EP51E:
Response of Earth Surface and Subsurface Processes to Rare, Extreme Events I

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Session ID#: 35452

Session Description:
Earthquakes, wildfire, typhoons, floods, and other catastrophic events can profoundly impact earth surface and subsurface processes, such as sediment transport, erosion, deposition, hydrology, and weathering. The rarity of these high-magnitude perturbations on human time-scales makes them difficult to study, yet such events may be important to earth surface processes over geological time-scales. At the scale of a mountain range, the temporal and spatial clustering of these events lead to transient landscape dynamics that could overprint signals of long-term landscape evolution. For example, increases in erosion following severe, infrequent wildfires may account for the majority of long-term denudation in certain settings. This session seeks to bring together researchers studying the impact of extreme events on earth surface processes over a range of temporal and spatial scales: from those studying contemporary processes by which extreme events affect landscapes and create hazards to those that focus on impacts over geological time.
Primary Convener:  Luke McGuire, University of Arizona, Department of Geosciences, Tucson, United States
Conveners:  Sean F Gallen1, Katherine Schide1 and Petter Nyman2, (1)ETH Swiss Federal Institute of Technology Zurich, Geological Institute, Zurich, Switzerland(2)University of Melbourne, School of Ecosystem and Forest Sciences, Parkville, VIC, Australia
Chairs:  Luke McGuire, University of Arizona, Department of Geosciences, Tucson, United States and Sean F Gallen, ETH Swiss Federal Institute of Technology Zurich, Geological Institute, Zurich, Switzerland
OSPA Liaison:  Luke McGuire, University of Arizona, Department of Geosciences, Tucson, United States

Cross-Listed:
  • H - Hydrology
  • NH - Natural Hazards
Index Terms:

1815 Erosion [HYDROLOGY]
1817 Extreme events [HYDROLOGY]
1824 Geomorphology: general [HYDROLOGY]
4313 Extreme events [NATURAL HAZARDS]

Abstracts Submitted to this Session:

Hydrologic and Geomorphic Impacts of Glacial Lake Outburst Floods From Low-Order Tributaries (Invited) (236760)
Scott W McCoy, University of Nevada Reno, Department of Geological Sciences and Engineering, Reno, United States, Jonathan Jacquet, University of Nevada Reno, Reno, NV, United States, Daniel McGrath, Colorado State University, Department of Geosciences, Fort Collins, United States, David L George, USGS Cascades Volcano Observatory, Vancouver, United States, Robert Koschitzki, Technische Universität Dresden, Dresden, Germany, David Nimick, USGS, WY - MT Water Science Center, Helena, MT, United States, Mark J. Fahey, Special Applications Science Center, Denver, CO, United States and Jorge Okuinghttons, Ministry of Public Works, Santiago, Chile
Evidence for late Pliocene deglacial megafloods in the Gulf of Mexico (237630)
Zexuan Wang1,2 and M Royhan Gani1, (1)Western Kentucky University, Department of Geography and Geology, Bowling Green, KY, United States, (2)University of Oklahoma, ConocoPhillips School of Geology and Geophysics, Norman, OK, United States
Glacial lake outburst floods and fluvial erosion in the Himalaya – insights from the 2016 Bhote Koshi GLOF (213074)
Kristen L Cook, IRD, ISTerre, Université Grenoble Alpes, Meylan, France, Florent Gimbert, University Grenoble Alpes, CNRS, IRD, Grenoble INP, IGE, Grenoble, France, Christoff Andermann, German Research Centre for Geosciences GFZ, Potsdam, Germany, Niels Hovius, Deutsches GeoForschungsZentrum GFZ, Section 4.6 Geomorphology, Potsdam, Germany and Basanta Raj Adhikari, Sichuan University, Institute for Disaster Management and Reconstruction, Chengdu, China
Debris flows associated with the 2015 Gorkha Earthquake in Nepal (300571)
A. Joshua West1, Maxwell Philip Dahlquist1 and Julie Martinez2, (1)University of Southern California, Los Angeles, CA, United States, (2)Alliance Susan and Eric Smidt Technology High School, Los Angeles, CA, United States
The Influence of Wildfire on Long-Term Erosion: Insights from the Jemez Mountains, NM and the Western USA (Invited) (295621)
Erin P Fitch, Hawai'i Institute of Geophysics and Planetology, Honolulu, HI, United States and Grant A Meyer, University of New Mexico Main Campus, Albuquerque, NM, United States
Geomorphic Complexity of Sequential Fire and Floods in Mountain Watersheds (226580)
Daniel Joseph Brogan1, Peter A Nelson2, Lee H MacDonald3 and Jacob Alan Morgan1, (1)Colorado State University, Fort Collins, CO, United States, (2)Colorado State University, Civil and Environmental Engineering, Fort Collins, United States, (3)Colorado State University, Fort Collins, United States
Discharge variability and bedrock river incision on the Hawaiian island of Kaua’i (276460)
Huppert Kim1, Eric Deal2, J Taylor Perron3, Ken Ferrier4 and Jean Braun1, (1)Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany, (2)Massachusetts Institute of Technology, Earth, Atmospheric, and Planetary Sciences, Cambridge, United States, (3)Massachusetts Institute of Technology, Department of Earth, Atmospheric, & Planetary Sciences, Cambridge, United States, (4)Georgia Institute of Technology, Earth and Atmospheric Sciences, Atlanta, GA, United States
Global hotspots of river erosion under global warming (287233)
Piret Plink-Bjorklund, Colorado School of Mines, Geology and Geological Engineering, Golden, CO, United States and Thomas Reichler, University of Utah, Salt Lake City, UT, United States

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