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X Demographics
Mendeley readers
Attention Score in Context
| Title |
Factors Affecting Stream Nutrient Loads: A Synthesis of Regional SPARROW Model Results for the Continental United States1
|
|---|---|
| Published in |
Journal of the American Water Resources Association, August 2011
|
| DOI | 10.1111/j.1752-1688.2011.00577.x |
| Pubmed ID | |
| Authors |
Stephen D. Preston, Richard B. Alexander, Gregory E. Schwarz, Charles G. Crawford |
| Abstract |
We compared the results of 12 recently calibrated regional SPARROW (SPAtially Referenced Regressions On Watershed attributes) models covering most of the continental United States to evaluate the consistency and regional differences in factors affecting stream nutrient loads. The models - 6 for total nitrogen and 6 for total phosphorus - all provide similar levels of prediction accuracy, but those for major river basins in the eastern half of the country were somewhat more accurate. The models simulate long-term mean annual stream nutrient loads as a function of a wide range of known sources and climatic (precipitation, temperature), landscape (e.g., soils, geology), and aquatic factors affecting nutrient fate and transport. The results confirm the dominant effects of urban and agricultural sources on stream nutrient loads nationally and regionally, but reveal considerable spatial variability in the specific types of sources that control water quality. These include regional differences in the relative importance of different types of urban (municipal and industrial point vs. diffuse urban runoff) and agriculture (crop cultivation vs. animal waste) sources, as well as the effects of atmospheric deposition, mining, and background (e.g., soil phosphorus) sources on stream nutrients. Overall, we found that the SPARROW model results provide a consistent set of information for identifying the major sources and environmental factors affecting nutrient fate and transport in United States watersheds at regional and subregional scales. |
X Demographics
The data shown below were collected from the profile of 1 X user who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 1 | 100% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 1 | 100% |
Mendeley readers
The data shown below were compiled from readership statistics for 146 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 5 | 3% |
| Ireland | 1 | <1% |
| Canada | 1 | <1% |
| Italy | 1 | <1% |
| Spain | 1 | <1% |
| China | 1 | <1% |
| Unknown | 136 | 93% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Researcher | 36 | 25% |
| Student > Ph. D. Student | 29 | 20% |
| Student > Master | 24 | 16% |
| Professor | 8 | 5% |
| Student > Doctoral Student | 5 | 3% |
| Other | 18 | 12% |
| Unknown | 26 | 18% |
| Readers by discipline | Count | As % |
|---|---|---|
| Environmental Science | 51 | 35% |
| Earth and Planetary Sciences | 20 | 14% |
| Engineering | 18 | 12% |
| Agricultural and Biological Sciences | 12 | 8% |
| Computer Science | 4 | 3% |
| Other | 8 | 5% |
| Unknown | 33 | 23% |
Attention Score in Context
This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 20 September 2011.
All research outputs
#20,930,935
of 25,707,225 outputs
Outputs from Journal of the American Water Resources Association
#1,045
of 1,184 outputs
Outputs of similar age
#112,241
of 135,108 outputs
Outputs of similar age from Journal of the American Water Resources Association
#9
of 9 outputs
Altmetric has tracked 25,707,225 research outputs across all sources so far. This one is in the 10th percentile – i.e., 10% of other outputs scored the same or lower than it.
So far Altmetric has tracked 1,184 research outputs from this source. They typically receive a little more attention than average, with a mean Attention Score of 6.8. This one is in the 7th percentile – i.e., 7% of its peers scored the same or lower than it.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 135,108 tracked outputs that were published within six weeks on either side of this one in any source. This one is in the 7th percentile – i.e., 7% of its contemporaries scored the same or lower than it.
We're also able to compare this research output to 9 others from the same source and published within six weeks on either side of this one.