Deer Creek

Instream Spawning and Rearing Habitat

Data Source: FlowWest 2021

A flow to suitable area relationship was modeled using depth and velocity suitability ranges applied to HEC-RAS 2-dimensional hydraulic model output for the instream spawning habitat of Fall Run Chinook Salmon, Late-Fall Run Chinook Salmon and the instream rearing habitat of Fall Run Chinook Salmon, Late-Fall Run Chinook Salmon, Spring Run Chinook Salmon, and Steelhead, as well as fry habitat for Fall Run Chinook Salmon, Late-Fall Run Chinook Salmon, Spring Run Chinook Salmon, and Steelhead. Spring Run Chinook and Steelhead spawning habitat were calculated with a relationship between flow and mean weighted usable area from watersheds in the region with modeled habitat.

Suitable ranges for Deer Creek were defined using the following sources:

Fall Run & Late-Fall Run Spawning - Clear Creek Fall Run Suitability Criteria (Gard 2019)
All Species Juvenile Instream Rearing - Clear Creek Fall Run Suitability Criteria (Gard 2019)
All Species Juvenile Floodplain Rearing - CBEC 2019
Fall, Spring & Late-Fall Fry Rearing - Battle Creek Fall Run Suitability Criteria (Gard 2019)
Steelhead Fry Rearing - Battle Creek Steelhead Suitability Criteria (Gard 2019)

Data from Gard 2019 can be downloaded here.

The depth and velocity ranges for species and life-stage combinations are listed in the following table.

Species	Lifestage	Location	Suitable Depth Range (feet)	Suitable Velocity Range (feet)
Fall Run Chinook, Late-Fall Run Chinook	Adult Spawning	Instream	0.41 - 6.69	0.09 - 6.30
Fall Run Chinook, Late-Fall Run Chinook	Juvenile Rearing	Instream	0.41 - 5.31	0.00 - 3.07
Spring Run Chinook, Steelhead	Juvenile Rearing	Instream	0.21 - 5.59	0.00 - 5.54
Fall Run Chinook, Late-Fall Run Chinook, Spring Run Chinook, Steelhead	Juvenile Rearing	Floodplain	0.50 - 5.20	0.00 - 4.00
Fall Run Chinook, Late-Fall Run Chinook, Spring Run Chinook	Fry	Instream	0.05 - 3.45	0 - 1.82
Steelhead	Fry	Instream	0.09 - 4	0.09 - 3.6

Spawning Data

Header Descriptions: flow_cfs = flow in cubic feet per second, FR_spawn_sqm = Fall Run Chinook Spawning Area (square meters), LFR_spawn_sqm = Late-Fall Run Chinook Spawning Area (square meters), watershed = section of stream modeled for CVPIA SDM
flow_cfs	FR_spawn_sqm	LFR_spawn_sqm
100	65720.83	65720.83
250	82800.52	82800.52
300	86789.41	86789.41
400	92295.97	92295.97
500	95754.20	95754.20

… with 13 more rows

Rearing Data

Header Descriptions: flow_cfs = flow in cubic feet per second, FR_juv_sqm = Fall Run Chinook Juvenile Area (square meters), LFR_juv_sqm = Late-Fall Run Chinook Spawning Area (square meters), SR_juv_sqm = Spring Run Chinook Juvenile Area (square meters), ST_juv_sqm = Steelhead Juvenile Area (square meters), FR_fry_sqm = Fall Run Chinook Juvenile Area (square meters), LFR_fry_sqm = Late-Fall Run Chinook Spawning Area (square meters), SR_fry_sqm = Spring Run Chinook Juvenile Area (square meters), ST_fry_sqm = Steelhead Juvenile Area (square meters)
flow_cfs	FR_juv_sqm	LFR_juv_sqm	SR_juv_sqm	ST_juv_sqm	FR_fry_sqm	LFR_fry_sqm	SR_fry_sqm	ST_fry_sqm
100	286756.1	286756.1	418029.9	418029.9	236918.4	236918.4	306310.4	426783.4
250	322257.7	322257.7	527637.3	527637.3	171301.2	171301.2	221474.4	501108.5
300	329779.9	329779.9	561604.6	561604.6	167021.0	167021.0	215940.5	517413.7
400	329927.4	329927.4	613082.1	613082.1	159890.8	159890.8	206722.0	529421.8
500	323999.9	323999.9	653528.4	653528.4	160461.6	160461.6	207460.0	517640.5

… with 13 more rows

Spawning Habitat Area

The following plot shows the suitable spawning habitat in acres for Fall Run and Late-Fall Run Chinook.

Fry Rearing Habitat Area

The following plot shows the suitable fry habitat in acres for Fall Run Chinook, Late-Fall Run Chinook, Spring Run Chinook and Steelhead.

Juvenile Rearing Habitat Area

The following plot shows the suitable rearing habitat in acres for Fall Run Chinook, Late-Fall Run Chinook, Spring Run Chinook and Steelhead.

Floodplain Rearing Habitat

Data Source: Calcuated using a flow to area relationship modeled using HEC-RAS (FlowWest 2021)

Fall Run and Late-Fall Run

The entire mapped rearing extent of 12.2 miles was modeled using Lower Deer Creek Flood and Ecosystem Improvement Project HEC-RAS Hydrodynamic model. An active channel area of 58.7 acres, estimated through remote sensing analysis, was subtracted from total inundated area to obtain inundated floodplain area.

Spring Run and Steelhead

A 12.2 mile portion of the entire mapped rearing extent of 47.9 miles was modeled using Lower Deer Creek Flood and Ecosystem Improvement Project HEC-RAS Hydrodynamic model. Of the entire mapped rearing extent, 12.2 miles were classified as low gradient and 35.7 miles were classified as high gradient based on a geomorphic analysis of long profile slopes and valley widths. The floodplain area per unit length was determined for the modeled extent and used to approximate areas for the non-modeled extent. The area per unit length was scaled by a factor of 0.1 for the high gradient extent. There was no scaling factor applied to the low gradient extent.

Floodplain Data

The areas represent total suitable rearing area in acres.

Header Descriptions: flow_cfs = flow in cubic feet per second, FR_floodplain_acres = Fall Run Chinook floodplain acres, SR_floodplain_acres = Spring Run Chinook floodplain acres, ST_floodplain_acres = Steelhead floodplain acres, watershed = section of stream modeled for CVPIA SDM
flow_cfs	FR_floodplain_acres	LFR_floodplain_acres	SR_floodplain_acres	ST_floodplain_acres	watershed
900	0.000000	0.000000	0.000000	0.000000	Deer Creek
1000	5.960422	5.960422	7.706198	7.706198	Deer Creek
3000	85.216162	85.216162	110.175510	110.175510	Deer Creek
5000	146.270983	146.270983	189.112954	189.112954	Deer Creek
6000	167.836639	167.836639	216.995074	216.995074	Deer Creek

… with 8 more rows