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Hood Canal Update

Hood Canal Update. Water Quality Partnership March 17, 2005. Light (warmer, fresher) canal/river water. NEW. Dense (cold, salty) ocean water. Intermediate (warming, freshening) water. NEW. OLDEST. Dense (cold, salty) ocean water. MEDIUM. Circulation and Residence Time.

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Hood Canal Update

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  1. Hood Canal Update Water Quality Partnership March 17, 2005

  2. Light (warmer, fresher) canal/river water NEW Dense (cold, salty) ocean water Intermediate (warming, freshening) water NEW OLDEST Dense (cold, salty) ocean water MEDIUM Circulation and Residence Time

  3. Hood Canal Attributes • Strong stratification, distinct layers maintained with different characteristics. • deep waters with low oxygen don’t get mixed • Slow circulation, long residence time. • bulk of waters are “old” – no air contact • High productivity, high organic load. • respired away during decomposition

  4. Are we seeing long-term change? • Area of low oxygen may be spreading north and occupying greater volume. • Low oxygen present year-round. • Hypoxia developing earlier in year. • Biological effects may be worsening. • fish kill records, diver observations

  5. Estimated Range of Nitrogen Inputs to Hood Canal Preliminary Assessment and Corrective Action Plan, 2004

  6. Timing and Level of Nitrogen Inputs Very Low Low Moderate High Preliminary Assessment and Corrective Action Plan, 2004

  7. Corrective Actions • Implement SW programs, encourage LID practices. • Upgrade sewage systems. • Develop sewer plans. • Eliminate chum carcass disposal in marine waters. • Develop farm plans & provide funds to manage manure. • Implement Skokomish River and Union River TMDLs. • Breach dikes to improve Skokomish estuarine drainage. • Educate residents. • Encourage shellfish production.

  8. HOOD CANAL DISSOLVED OXYGEN PROGRAM

  9. HCDOP Coordinating Group LHCWIC – Bob Hager PSAT – Duane Fagergren Ecology– Dick Wallace UW – Jan Newton HCSEG – Neil Werner HCCC – Dave Christensen USGS – Gary Turney WDNR – David Roberts WDFW – Mary Lou Mills Skokomish Tribe – Keith Dublanica WDOH – Maryanne Guichard Kitsap County - Keith Grellner Mason County – Debbie Riley

  10. Corrective Action and Education Co-managers: PSAT and HCCC • Tasks • Research human-related Nitrogen • Publish findings in PACA • Fund corrective action projects • Enhance education and public involvement • Seek funds and adjust programs based on: • Results of early action projects • New scientific findings (IAM and USGS)

  11. Integrated Assessment & Modeling Co-managers: UW-APL and HCSEG • Tasks • Program administration • Marine water • Fresh surface/ground water • Biota • Modeling and analysis • Rapid response & diver program

  12. For more information visit www.psat.wa.gov or contact Anne Criss, acriss@psat.wa.gov, (360) 725-5439.

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