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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 2 - Geochemistry, Water Quality and Nutrients

Paper Session 4201
Friday, 4/20/07, from 10:00 AM - 11:40 AM


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


Shixiong Hu - East Stroudsburg University
Yong Q Tian - University of Massachusetts - Boston


Shixiong Hu - East Stroudsburg University


  • 10:00 AM Author(s):
    *Christopher J. Woltemade - Shippensburg University
    Jinnieth J. Woodward - SUNY - College of Environmental Science and Forestry
    Abstract Title: Hydrology and Nitrate Removal in a Restored Spring-fed Wetland, Pennsylvania.

  • 10:20 AM Author(s):
    *Yong Q Tian - University of Massachusetts - Boston
    Abstract Title: Spatial and temporal modeling the fate and transport of dissolved organic carbon (DOC) from landscapes to coastal waters.

  • 10:40 AM Author(s):
    *Mark S. Johnson - University of British Columbia
    Johannes Lehamann - Cornell University
    Abstract Title: Decadal Dynamics in Watershed Loadings in a Mixed-Land Use Watershed.

  • 11:00 AM Author(s):
    *Gwenda J Schlomer - Missouri State University
    Robert T Pavlowsky - Missouri State University
    Scott A Lecce - East Carolina University
    Abstract Title: Using geochemical and sedimentological trends to identify pre- and post- settlement boundaries in floodplain deposits of the North Carolina Piedmont.

  • 11:20 AM Author(s):
    *Dan Royall - UNC-Greensboro
    Anita Henderson - UNC-Greensboro
    Zhi-Jun Liu - UNC-Greensboro
    Abstract Title: Downstream Reduction of Urban Influence on Channel Processes: a Case Study.

Session Description: This session will cover the recent development of human impact on geochemical processes, movement of nutrients and water quality issues in watershed.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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