ryan klett1, christian torgersen2, jeremy cram1, andrew dittman3, george pess3, phil roni3
DESCRIPTION
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 - PowerPoint PPT PresentationTRANSCRIPT
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 981952 U.S. Geological Survey, Forest and Rangeland Ecosystem Science Center, Cascadia Field Station3 NOAA Northwest Fisheries Science Center, 2725 Montlake Boulevard East, Seattle, WA 98112
Fine Sediment and Egg to Fry survival
Levasseur et al. 2006
Objectives1. Dominant scale of spatial variation
2. Correlation between fine sediment infiltration, physical/geomorphic features
3. Associations between fine sediment infiltration and Chinook spawning patterns.
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
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
Timing of Deployment and Retrieval
Deployment
Retrieval
Analysis of Sediment Samples
• Wet sieve, dry, dry sieve,weigh
• Reported as mass of fines <2mm/mass of gravel and fines in WV box
Within-Site Variability in Fine Sediment
D50
VelocitySpacing
Within-Site Variability in Fine Sediment
0.35 m/s
0.72 m/s
0.91 m/s
101 spacing=2 and 5 m
Paired Set, Within Habitat Unit
Paired Set, Within Habitat Unit
Paired Set, Within Habitat Unit
two sample t-test P=0.07
5m from left bank
15m from left bank
Multiple Habitat Units <100 m apart
Multiple Habitat Units <100 m apart
Multiple Habitat Units <100 m apart
1118
1119
1120
Reach Scale
Reach Scale
Reach Scale
Intrusion across Mulitple Reaches
Site selection and fine sediment
Implications• Threshold typically established at 15-20%• No sites exceeding 12%
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