High Flow Studies (WY 2005)

Lester McKee

Sources Pathways and Loadings Workgroup

Sacramento River at Mallard Island(River Loadings – RMP Funding)

Chipps Island

Pittsburg Marina

Sacramento RiverSampling Location

Sampling(10 samples collected over 4 days)

0

10000

20000

30000

40000

50000

60000

70000

1-Dec-04 21-Dec-04 10-Jan-05 30-Jan-05 19-Feb-05 11-Mar-05 31-Mar-05

Date

Dis

char

ge (

cfs)

Discharge (CFS)

Sample2 samples3 samples

Parameters and Preliminary Results Do not cite or quote

• Total Hg• PCBs• PAHs• PBDEs• Total Se: 0.443 – 0.661 µg/L• SSC• DOC• POC

Guadalupe River at San Jose(Small Tributaries Loading)

Funding

• USACE ($100 k)• RMP ($50 k)• SCVURPPP ($23 k)

Sampling~40 samples so far (6 for Bed Load Hg)

0

1000

2000

3000

4000

5000

10/1/04 11/1/04 12/2/04 1/2/05 2/2/05 3/5/05

Date

Dis

char

ge

(cfs

)

0

100

200

300

400

500

600

700

Tu

rbid

ity

(FN

U)

Flow

Water Sample

Bed Load Sample

Turbidity

Parameters and Preliminary ResultsDo not cite or quote

• Total Hg 73 – 1,496 ng/L • Dissolved Hg 4.2 – 5.4 ng/L (0-6% of total Hg)• Total MeHg 0.09 – 1.89 ng/L• Dissolved MeHg 0.05 – 0.11 ng/L• Particulate MeHg 1.6 – 9.9 ng/g (est)• PCBs• PBDEs• SSC• DOC• POC

Coyote Creek at Highway 237Funding RB2 – Lab only $13 k)

Sampling(n = 7)

0100

200300400

500600700

800900

1-Nov 21-Nov 11-Dec 31-Dec 20-Jan 9-Feb

Date

Dis

ch

arg

e (

cfs

)

Discharge (cfs)

Sample

Parameters

• Total Hg

• PCBs

• PBDEs

• SSC

• DOC

• POC