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Ecological objective. Mitigate effects of human induced alterations. Identify alteration sources. Describe unaltered system. Deficits = impact. Mitigation measures. Define unaltered state. Habitat reference. Target fish community. Species/life-stage habitat needs. - PowerPoint PPT Presentation
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Ecological objective
Mitigate effects of human induced alterations
Identify alteration sources
Describe unaltered system
Deficits = impact
Mitigation measures
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.45
Janu
ary
Febru
ary
Mar
chApr
ilM
ayJu
ne July
Augus
t
Septe
mbe
r
Octobe
r
Novem
ber
Decem
ber
Month
Ave
rag
e fl
ow
(m
3s-1
)
current soil depth15 cm deeper soil
Summer base flow
Define unaltered stateHabitat reference
Target fish community
Spatial habitat distribution
Habitat time series analysisCUT curves, RVA
Species/life-stage habitat needs
Unaltered flow
Fallfish
White sucker
Commonshiner
Longnose dace
E blacknose dace
Tessellated darter
Yellow perch
Pumpkinseed
American eel
Target Community
Other
Bain & Meixler 2000
FALLFISHPresence (76% ) Beta
BOULDER 1.95SHADING -1.07DEPTH 0-25 cm -1.76VELOCITY 45-60 cm/s 1.06RUN -0.57
High abundance (60% )Overhanging vegetation -0.97
WHITE SUCKERPresence (95% ) Beta
DEPTH 75-100 cm 5.01DEPTH 50-75 cm 2.19MESOLITHAL (small cobble) 1.62UNDERCUT BANK 1.66
High abundance (66% )Depth 75-100 7.62
LONGNOSE DACEPresence (92% ) Beta
RIFFLE 2.05FAST RUN 2.45XYLAL (wood) 4.60RIPRAP 2.29
High abundance (73% )VELOCITY 45-60 cm/s 3.35
BLACKNOSE DACEPresence (94% ) Beta
DEPTH 0-25cm 3.03BOULDER 2.57SHADING -1.44SHALLOW MARGIN 1.65PELAL (mud) 3.09VELOCITY 45-60 cm/s 1.46Submerged vegetation -1.44
High abundance (79% )MICROLITHAL (small gravel) -4.20
COMMON SHINERPresence (80% ) Beta
BOULDER 1.71RIPRAP 1.40SHADING -1.48DEPTH 50-75 cm -1.23
High abundance (69% )BOULDER 1.68SHADING -1.01
Survey 6
Site5.shp
backwater
cascade
fast run
glide
pool
pool plunge
rapid
riff le
run
side arm
Habitats at 5 cfsm
Velocity distribution in HMU’s
Glide
0.0000
0.1000
0.2000
0.3000
0.4000
0.5000
0.6000
0.7000
0.8000
0.9000
1.0000
CV
<15
CV
15 t
o<30
CV
30to
<45
CV
45to
<60
CV
60to
<75
CV
75to
<90
CV
90to
<10
5
CV
>10
5
0.3csfm
0.6csfm
1.4csfm
Backwater
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
CV
<15
CV
15 t
o<30
CV
30to
<45
CV
45to
<60
CV
60to
<75
CV
75to
<90
CV
90to
<10
5
CV
>10
5
0.3csfm
0.6csfm
1.4csfm
Rapid
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
CV
<15
CV
15 t
o<30
CV
30to
<45
CV
45to
<60
CV
60to
<75
CV
75to
<90
CV
90to
<10
5
CV
>10
5
0.3csfm
0.6csfm
1.4csfm
Run
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
CV
<15
CV
15 t
o<30
CV
30to
<45
CV
45to
<60
CV
60to
<75
CV
75to
<90
CV
90to
<10
5
CV
>10
5
0.3csfm
0.6csfm
1.4csfm
Rapid
GlideBackwater
Run
pool
riffle
rapid
FALLFISHPresence ( 76% ) Beta
BOULDER 1.95SHADING -1.07DEPTH 0-25 cm -1.76VELOCITY 45-60 cm/s 1.06
RUN -0.57High abundance ( 60% )
Overhanging vegetation -0.97
pool
riffle
rapid
FALLFISHPresence ( 76% ) Beta
BOULDER 1.95SHADING -1.07DEPTH 0-25 cm -1.76VELOCITY 45-60 cm/s 1.06
RUN -0.57High abundance ( 60% )
Overhanging vegetation -0.97
Cwsa
21%
28%
23%21%
0%
5%
10%
15%
20%
25%
30%
35%
40%
45%
50%
0 0.5 1 1.5 2 2.5
Flow yield (cfsm)
Rel
ativ
e h
abit
at a
rea
1948 - 1994
0
80
160
240
320
400
480
560
640
720
800
1/1
1/16
1/31
2/15 3/1
3/16
3/31
4/15
4/30
5/15
5/30
6/14
6/29
7/14
7/29
8/13
8/28
9/12
9/27
10/1
2
10/2
7
11/1
1
11/2
6
12/1
1
12/2
6
Day of the Year
Med
ian
dai
ly f
low
[cf
s]
simulation measured
Spawning (resident +
anadromous) and
Alt.S Rearing
Storage and Atl.S Emerg.
Winter Survival
Rearing & Growth
Growth and Alt.S Spawning
Hydrological criteria setting CUT-curves
Rearing and Growth
0
5
10
15
20
25
30
35
0 10 20 30 40 50 60
Cumulative Duration (days)
Du
rati
on
Co
nti
nu
ou
s E
ven
t (d
ays)
0.30 cfsm
0.35 cfsm
0.40 cfsm
0.45 cfsm
1
2
30 60 90
5
15
2 4 6 8 10 Discharge (m3.s-1)
(m2/1
00
m)
(m3
.s-1
)
days
WU
A
10
20
30
40
10
20
60
10
20
20 40 60 80 100
20 40 60 80 100
(m2/1
00
m)
days
cumulative frequency
cumulative continuous durations (in % of the total studied duration)
conti
nuous
dura
tions (d
ays)
(m2/1
00
m)
80%
50%
45%35%
WU
AW
UA
HABITAT TIME SERIES
HABITAT DURATION CURVES
CONTINUOUS UNDER THRESHOLD HABITAT DURATION CURVES
80%
50%
optim.
Dis
charg
e
30 90
0
20
40
60
80
100
120
140
160
180
Octo
ber
Novem
ber
Decem
ber
Janu
ary
Febru
ary
Mar
chApr
ilM
ayJu
ne July
Augus
t
Septe
mbe
r
Month
Lo
w f
low
hab
itat
(%
)
Target habitograph