Combined Impact of Spatial Scale, Land Use, and Climate on Streamflow and Nitrogen: A Comparative Analysis
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PublisherThe University of Arizona.
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AbstractCatchments of different spatial scale, land use, and climate are characterized by highly variable N fluxes. In order to understand these controls on nitrogen flux, Total Dissolved Nitrogen (TDN) budgets were quantified and analyzed for fifty seven different catchments around the world. These catchments have a wide range of spatial scales, land uses, and climates. Results demonstrate that each variable in our analysis (i.e. spatial scale, land use, and climate) imposes a specific impact on TDN yield though their impact is not similar. For example, climate is the strongest and most significant driver for TDN yield followed by catchment area and land use. Importantly, based on current study analysis, degree of perturbation of a catchment can be determined on the basis of only a few measurements of discharge and corresponding TDN concentration at a certain point (e.g. outlet of a catchment).
Degree ProgramGraduate College