Publications Home

Publication Summary


Deschutes River Continuous Nitrate Monitoring

Publication number Date Published
11-03-030June 2011
VIEW NOW: Acrobat PDF format (Number of pages: 32) (Publication Size: 1MB)

Trouble viewing?
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%.
REQUEST A COPY The mission of the Department of Ecology is to protect, preserve, and enhance Washington’s environment. To help us meet that goal, please consider the environment before you print or request a copy.

Accessibility Options
Persons with hearing loss can call 711 for Washington Relay Service
Persons with a speech disability can call 877-833-6341
Contact Joan LeTourneau at 360-407-6764 or
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