Evidence details

rebecca.killalea@canberra.edu.au on 09 Apr 2022
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Study

Citation
Hobbie, S. E., Finlay, J. C., Janke, B. D., Nidzgorski, D. A., Millet, D. B., & Baker, L. A. (2017). Contrasting nitrogen and phosphorus budgets in urban watersheds and implications for managing urban water pollution. Proceedings of the National Academy of Sciences.
Study description
This study investigated the inputs and outputs of phosphorus and nitrogen into a watershed in Minnesota. The study looked at the dominant methods of input, retention of nutrients within the catchment and the output to the downstream waterways.

Response

Cause term/trajectory
Other
Cause description
Atmospheric deposition
Effect term/trajectory
Sediment quality - nutrients (nitrogen)
Effect description
Nitrogen input to the watershed. This study found that atmospheric deposition input the second most nitrogen into the watershed over the 7 catchments (contributing 19-34% of N inputs)
Response measure type
Other
Response measure description
Nutrient inputs were modelled based on a variety of information available within the watersheds and scaled according to land cover and land use estimates made in GIS. No statistical analyses noted in article for this relationship.

Design

Source data
Other
Study type
Model
Study design
Other
Number of independent control or reference sampling units
7
Sample size used in analysis
7
Design description
Source data varies for different inputs. 7 different watersheds analysed.

Context

Climate
Cold (continental)
Country
United States
Habitat
Stream/river
Spatial extent
Drainage basin
Temporal extent
Other