Download - South Puget Sound Dissolved Oxygen Study
South Puget Sound Dissolved Oxygen Study
WQ Partnership MeetingMarch 15, 2007
Andrew Kolosseus360-407-7543
Goal of the Study
Determine how human activities (along with natural factors) affect low dissolved oxygen levels in South Puget Sound.
This study is part of Governor Gregoire’s long-term effort to protect Puget Sound
Primary Issues
• Fish need oxygen• Solve the problem before it gets
worse• Nitrogen is the main pollutant that
causes low dissolved oxygen levels
Long Term
If the study shows that something needs be done to protect dissolved oxygen levels in South Puget Sound, a plan of action that will result in clean water will be necessary.
Involvement
1. Webpage www.ecy.wa.gov/puget_sound then click on “South Puget Sound Dissolved Oxygen Study”
2. ListServ
3. Technical Advisory CommitteeNext meeting: March 19
Technical Advisory Committee
Tribes
WWTPs
University
Municipalities
Counties
Business Interests
Conservation District
Department of Health
Environmental Groups
Federal Government
1. Collect data to set up model
• Point source loads• Nonpoint source loads
– Rivers/streams– Groundwater– Septic systems– Fertilizer
• Atmospheric deposition
Input Data
Model Development
What-if Scenarios
Marine Data
• Ambient monitoring
• Monthly boundary sampling cruises
• Depth profiles
• Grab samples
• Productivity
• Currents (ADCP)
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South Sound Marine Stations
0 3 6 9 121.5Miles
South Sound Marine Stations
Atmospheric Deposition
• National Atmospheric Deposition Program
• Hood Canal??
• South Sound Phase 1 Total Nitrogen loads:– 3 kg/d– (1.2 tons/yr)
Nitrate (mg/l) Nitrate (kg/ha)Ammonium (mg/l)
Meteorology
• Wind
• Precipitation
• Cloud cover
• Air temperature
• Dewpoint temperature
• Solar radiation
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SHELTON
OLYMPIAPRIEST PT
PARKOLYMPIA
FOREST HQ
MCCHORDAFB
TACOMACITY HALL
VASHONISLAND
WAUNA 3 W
BREMERTON
OLYMPIA WSO AP
SEATACWSCMO AP
SEATTLE WSO CI
SEATTLE WB AP
KENT
GRAPEVIEW3 SW
Available rain data
Septic systems, land cover effects
• Included in river and stream monitoring
(89% of the watersheds tributary to South Sound)
2a. Develop model to represent complex physical structure
Input Data
Model Development
What-if Scenarios
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2b. Develop model to represent water quality processes
Input Data
Model Development
What-if Scenarios
3. Apply model to various what-if scenarios
Input Data
Model Development
What-if Scenarios
What if nitrogen
loads decrease?
Will South Sound DO levels…
… improve markedly?
… remain low?
Point vs. nonpoint
Deschutes/LOTT
Puyallup/Tacoma
Dissolved Inorganic Nitrogen
Watershed Inflows
Direct Point
Sources
South Puget Sound Phase 1
Expected Schedule
• Data collection
• Model development
• Potential follow-up activities
2006-07
2007-09
2010-