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Small Tributary Loads

The “Guadalupe River Study” Lester McKee, John Oram, Jon Leatherbarrow SFEI Autumn Bonnoma, Mark Stephenson, Wes Heim MLML. Item #8. Small Tributary Loads. Item #8. Sampling Location. Item #8. Sampling. Item #8. Suspended Sediment Loads. Item #8. HgT v SSC (all data). Item #8.

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Small Tributary Loads

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  1. The “Guadalupe River Study” Lester McKee, John Oram, Jon Leatherbarrow SFEI Autumn Bonnoma, Mark Stephenson, Wes Heim MLML Item #8 Small Tributary Loads

  2. Item #8 Sampling Location

  3. Item #8 Sampling

  4. Item #8 Suspended Sediment Loads

  5. Item #8 HgT v SSC (all data)

  6. Item #8 Sources of Mercury HgT mg/kg (ppm)

  7. Item #8 Total Mercury Loads 133% MAQ 111% MAQ 96% MAQ

  8. Item #8 Methylmercury Concentrations

  9. Item #8 Methyl Mercury Loads • 40 g or 0.5% of total Hg load

  10. Item #8 Bedload Mercury Concentrations

  11. Item #8 Bedload Mercury Loads • 1% of total Hg load

  12. Item #8 WY05 Organic Contaminants Concentrations tPBDEs = 2 to 3 x tPCBs

  13. Item #8 Organic Contaminants Loads

  14. Item #8 Discharge SSC 10,805 tons 53.1 Mm3 WY 2003 45.3 Mm3 8,578 tons WY 2004 58.0 Mm3 4,575 tons WY 2005

  15. Item #8 tPCBs vs. SSC WY 2005 samples showed increased separation between rising and falling stages

  16. Item #8 Rising and Falling Stages tPCBs tPBDEs

  17. Item #8 Project Schedule • WY 2005 • Report completed read for review • WY 2006 funded by USACE/SCVWD / RMP • Complete QAQC for all WYs and get the data on the WWW • Write papers for Journal • WY 2007 funded? • Only WY 2006 currently guaranteed but everything in place for continuation • RMP funding not yet discussed • Future Modeling (if funding is found)? • Explore transport processes in more detail • Explore and predict the effects of management on Hg loads

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