HR: 0800h
AN: H51H-0861    [Abstracts]
TI: Changes in N and P Fluxes due to Agricultural Land Use in the Mississippi River System
AU: * Oh, N
EM: neung-hwan.oh@yale.edu
AF: Yale University, 205 Proscpect St., New Haven, CT 06511, United States
AU: Raymond, P A
EM: peter.raymond@yale.edu
AF: Yale University, 205 Proscpect St., New Haven, CT 06511, United States
AB: Riverine flux is one of the most important terms balancing many global elemental cycles including nitrogen and phosphorus. Using US Geological Survey Water Data and a variety of GIS layers including yearly precipitation, we investigated the agricultural land use effects on both riverine discharge and fluxes of N and P from the Mississippi River system. Results demonstrate that there has been a large increase in water discharge due to agricultural land use and that the changes in discharge affected fluxes of N and P significantly. Dependency of the fluxes on regions and spatial variation will be discussed.
DE: 0402 Agricultural systems
DE: 0469 Nitrogen cycling
DE: 0470 Nutrients and nutrient cycling (4845, 4850)
DE: 1655 Water cycles (1836)
DE: 1813 Eco-hydrology
SC: Hydrology [H]
MN: 2007 Fall Meeting