None planned.
Data Source: FWS 2003 (77-78) and FERC relicensing of DeSabla (APPENDIX E6.3.2.6-J1)
Instream spawning and rearing habitat in Butte Creek is based on data from the FWS instream 2003 study and the FERC relicensing of DeSabla 2008 study. Spawning habitat data are from the FWS study (p. 77-78). For Spring Run only, spawning data were generated using a RIVER2D 2-dimensional hydraulic and habitat model. The spawning data were compiled in a spreadsheet and scaled by reach length. The rearing data come from DeSabla 2008 in the lower butte section of the appendix (APPENDIX E6.3.2.6-J1). Instream rearing habitat data were provided in a spreadsheet. Mark Gard instructed us to use cells A71:C101 for the Fall Run Chinook rearing data. Units are in square feet per 1000 feet.
flow_cfs | SR_spawn_wua | watershed |
---|---|---|
20 | 656.4146 | Butte Creek |
25 | 662.8812 | Butte Creek |
30 | 669.0249 | Butte Creek |
35 | 680.7027 | Butte Creek |
40 | 685.0326 | Butte Creek |
… with 36 more rows
flow_cfs | ST_spawn_wua | watershed |
---|---|---|
60 | 3647 | Butte Creek |
70 | 4139 | Butte Creek |
80 | 4480 | Butte Creek |
90 | 4889 | Butte Creek |
100 | 5137 | Butte Creek |
… with 25 more rows
flow_cfs | SR_fry_wua | SR_juv_wua | ST_adult_wua | watershed |
---|---|---|---|---|
60 | 17549 | 18472 | 14399 | Butte Creek |
70 | 16339 | 19560 | 15950 | Butte Creek |
80 | 15208 | 20259 | 17296 | Butte Creek |
90 | 14391 | 20632 | 18265 | Butte Creek |
100 | 13426 | 20894 | 19367 | Butte Creek |
… with 25 more rows
The following plot shows the weighted usable spawning area (WUA) in square feet per thousand feet for Spring Run Chinook Salmon. These area per length rates are multiplied by the total spawning reach length mapped by the Science Integration Team (SIT) to estimate available habitat.
The following plot shows the rearing WUA in square feet per thousand feet for Spring Run Chinook Salmon fry and juvenile. These rates are multiplied by the total rearing reach length mapped by the SIT to estimate available habitat.
Data Source: Central Valley Floodplain Evaluation and Delineation (CVFED) HEC-RAS hydraulic model
A 17.1 mile portion of the entire mapped rearing extent of 17.1 miles was modeled using Central Valley Floodplain Evaluation and Delineation (CVFED) HEC-RAS hydraulic model. Of the entire mapped rearing extent, 17.1 miles were classified as low gradient and 0 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.
A 17.1 mile portion of the entire mapped rearing extent of 31.7 miles was modeled using Central Valley Floodplain Evaluation and Delineation (CVFED) HEC-RAS hydraulic model. Of the entire mapped rearing extent, 17.1 miles were classified as low gradient and 14.6 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.
The areas represent total inundated area in acres.
flow_cfs | FR_floodplain_acres | SR_floodplain_acres | ST_floodplain_acres | watershed |
---|---|---|---|---|
310 | 0.00 | 0.00 | 0.00 | Butte Creek |
410 | 19.61 | 21.27 | 21.27 | Butte Creek |
450 | 31.27 | 33.92 | 33.92 | Butte Creek |
510 | 48.76 | 52.89 | 52.89 | Butte Creek |
610 | 74.51 | 80.82 | 80.82 | Butte Creek |
… with 23 more rows