2. Mallard Island and the Largest Flood Event Since 1997 Nicole David Lester McKee San Francisco Estuary Institute

3. Sacramento River Flood Control System Shasta Dam Hillcrest Freeport

4. Yolo Bypass Schematic

5. Sampling Events December 25-28, 2005 First Flush sampled at Mallard Island, 9 samples + 1 duplicate January 2-18, 2006 Contingency Budget used for 14 samples + 1 duplicate for flood event

6. Data from 12/30/2005 through 01/18/2006 · Duration: 19 days Sacramento River at Freeport 88,000 cfs

8. Data from 12/30/2005 through 01/18/2006 · Duration: 19 days Yolo Bypass near Woodland 260,000cfs

9. Yolo Bypass

10. Cache Creek

12. Sacramento River

13. Delta Outflow from 12/25/05 to 01/25/06 370,000 cfs

14. Cross Section Survey Tuesday, January 10, 2006 Morning Afternoon

15. USGS performed 8 cross-sectional surveys of velocity and turbidity Results similar to previous surveys, establishing MI gauge house as representative sampling site Cross Section Surveys

16. Return Frequency

17. Storm Event Comparison

18. Yolo Bypass March 1-12, 2006

20. Relationship between total Hg and SSC influenced by salinity

21. Salinity Measurements in Dec 05 and Jan 06

22. Seth Shonkoff, SFEI Max Delaney, SFEI Jay Davis, SFEI

23. Richard Looker, Regional Board Jennifer Hunt, SFEI

24. Thank You!