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River Loads

Explore the influence of salinity, suspended sediments, Hg loads, and organic contaminants at River Loads Sampling Location. Preliminary TPCB concentrations data from May 2003 provided. Overview of project schedule for 2005-2009.

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River Loads

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  1. The “Mallard Island Study” Nicole David, John Oram, Lester McKee, SFEI Russ Flegal, UCSC River Loads

  2. Sampling Location

  3. Sampling

  4. Hg v SSC (all data)

  5. Influence of Salinity

  6. Suspended Sediment and Hg Loads

  7. Organic Contaminants *four samples collected in May 2003 had TPCB concentrations ranging from 890 – 6700 pg/L

  8. Preliminary Loading EstimatesLoads are preliminary and were estimated using Regression (REG) and Flow Weighted Mean Concentrations (FWMC). Preliminary estimates of errors are approximately ± 25%.

  9. Project Schedule • Summer/Fall 2005: $51k - Write “Final report” for data collected during WYs 2002, 2003, 2004, and 2005 • WY 2006: $60k - Collect wet season “first flush data and update report • WY 2007: $0k - Use RMP contingency funds if necessary to sample a large flood • WY 2008: $0k - Use RMP contingency funds if necessary to sample a large flood • WY 2009: $120k – Sample and report on all floods for the season in addition to reinterpreting the first 8 years of chemical data and 15 years of suspended sediment data

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