EP041
The role and relevance of thresholds and variability across landscapes
Session ID#: 78359
Session Description:
The form of a landscape reflects the interaction of geomorphic processes and their driving environmental conditions, which vary across space and time. These interactions can be complicated by thresholds for the initiation of landscape change and the variability and sequencing of past geomorphic events. Thresholds can modulate the sensitivity of geomorphic processes to the frequency, magnitude, and sequencing of a particular forcing and thereby filter the environmental signals that shape landscapes. In extreme cases, only the largest infrequent disturbances or extreme events initiate change and drive landscape evolution.
We welcome field, experimental, theoretical, and modeling efforts focused on the determination and characterization of thresholds and variability and their relevance across landscapes. We encourage the submission of studies spanning a range of spatial and temporal scales, from single events occurring at the grain scale to landscape-scale observations that integrate geomorphic response over geologic time.
Index Terms:
1807 Climate impacts [HYDROLOGY]
1817 Extreme events [HYDROLOGY]
1824 Geomorphology: general [HYDROLOGY]
3265 Stochastic processes [MATHEMATICAL GEOPHYSICS]
Primary Convener: Claire C Masteller, Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany
Conveners: Allison M Pfeiffer, University of Washington, Seattle, WA, United States and Kimberly Huppert, Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany
Primary Liaison: Kimberly Huppert, Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany
Storm-induced precipitation variability control of long-term erosion. (496892)
Eric Gayer1, Laurent Michon2, Pascale Louvat3 and Jerome Gaillardet1, (1)Institut de Physique du Globe de Paris, Paris, France, (2)Laboratoire GéoSciences Réunion, Institut de Physique du Globe de Paris, Université de La Réunion, Université de Paris, Saint-Denis, France, (3)Institute de Physique d Globe Paris, Paris, France
Simulating Downstream Impacts from Synthetic Sediment Pulses in the Nisqually River, WA Using a Lagrangian, Bed-material Sediment Transport Model (502869)
Muneer Ahammad1, Jonathan A Czuba1, Allison M Pfeiffer2, Brendan P Murphy3 and Patrick Belmont3, (1)Virginia Tech, Biological Systems Engineering, Blacksburg, VA, United States, (2)Western Washington University, Geology Department, Bellingham, WA, United States, (3)Utah State University, Department of Watershed Sciences, Logan, UT, United States
Sediment Supply and Channel Morphology Feedbacks in Bedrock and Gravel-Bed Rivers (503813)
Edwin Baynes, University of Auckland, Auckland, New Zealand, Heide Friedrich, University of Auckland, Civil and Environmental Engineering, Auckland, New Zealand, Dimitri Lague, CNRS, Paris Cedex 16, France, Philippe Steer, UMR CNRS 6118, University of Rennes 1, Géosciences Rennes, Rennes, France and Stephane Bonnet, Universite de Toulouse, Toulouse, France
The importance and challenge of thresholds in calibrating landscape evolution models (504012)
Katherine R Barnhart, University of Colorado at Boulder, Cooperative Institute for Research in Environmental Sciences, Boulder, CO, United States, Gregory E Tucker, Univ Colorado, Boulder, CO, United States, Sandra G Doty, Univ of Colorado, Boulder, CO, United States, Charles M. Shobe, Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany, Rachel Glade, Los Alamos National Laboratory, Los Alamos, NM, United States, Matthew Rossi, University of Colorado, Earth Lab and CIRES, Boulder, CO, United States and Mary C Hill, University of Kansas, Geology, Lawrence, KS, United States
The impact of sediment supply on rainfall intensity-duration thresholds and debris flow surge properties (509447)
Hui Tang, Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Section 4.7 Earth Surface Process Modelling, Potsdam, Germany, Luke McGuire, University of Arizona, Tucson, AZ, United States, Jason W Kean, USGS, Geologic Hazards Science Center, Golden, CO, United States and Joel Smith, U.S. Geological Survey, Denver, CO, United States
Badland hillslope morphology response to spatio-temporal tectonic uplift (530306)
Ci-Jian Yang, National Taiwan University, Department of Geography, Taipei, Taiwan, Jens Martin Turowski, Helmholtz Centre, German Research Centre for Geosciences (GFZ), Potsdam, Germany, J C Lin, National Taiwan University, Taipei, Taiwan, Chia-Hung Jen, National Kaohsiung Normal University, Kaohsiung, Taiwan and Chun-Wei Tseng, Taiwan Forestry Research Institute, R. O. C. (Taiwan), Taipei, Taiwan
Adjustment of river channel morphology to modes of climate variability (Invited) (534202)
