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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 4 - Ecological Aspects

Paper Session 4401
Friday, 4/20/07, from 2:00 PM - 3:40 PM

Sponsorship(s):

Geomorphology Specialty Group
Water Resources Specialty Group
Spatial Analysis and Modeling Specialty Group

Organizer(s):

John Faustini - Oregon State University
Shixiong Hu - East Stroudsburg University

Chair(s):

John Faustini - Oregon State University

Abstract(s):

  • 2:00 PM Author(s):
    *Luc Claessens - University of Connecticut
    Christina Tague - University of California Santa Barbara
    Abstract Title: Hydro-Ecological Linkages in Nitrogen Export from Urbanizing Watersheds.


  • 2:20 PM Author(s):
    *Shixiong Hu - East Stroudsburg University
    Jerilyn Jewett-Smith - East Stroudsburg University
    Abstract Title: Study on Environmental Controlling Factors for Spread of Invasive Riparian Plants in the Paradise Watershed, PA.


  • 2:40 PM Author(s):
    Nicole M Czarnomski - Oregon State University
    David M Dreher - Oregon State University
    *Julia Jones - Oregon State University
    Frederick J Swanson - US Forest Service Pacific Northwest Research Station
    Abstract Title: Landscape-scale dynamics of wood in stream networks of the western Cascades, Oregon.


  • 3:00 PM Author(s):
    *Jerry D. Davis - San Francisco State University
    Abstract Title: Biogeomorphic Riparian Assessment and Salmonid Habitat Enhancement in a Suburban Landscape: San Pedro Creek Watershed.



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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