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