Future Data Improvements

Update with new VA data.

Instream Spawning and Rearing Habitat

Data Source: Spawning FWS 2010 (pgs 59-61) and Rearing FWS 2010 (pgs 74-76)

The instream spawning and rearing habitat for Fall Run Chinook Salmon, Spring Run Chinook Salmon, and Steelhead in the Yuba River are based on data from the Fish and Wildlife Service (FWS) flow-habitat relationship final reports. A 2-dimensional hydraulic and habitat model called River2D was used to model available spawning and rearing habitat. The FWS instream spawning and rearing data were provided by Mark Gard from the California Department of Fish and Wildlife in a spreadsheet. Mark Gard instructed us to use cells A4:H33 and A39:H68 of the ‘Yuba’ tab within the spreadsheet, representing the Englebright to Daguerre Segment (12.7 miles) and the Daguerre to Feather Segment (11.4 miles), respectively. For adult Steelhead, Mark Gard instructed us to use cells A73:B100 of the ‘Yuba’ tab within the spreadsheet.

Spawning and Rearing Data

The instream spawning and rearing habitat data described above for Fall Run Chinook Salmon (FR), Spring Run Chinook Salmon (SR), and Steelhead (ST) are combined for use in the Decision Support Model (DSM) in the following format. Units are in square feet per 1000 feet.

Header Descriptions: flow_cfs = flow in cubic feet per second, FR_spawn_wua = Fall Run Chinook Spawning WUA, FR_fry_wua = Fall Run Chinook Fry WUA, FR_juv_wua = Fall Run Chinook Juvenile WUA, SR_spawn_wua = Spring Run Chinook Spawning WUA, ST_spawn_wua = Steelhead Spawning WUA, ST_fry_wua = Steelhead Fry WUA, ST_juv_wua = Steelhead Juvenile WUA, ST_adult_wua = Steelhead Adult WUA, watershed = section of stream modeled for CVPIA SDM
flow_cfs FR_spawn_wua FR_fry_wua FR_juv_wua SR_spawn_wua ST_spawn_wua ST_fry_wua ST_juv_wua ST_adult_wua watershed
150 3086.752 1901.940 42.92405 1211.406 63.60021 2472.573 1115.130 NA Yuba River
250 3878.843 1746.204 61.60411 1892.588 162.49371 2718.746 1414.411 NA Yuba River
300 4089.738 1778.598 71.34100 2129.055 223.07620 2846.064 1551.380 75292.67 Yuba River
350 4258.142 1747.218 80.22130 2315.054 286.41708 2880.195 1667.232 77960.78 Yuba River
400 10191.296 4080.976 1050.13045 5399.731 1079.34899 7674.502 3820.689 79850.13 Yuba River

… with 29 more rows

Spawning WUA

The following plot shows the weighted usable spawning area (WUA) in square feet per thousand feet for Fall Run Chinook Salmon, Spring Run Chinook Salmon, and Steelhead. These area per length rates are multiplied by the total spawning reach length mapped by the Science Integration Team (SIT) to estimate available habitat.

Rearing WUA

The following plot shows the rearing WUA in square feet per thousand feet for Fall Run Chinook Salmon and Steelhead fry and juvenile. These rates are multiplied by the total rearing reach length mapped by the SIT to estimate available habitat.

Floodplain Rearing Habitat

Data Source: SRH-2D hydraulic model developed by Dr. Greg Pasternack at the University of California, Davis

The entire mapped rearing extent of 23.1 miles was modeled using SRH-2D hydraulic model developed by Dr. Greg Pasternack at the University of California, Davis. An active channel area of 446.2 acres, estimated through remote sensing analysis, was subtracted from total inundated area to obtain inundated floodplain area.

Floodplain Data

The areas represent total inundated 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 SR_floodplain_acres ST_floodplain_acres watershed
800 0.00 0.00 0.00 Yuba River
880 0.99 0.99 0.99 Yuba River
930 1.61 1.61 1.61 Yuba River
1000 2.44 2.44 2.44 Yuba River
1300 5.62 5.62 5.62 Yuba River

… with 15 more rows

Floodplain Plot