayan bedload flux  (141415)
Elizabeth Dingle1, Mikael Attal2 and Hugh Denny Sinclair2, (1)Simon Fraser University, Department of Geography, Burnaby, Canada, (2)University of Edinburgh, School of GeoSciences, Edinburgh, EH9, United Kingdom

See more of: Earth and Planetary Surface Processes