Louise J. Slater, University of Oxford, School of Geography and the Environment, Oxford, United Kingdom, Abdou Khouakhi, Loughborough University, School of Architecture, Civil and Building Engineering, Loughborough, United Kingdom and Robert Wilby, University of Loughborough, Loughborough, United Kingdom
Including localized sediment sources in catchment-scale sediment production and transport modelling (538793)
Giulia Battista1, Peter Molnar1, Fritz Schlunegger2 and Paolo Burlando1, (1)ETH Zurich, Institute of Environmental Engineering, Zurich, Switzerland, (2)University of Bern, Institute of Geological Sciences, Bern, Switzerland
Three Decades of Stream Equilibrium, Disturbance Response, and Recovery in a Forested Mountain Watershed (546448)
Arianna Goodman, Oregon State University, Water Resources Science, Corvallis, OR, United States, Catalina Segura, Oregon State University, Forest Engineering, Resources, and Management; Water Resources Graduate Program, Corvallis, OR, United States and Julia A Jones, Oregon State University, Geography, Corvallis, OR, United States
An Empirical Validation of Channel Geometry Determined by Threshold Shear Stress (557138)
Phillip Choi1, Kieran Bernard Jiamin Dunne2 and Douglas J Jerolmack2, (1)University of Pennsylvania, Philadelphia, PA, United States, (2)University of Pennsylvania, Department of Earth & Environmental Science, Philadelphia, PA, United States
Steady state behavior and initial condition signal shredding in landscape evolution models incorporating lateral incision (557504)
Jeffrey S Kwang, University of Illinois at Urbana Champaign, Department of Civil and Environmental Engineering, Urbana, IL, United States; University of Massachusetts Amherst, Department of Geosciences, Amherst, MA, United States, Abigail L Langston, Kansas State University, Geography, Manhattan, KS, United States and Gary Parker, University of Illinois at Urbana Champaign, Urbana, IL, United States
Modeling Spatial and Temporal Variation in Sediment Balance in the Santa Clara River, CA (565903)
Jordan Gilbert, University of Montana, Missoula, MT, United States and Andrew C Wilcox, University of Montana, Geosciences, Missoula, MT, United States
Fate of rainwater affects landslide occurrence on Reunion Island (586510)
Adrien Sy, Institut de Physique du Globe de Paris, Paris, France, Eric Gayer, Institut de Physique du Globe de Paris, Université de Paris, Paris, France, Reika Yokochi, The University of Chicago, Department of the Geophysical Sciences, Chicago, IL, United States, Laurent Michon, Laboratoire GéoSciences Réunion, Institut de Physique du Globe de Paris, Université de La Réunion, Université de Paris, Saint-Denis, France and Sophie Violette, Sorbonne Université, UFR.918, Paris, France
Landscape Evolution Modeling under Variable Climatic Conditions (616841)
Igor Lisac, GFZ German Research Centre for Geosciences, Earth Surface Process Modelling, Potsdam, Germany, Jean Braun, Universite Joseph Fourier, Grenoble, France, Niels Hovius, Helmholtz Centre, German Research Centre for Geosciences (GFZ), Potsdam, Germany and Eric Deal, Massachusetts Institute of Technology, Department of Earth, Atmospheric and Planetary Sciences, Cambridge, MA, United States
Evolving thresholds for mass-movement following disturbance by wildfire (621052)
Luke McGuire, University of Arizona, Department of Geosciences, Tucson, AZ, United States, Francis K Rengers, U.S. Geological Survey, Geologic Hazards Science Center, Golden, CO, United States and Hui Tang, Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Section 4.7 Earth Surface Process Modelling, Potsdam, Germany
If a tree falls in the forest, can a drone detect it?: Mapping tree uprooting on hillslopes in Southern Indiana, USA with UAV-based LiDAR (622752)
Quinn W Lewis, Indiana University Bloomington, Earth and Atmospheric Sciences, Bloomington, IL, United States, Brian J Yanites, Indiana University Bloomington, Earth and Atmospheric Sciences, Bloomington, IN, United States and Douglas A Edmonds, Indiana University, Department of Earth & Atmospheric Sciences, Bloomington, IN, United States
Interactions among hydrologic and geomorphic thresholds in fluvial landscape evolution (629246)
Matthew W Rossi, University of Colorado at Boulder, Earth Lab, Boulder, CO, United States, Robert S Anderson, INSTAAR and Department of Geological Sciences, Boulder, CO, United States, Suzanne P Anderson, Univ of Colorado, INSTAAR and Dept. of Geography, Boulder, CO, United States and Gregory E Tucker, Univ Colorado, Boulder, CO, United States
Modelling the influence of orographic precipitation on the co-evolution of semi-arid landscapes (629796)
Ankur Srivastava1, Omer Yetemen2, Nikul Kumari1 and Patricia M Saco3, (1)University of Newcastle, Callaghan, Australia, (2)University of Newcastle, Newcastle, NSW, Australia, (3)Univ Newcastle, Callaghan, Australia
