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Deschutes River Continuous Nitrate Monitoring

Publication number Date Published
11-03-030June 2011
VIEW NOW Deschutes River Continuous Nitrate Monitoring (Number of pages: 32) (Publication Size: 1MB)

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Author(s) Sackmann, B.S.
Description In 2009-2010, Ecology deployed a Submersible Ultraviolet Nitrate Analyzer (SUNA) in the Deschutes River at the E. Street Bridge in Tumwater. The Deschutes River is high in nitrate and discharges to south Puget Sound which is sensitive to eutrophication.

The SUNA provided nitrate estimates within 0.05 mg/L of laboratory values and helped:
*Quantify uncertainties associated with nitrate loading estimates derived using more coarsely sampled time series.
*Evaluate the cost-benefit of different sampling strategies.

Monthly sampling provided nitrate load estimates that were within 10% of the true value, whereas a 10-day sampling strategy reduced the uncertainty to 5%.
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Keywords Deschutes, basin, river, water, Ecology, Puget Sound, nitrate
WEB PAGE Deschutes River Continuous Nitrate Monitoring
WATERSHED Water Resource Inventory Area 13 Deschutes
DATA Environmental Information Management (EIM) #BSAC0001


Quality Assurance Project Plan: Deschutes River Continuous Nitrate Monitoring