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

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Presentation transcript:

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

Sampling Location

Sampling

Hg v SSC (all data)

Influence of Salinity

Suspended Sediment and Hg Loads

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

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

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