Small Tributary Loads

1
Small Tributary Loads
Item 8

• The Guadalupe River Study
• Lester McKee, John Oram, Jon Leatherbarrow SFEI
• Autumn Bonnoma, Mark Stephenson, Wes Heim
• MLML

2
Sampling Location
Item 8
3
Sampling
Item 8
4
Suspended Sediment Loads
Item 8
5
HgT v SSC (all data)
Item 8
6
Sources of Mercury
Item 8
HgT mg/kg (ppm)
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Total Mercury Loads
Item 8
133 MAQ
111 MAQ
96 MAQ
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Methylmercury Concentrations
Item 8
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Methyl Mercury Loads
Item 8

• 40 g or 0.5 of total Hg load

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Bedload Mercury Concentrations
Item 8
11
Bedload Mercury Loads
Item 8

• 1 of total Hg load

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WY05 Organic Contaminants Concentrations
Item 8
tPBDEs 2 to 3 x tPCBs
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Organic Contaminants Loads
Item 8
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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
tPCBs vs. SSC
Item 8
WY 2005 samples showed increased separation
between rising and falling stages
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Rising and Falling Stages
Item 8
tPCBs
tPBDEs
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Project Schedule
Item 8

• 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