HR: 0800h
AN: B51A-0187    [Abstracts]
TI: Elucidating Sources and Factors Affecting Delivery of Nitrogen to Surface Waters of New York State
AU: * Golden, H E
EM: hegolden@syr.edu
AF: State University of New York College of Environmental Science and Forestry, 203 Marshall Hall, 1 Forestry Drive, Syracuse, NY 13210 United States
AU: Boyer, E W
EM: boyer@nature.berkeley.edu
AF: University of California, Berkeley, 327 Hilgard Hall, Berkeley, CA 94720
AU: Burns, D A
EM: daburns@usgs.gov
AF: US Geological Survey, Watersheds Research Section, 425 Jordan Road, Troy, NY 12180 United States
AU: Elliott, E
EM: eelliott@usgs.gov
AF: US Geological Survey, 345 Middlefield Road, MS 434, Menlo Park, CA 94025 United States
AU: Kendall, C
EM: ckendall@usgs.gov
AF: US Geological Survey, 345 Middlefield Road, MS 434, Menlo Park, CA 94025 United States
AU: Butler, T
EM: tjb2@cornell.edu
AF: Institute of Ecosystem Studies and Cornell University, Rice Hall, Ithaca, NY 14853 United States
AB: Rapid changes in power generation, transportation, and agriculture have appreciably altered nitrogen (N) cycling at regional scales, increasing N inputs to landscapes and surface waters. Numerous studies have linked this surplus N to a host of concerns, including eutrophication and violations in drinking water standards. Inputs of N nation-wide have increased during recent decades, primarily from the production and use of fertilizers, the planting of N-fixing crops, and the combustion of fossil fuels. The role of atmospheric N sources is of particular concern in New York, as rates of atmospheric N deposition in the northeast are among the highest in the nation. Our work aims to quantify nitrogen sources and fate in watersheds throughout the state. Further, we intend to elucidate factors controlling the retention and release of N to surface waters. We quantify nitrogen inputs through both measurement data (e.g., from wet and dry atmospheric deposition, precipitation, streamflow, water quality, and isotopic tracers) and from synoptic spatial databases (e.g., of terrain, land use, and fertilizer inputs). We present preliminary results from large catchments in contrasting spatial settings across the state (different land use configurations and atmospheric deposition gradients), illustrating the contribution of nitrogen sources to each region and factors affecting delivery to surface waters. Further, we present 30 years of temporal data from a large watershed (Fall Creek) in the Finger Lakes region of the state to demonstrate how hydrological and biogeochemical factors, over seasons and under varying hydrological regimes, combine to control N dynamics in surface waters. Our collective work provides information that is necessary to develop sound strategies for understanding and managing nutrients at regional scales.
DE: 1871 Surface water quality
DE: 4845 Nutrients and nutrient cycling (0470, 1050)
DE: 4850 Marine organic chemistry (0470, 1050)
SC: Biogeosciences [B]
MN: Fall Meeting 2005