HOOD RIVER TRIBUTARIES DRAFT AREA WEIGHTED SUITABILITY Presented by: Thomas Gast, Normandeau Associates Presented to: Hood River Water Planning Group Instream.

HOOD RIVER TRIBUTARIES

DRAFT AREA WEIGHTED SUITABILITY

Presented by:Thomas Gast, Normandeau Associates

Presented to:Hood River Water Planning Group Instream Flow Subcommittee

June17, 2013

AREA WEIGHTED SUITABILITY

•AWS = WUA – weighted useable area•An index of suitable physical habitat availability•NOT an actual area• Presented as a relationship to flow•Calculated from each sample point (station) along study transects

What is it?

AREA WEIGHTED SUITABILITY

• The index of suitability of each station component is multiplied together and weighted by the area it represents– Habitat Suitability Criteria (HSC) applied

to:

How is it calculated?

Depth

Velocity

Attribute • Cover• Substrate

AREA WEIGHTED SUITABILITY

•AWS is determined from:– Depth suitability– Velocity suitability– Attribute (substrate/cover) suitability

•Weighted by stream area represented

What does it mean?

AWS does not include•Temperature•Dissolved Oxygen•Suspended Sediment•Or anything else (flow availability!)

AREA WEIGHTED SUITABILITY

•Use a historic flow time series record•Compare alternatives

– How does each alternative alter habitat availability for each species/life-stage?

• Limit frequency and extent of low values•Balance competing life-stages and use of water•Consider management strategies

How do you use it?

HABITAT TIME SERIES ANALYSIS

1. A time period is selected which corresponds to a species’ life stage of interest. The time period here is July-December for Spawning Chinook Salmon. For this example, day 123 (October 31) is selected for the example.

2. The flow corresponding to day 123 is 246 cfs on this hydrograph.

3. The habitat index that corresponds to 246 cfs is found on the Chinook Salmon Spawing AWS curve at ~ 25000.

HABITAT

INDEX

HABITAT TIME SERIES ANALYSIS

4. The Habitat Index of 25000 corresponding to day 123 is plotted to develop a Habitat Index Time Series.

5. To complete the Habitat Index Time Series, all the remaining days and corresponding habitat index are plotted.

HABITAT TIME SERIES ANALYSIS

In the previous example, one streamflow time series was considered and in the Water Planning Study, a different streamflow time series will be generated for each of the 32 alternatives at each IFIM reach.To evaluate the Habitat Suitability for each of these alternatives the following steps will be completed:

1. The Habitat Time Series will be rearranged by probability of exceedance, similarly to a Flow Duration Curve, where Habitat Index values replace flow.

