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Special Sessions
Sponsored by the Geomorphology Specialty Group
Association of American Geographers 103rd Annual Meeting
San Francisco, California, April 17-21.

Human Impacts on Watershed Processes 1 - Mountain Watersheds

Paper Session 4101
Friday, 4/20/07, from 8:00 AM - 9:40 AM


Geomorphology Specialty Group
Mountain Geography Specialty Group
Water Resources Specialty Group


John Faustini - Oregon State University
Julia Jones - Oregon State University


Julia Jones - Oregon State University


  • 8:00 AM Introduction:
    John Faustini - Oregon State University
  • 8:10 AM Author(s):
    *Anne Chin - Texas A&M University and National Science Foundation
    Peng Gao - Syracuse University
    Abstract Title: Modeling step-pool sequences in mountain watersheds.

  • 8:30 AM Author(s):
    *Francis Kevin Rengers - Engineering and Hydrosystems, Inc.
    Jennifer M Patterson - Engineering and Hydrosystems, Inc.
    Abstract Title: A Method for Quantifying Geomorphic Change in Fluvial Systems.

  • 8:50 AM Author(s):
    *John M. Faustini - Oregon State University
    Philip R. Kaufmann - U.S. Environmental Protection Agency
    Abstract Title: Land Use Impacts on Stream Bed Substrate Influenced by Geology in the John Day Basin, Oregon.

  • 9:10 AM Author(s):
    *Timothy D. Perry - Oregon State University
    *Aaron Stone Arthur - Oregon State University
    Julia A. Jones - Oregon State University
    Abstract Title: Long-term responses to forest thinning and clearcut treatments from the Coyote Creek paired watershed study, revived after a 25-year nap, Southwestern Oregon.

Session Description: Human impacts are pervasive across the modern landscape. Land use, resource extraction, and other human activities alter vegetation cover and species distributions; alter surface topography and disrupt soil layers; move large quantities of rock, soil and other materials; re-route surface and subsurface water flows; and directly or indirectly introduce large quantities of chemicals across the landscape, among other impacts. These many impacts affect key watershed processes even in relatively remote areas, altering the routing and delivery of water, sediment, organic matter, and dissolved chemicals to rivers and streams and in turn altering channel and floodplain morphology, aquatic habitat quality, and riparian ecosystem structure and function. Because humans depend upon watersheds for water supply, recreation, and many ecosystem services, understanding and management of human impacts on watershed processes is profoundly important to human societies. This series of sessions explores human impacts to hydrogeomorphic, biogeochemical, and ecological systems and processes in watersheds in a range of environments. Primary focus areas include (1) mountain watersheds; (2) geochemistry, water quality, and nutrients; (3) watershed management, particularly with respect to streamflow and fluvial processes in urbanizing landscapes; and (4) ecological impacts and processes.

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