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Quality Assurance Project Plan: Puget Sound Spatially Referenced Regression on Watershed Attributes (SPARROW)

Publication number Date Published
22-03-109October 2022
VIEW NOW Quality Assurance Project Plan: Puget Sound Spatially Referenced Regression on Watershed Attributes (SPARROW) (Number of pages: 76) (Publication Size: 4660KB)

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Author(s) Figueroa-Kaminsky, C., J. Wasielewski, N. Schmadel, S. McCarthy, D. Wise, Z. Johnson, and R. Black
Description The US Geological Survey (USGS) and the Washington State Department of Ecology are collaborating on the development of refined, seasonal load estimates of total nitrogen and total phosphorus within watersheds draining to Washington waters of the Salish Sea for the years 2005–2020. The modeling approach for this work is based on SPARROW (Spatially Referenced Regression on Watershed Attributes), a watershed modeling technique developed by the USGS. SPARROW is typically used to estimate stream loads throughout a stream network.

The estimated loads will be used within the context of the Puget Sound Nutrient Source Reduction Project to evaluate the influence of watershed contributions of nutrients throughout the stream network and to marine waters. This quality assurance project plan contains details about the technical approach, observational data, spatial and temporal source data, limitations, and quality assurance procedures that will be employed to develop the SPARROW models, so that they can be used to inform additional actions to address excess nutrients.
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Keywords watershed loads, SPARROW, Salish Sea, marine waters, nitrogen, model, quality assurance project plan, streams, Puget Sound, phosphorus, nutrient, nutrient loading
WEB PAGE Puget Sound Nutrient Reduction Project

Puget Sound Nutrient Synthesis Report, Part 2: Comparison of Watershed Nutrient Load Estimates