2. The “Habitat Duration Curve” will then be generated for each of the 32 alternatives.

3. The alternative with highest cumulative habitat index is more favorable to the species during the period selected.  

EAST FORK HOOD RIVERLower Site

0

2000

4000

6000

8000

10000

12000

14000

16000

18000

0 100 200 300 400 500 600 700

AWS

ft2

/1000ft

Flow cfs

Cutthroat

Spawning

Juvenile Rearing

Adult Rearing

EAST FORK HOOD RIVERLower Site

0

2000

4000

6000

8000

10000

12000

14000

16000

18000

0 100 200 300 400 500 600 700

AWS

ft2

/1000ft

Flow cfs

Chinook

Spawning

Fry Rearing

Juvenile Rearing

Adult Holding

EAST FORK HOOD RIVERLower Site

0

2000

4000

6000

8000

10000

12000

14000

16000

18000

0 100 200 300 400 500 600 700

AWS

ft2

/1000ft

Flow cfs

Coho

Fry Rearing

Juvenile Rearing

Adult Holdring

Spawning

EAST FORK HOOD RIVERLower Site

0

2000

4000

6000

8000

10000

12000

14000

16000

18000

0 100 200 300 400 500 600 700

AWS

ft2

/1000ft

Flow cfs

Steelhead

Spawning

Fry Rearing

Juvenile Rearing

Adult Holding

EAST FORK HOOD RIVERUpper Site

0

2000

4000

6000

8000

10000

12000

14000

0 100 200 300 400 500 600 700 800 900 1000

AWS

ft2

/1000ft

Flow cfs

Cutthroat

Spawning

Juvenile Rearing

Adult Rearing

EAST FORK HOOD RIVERUpper Site

0

2000

4000

6000

8000

10000

12000

14000

0 100 200 300 400 500 600 700 800 900 1000

AWS

ft2

/1000ft

Flow cfs

Chinook

Spawning

Fry Rearing

Juvenile Rearing

Adult Holding

EAST FORK HOOD RIVERUpper Site

0

2000

4000

6000

8000

10000

12000

14000

0 100 200 300 400 500 600 700 800 900 1000

AWS

ft2

/1000ft

Flow cfs

Coho

Fry Rearing

Juvenile Rearing

Adult Holding

Spawning

EAST FORK HOOD RIVERUpper Site

0

2000

4000

6000

8000

10000

12000

14000

0 100 200 300 400 500 600 700 800 900 1000

AWS

ft2

/1000ft

Flow cfs

Steelhead

Spawning

Fry Rearing

Juvenile Rearing

Adult Holding

WEST FORK HOOD RIVER

0

2000

4000

6000

8000

10000

12000

14000

16000

18000

20000

0 200 400 600 800 1000 1200

AWS

ft2

/1000ft

Flow cfs

Bull Trout

Spawning

Juvenile Rearing

Adult Rearing

WEST FORK HOOD RIVER

0

2000

4000

6000

8000

10000

12000

14000

16000

18000

20000

0 200 400 600 800 1000 1200

AWS

ft2

/1000ft

Flow cfs

Cutthroat

Spawning

Juvenile Rearing

Adult Rearing

WEST FORK HOOD RIVER

0

2000

4000

6000

8000

10000

12000

14000

16000

18000

20000

0 200 400 600 800 1000 1200

AWS

ft2

/1000ft

Flow cfs

Chinook

Spawning

Fry Rearing

Juvenile Rearing

Adult Holding

WEST FORK HOOD RIVER

0

2000

4000

6000

8000

10000

12000

14000

16000

18000

20000

0 200 400 600 800 1000 1200

AWS

ft2

/1000ft

Flow cfs

Coho

Fry Rearing

Juvenile Rearing

Adult Holding

Spawning

WEST FORK HOOD RIVER

0

2000

4000

6000

8000

10000

12000

14000

16000

18000

20000

0 200 400 600 800 1000 1200

AWS

ft2

/1000ft

Flow cfs

Steelhead

Spawning

Fry Rearing

Juvenile Rearing

Adult Holding

GREEN POINT CREEK

0

2000

4000

6000

8000

10000

12000

0 100 200 300 400 500 600

AWS

ft2

/1000ft

Flow cfs

Cutthroat

Spawning

Juvenile Rearing

Adult Rearing

GREEN POINT CREEK

0

2000

4000

6000

8000

10000

12000

0 100 200 300 400 500 600

AWS

ft2

/1000ft

Flow cfs

Chinook

Spawning

Fry Rearing

Juvenile Rearing

Adult Holding

GREEN POINT CREEK

0

2000

4000

6000

8000

10000

12000

0 100 200 300 400 500 600

AWS

ft2

/1000ft

Flow cfs

Coho

Fry Rearing

Juvenile Rearing

Adult Holding

Spawning

GREEN POINT CREEK

0

2000

4000

6000

8000

10000

12000

0 100 200 300 400 500 600

AWS

ft2

/1000ft

Flow cfs

Steelhead

Spawning

Fry Rearing

Juvenile Rearing

Adult Holding

NEAL CREEK

0

1000

2000

3000

4000

5000

6000

7000

8000

9000

10000

0 10 20 30 40 50 60 70 80

AWS

ft2

/1000ft

Flow cfs

Cutthroat

Spawning

Juvenile Rearing

Adult Rearing

NEAL CREEK

0

1000

2000

3000

4000

5000

6000

7000

8000

9000

10000

0 10 20 30 40 50 60 70 80

AWS

ft2

/1000ft

Flow cfs

Coho

Fry Rearing

Juvenile Rearing

Adult Holding

Spawning

NEAL CREEK

0

1000

2000

3000

4000

5000

6000

7000

8000

9000

10000

0 10 20 30 40 50 60 70 80

AWS

ft2

/1000ft

Flow cfs

Steelhead

Spawning

Fry Rearing

Juvenile Rearing

Adult Holding