Marine Data Products

Citizen Monitoring
Profiles
Time Series

ORCA Buoy
Profiles
Time Series

MMP Profiler + ADCP

Historical Comparisons

Comparative Cross-Sections

Freshwater & Terrestrial Data Products

Freshwater Sampling

Land Use

Geology

Marine Life Studies

Diver Observations

Bloom & Fish Kill Observations

Data Access

Currently, several agencies and non-profit organizations affiliated with the Hood Canal Dissolved Oxygen Project (HCDOP) are working together to facilitate the collection of ambient, monthly chemical data from at least 37 of the streams and rivers that drain into Hood Canal. Sampling groups include the following: Hood Canal Salmon Enhancement Group, University of Washington, Mason County Environmental Health, Mason Conservation District, Kitsap County Health District, Jefferson Conservation District, EnviroVision Corporation, Washington Department of Ecology, and the Skokomish Tribe. Samples are generally collected near the mouth of a stream or river, although some locations are located farther upstream to avoid tidal influence. HCDOP intends to supplement this monthly monitoring scheme with a stormwater sampling strategy (that is, an effort to sample streams during and soon after storm events).

* Click on the sampling stations (green dots) for freshwater sampling data

Sampling Methods:

Samplers visit each sample location once per month. At each location, the following samples are collected:

1) 1 liter grab sample for Total Suspended Sediment analysis
2) 2 liter grab sample for Particulate Carbon and Nitrogen analysis
3) 250 mL grab sample for Total Phosphorous analysis
4) 25-30mL of water filtered through a 0.45µm carbon cleaned glass fiber filter for Dissolved Organic Carbon and Total Dissolved Nitrogen analyses
5) 45-50 mL of water filtered through a 0.45µm cellulose membrane filter for Dissolved Nutrient analysis.

All samples are refrigerated/frozen immediately after collection and transferred to the University of Washington within 3-5 days.

Analysis Methods:

Once they have been transported to the University of Washington, samples are sent to various labs for analysis. Total Suspended Sediment and Total Phosphorous analyses are completed by Suzanne Osborne in the UW Civil & Environmental Engineering Limnology Lab. Dissolved Nutrient, Dissolved Organic Carbon, and Total Dissolved Nitrogen analyses are completed by Kathy Krogslund’s marine chemistry lab in the University’s Oceanography Department. The two liters of water collected for Particulate Carbon and Nitrogen Analyses are filtered through a 0.45µm carbon cleaned glass fiber filter using a magnetic filter tower. The resultant sediment-laden filters are air dried, acidified, air-dried again, packaged into tin capsules, and sent to the University of California at Davis’s Stable Isotope Facility for analysis.

Station Names