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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 - PowerPoint PPT Presentation
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HOOD RIVER TRIBUTARIESDRAFT 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 ANALYSISIn 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
ft
2
/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
ft
2
/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
ft
2
/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
ft
2
/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
ft
2
/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
ft
2
/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
ft
2
/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
ft
2
/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
ft
2
/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
ft
2
/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
ft
2
/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
ft
2
/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
ft
2
/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
ft
2
/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
ft
2
/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
ft
2
/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
ft
2
/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
ft
2
/1000ft
Flow cfs
Steelhead
Spawning
Fry Rearing
Juvenile Rearing
Adult Holding