Hatchery Subyearling Survival Lower Granite to McNary Dam 1998 to 2007 (preliminary results) Fish Passage Center Fish Passage Center
Feb 01, 2016
Hatchery Subyearling Survival Lower Granite to McNary Dam
1998 to 2007(preliminary results)
Fish Passage CenterFish Passage Center
Overview
PIT-tagged Hatchery Subyearling Chinook PIT-tagged Hatchery Subyearling Chinook passing LGR dam during two-week blocks from passing LGR dam during two-week blocks from May 20 to July 15 each yearMay 20 to July 15 each year
Estimate Survival and Travel Time for blocksEstimate Survival and Travel Time for blocks Assign average environmental variables during Assign average environmental variables during
passage such as Flow, Spill, Temperature and passage such as Flow, Spill, Temperature and Water Transit TimeWater Transit Time
Show bivariate plots of Reach Survival and Show bivariate plots of Reach Survival and environmental variables.environmental variables.
Lower Granite to McNary Dam Reach
Timing of Subyearling fall Chinook at LGR Dam in 2006 compared to Historic Timing
5/3 5/31 6/28 7/26 8/23 9/20 10/18
Hist Av 95 to 99 Hist 00 to 05 Run-At-Large 2006
CJRAP HCD PLAP
NPTH BCCAP SNAK 15W
CLWR 13W
Survival for Hatchery Subyearling Chinook LGR to McN 1998 to 2006 with 95% CI’s
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1998 1999 2000 2001 2002 2003 2004 2005 2006 2007
Su
rviv
al
LG
R t
o M
cN
(9
5%
CI)
5/20-6/2 6/3-6/16 6/17-6/30 7/01-7/14
Comparison of Environmental conditions at LGS 1998 to 2007
0
20
40
60
80
100
120
5/1 5/8 5/15 5/22 5/29 6/5 6/12 6/19 6/26 7/3 7/10 7/17 7/24 7/31
Sp
ill (
Kc
fs)
1998 1999 2000 2001 2002 2003 2004 2005 2006 2007
0
50
100
150
200
250
5/1 5/8 5/15 5/22 5/29 6/5 6/12 6/19 6/26 7/3 7/10 7/17 7/24 7/31
Dis
ch
arg
e (
Kcfs
)
1998 1999 2000 2001 2002 2003 2004 20052006 2007
10
12
14
16
18
20
22
5/1 5/8 5/15 5/22 5/29 6/5 6/12 6/19 6/26 7/3 7/10 7/17 7/24 7/31
AvT
emp
(C
)
1998 1999 2000 2001 2002 2003 2004 2005 2006 2007
Flows in 2007 were low from late May through the end of July; similar to 2001
Spill proportion was high in 2007 but volumes were low
Temperatures were warm in 2007 similar to 2005 and 2006
Hatchery Subyearling Chinook Survival vs Avg Spill Pct LGS, LMN, IHR, McN
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5
Avg Spill (Percent) LGS, LMN, IHR, MCN
Su
rviv
al
LG
R t
o M
CN
Weighted Regression AH 2007
y=0.36151 + 0.84195x
adj R2 = 0.57, p = 0.0000
Water Transit Time
WTT--Avg Time WTT--Avg Time for Water Particle to for Water Particle to Transit ReservoirTransit Reservoir
Q -- discharge at Q -- discharge at damdam
Converting Flows to Water Transit Time
0
5
10
15
20
25
30
35
0 20 40 60 80 100 120 140 160
Avg Flow LGS, LMN, IHR (kcfs)
Wat
er T
ran
sit
Tim
e (d
ays)
Hatchery Subyearling Chinook Survival vs sum WTT LGS, LMN, IHR, McN
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
0 5 10 15 20 25 30 35
Avg WTT (d) LGR to MCN
Su
rviv
al
LG
R t
o M
CN
Weighted Regression AH 2007
y=0.83019 - -0.01665X
adj R2 = 0.73, p= 0.00000
Hatchery Subyearling Chinook Survival vs Avg Temp LGS, LMN, IHR, McN
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
12 14 16 18 20 22 24
Avg Temp (degrees C) LGS, LMN, IHR, MCN
Su
rviv
al
LG
R t
o M
CN
Weighted Regression AH 2007
y=1.21923 -0.03805X
adj R2 = 0.46, p=0.00009
0.0
0.10.2
0.30.4
0.5
AVGSPILPROP
0
10
20
30
40
WTT
0.3
0.4
0.5
0.6
0.7
0.8S
UR
VIV
AL
High Spill Proportion,fast WTT and High Survival
No Spill, slow WTTand Low Survival
Hatchery Subyearling Chinook Survival vs WTT and Spill Proportion
Conclusions
For actively migrating subyearling For actively migrating subyearling Chinook, increased spill and decreased Chinook, increased spill and decreased water transit time (higher flows) appear to water transit time (higher flows) appear to improve survival, while higher temperatures improve survival, while higher temperatures decrease survivaldecrease survival