1. Longitudinal Patterns of Fine Sediment Infiltration and Implications for Chinook Egg-to-Fry survival Ryan Klett1, Christian Torgersen2, Jeremy Cram1, Andrew Dittman3, George Pess3, Phil Roni3 1 College of Forest Resources, University of Washington, Seattle, WA 98195 2 U.S. Geological Survey, Forest and Rangeland Ecosystem Science Center, Cascadia Field Station 3 NOAA Northwest Fisheries Science Center, 2725 Montlake Boulevard East, Seattle, WA 98112

2. Fine Sediment and Egg to Fry survival Levasseur et al. 2006

3. Objectives 1.Dominant scale of spatial variation 2.Correlation between fine sediment infiltration, physical/geomorphic features 3.Associations between fine sediment infiltration and Chinook spawning patterns.

4. N Easton Thorp Cle Elum Cle Elum R. Teanaway R. Yakima R. Study Area 3 reaches,14 sites per reach with 3 redds 4 paired sites with 6 redds 46 sites, 132 redds

5. The Whitlock-Vibert Box Simple, cheap, reliable index of sediment infiltration Filled with pre-sorted gravels in equal proportions: 6-12 mm, 12-24, and 24- 36mm. Used by WDFW for concurrent survival study

6. Timing of Deployment and Retrieval

7. Deployment

8. Retrieval

9. Analysis of Sediment Samples Wet sieve, dry, dry sieve,weigh Reported as mass of fines <2mm/mass of gravel and fines in WV box

10. Within-Site Variability in Fine Sediment D 50 Velocity Spacing

11. Within-Site Variability in Fine Sediment 0.35 m/s 0.72 m/s 0.91 m/s 101 spacing=2 and 5 m

12. Paired Set, Within Habitat Unit

14. two sample t-test P=0.07 5m from left bank 15m from left bank

15. Multiple Habitat Units <100 m apart

17. 1118 1119 1120

18. Reach Scale

21. Intrusion across Mulitple Reaches

22. Site selection and fine sediment

23. Implications Threshold typically established at 15-20% No sites exceeding 12%

24. Thanks Committee: chair- Christian Torgersen (USGS, UW) Tom Quinn (UW). Phil Roni, (NWFSC,NOAA) Chris Johnson, (WDFW) George Pess, Andy Dittman (NWFSC, NOAA) Jeremy Cram, Katie Murray, Thomas Buehrens (UW) Charles Strom and the Cle Elum Supplementation and Research Facility staff