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Regional SPARROW Model Assessments of Streams and Rivers

Pacific Northwest (More Regional Models)

Surface-Water Nutrient Conditions and Sources in the United States Pacific Northwest

by Daniel R. Wise and Henry M. Johnson
Article and supplemental material

Online Decision Support System (Guidance Document)-- Informing Nutrient Management Decisions

The regional nitrogen and phosphours SPARROW models have been incorporated into an interactive, online decision support system so water managers, researchers, and the general public can access SPARROW models and map predictions of long-term average water quality conditions, track transport to downstream receiving waters, and evaluate management source-reduction scenarios.

Total nitrogen Total Phospohorus

mapperSPARROW Map Results

These interactive maps show the primary sources of total nitrogen and total phosphorus delivered to streams along with watershed level estimates of nutrient export and enrichment.


Related Links

For additional information on the study:

Daniel Wise,
Henry Johnson,

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