Draft Outline for Bay Margins Conceptual Model

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Draft Outline for Bay Margins Conceptual Model

• Presented to the CFWG
• June 10, 2009

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Three Main Pieces

• Review of existing information
• Summary of present conceptual understanding
• Recommendation for next steps

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1. Review of existing information

• Local information
• Contaminated site cleanup
• Alameda NAS, Hunters Point, Moffet Field, San
  Leandro Bay, Richmond Field Station
• Watershed data
• Loads, soils, etc.
• Bay data
• Estimating margins relative to Bay proper
• Trends - can we say anything about degradation
  and attenuation?
• Comparison to other estuaries (short narrative)

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2. Summary of conceptual understanding

• Linking margins to impairment
• Mobilization from watersheds
• Delivery to nearshore areas (margins)
• Fate on margins
• Burial, degradation, uptake to foodweb
• Release from margins to open Bay
• Transfer from open ay to margins
• Forecasting recovery
• Why are sites wtill contaminated?
• Loading? Slow degradation? Slow flushing?
• Is monitored recovery a viable option?
• Degradation and attenuation
• What are the high leverage pathways?
• Where are contaminants entering the food web?

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3. Recommendations for next steps

• Desire for a general margin model
• What is it? How do we get there?
• Grid model development
• Link to watershed studies
• Link to Bay/Ocean modeling
• Suggested future studies
• Fieldwork to support models
• Fieldwork to support monitored recovery