Future Data Improvements
None planned.
Instream Spawning and Rearing Habitat
No watershed specific instream spawning or rearing habitat data was available for Thomes Creek. Instream spawning and rearing data were developed using similar watersheds in the Upper-mid Sacramento River Region to create a regional approximation.
Floodplain Rearing Habitat
Data Source: Scaled from a Cottonwood Creek flow to floodplain area relationship generated with a USFWS / FEMA 1D HEC-RAS hydraulic model. See Cottonwood Creek modeling documentation for more details.
Fall Run
There was no watershed specific hydraulic modeling available for Thomes Creek. A flow to inundated floodplain area relationship was generated for Thomes Creek by scaling the flow to inundated floodplain area relationship for Cottonwood Creek. This scaling used the ratio of mean flow from December to June between the modeled and unmodeled watershed. Flows and corresponding inundated floodplain areas per unit length were calculated for Thomes Creek as 37% of Cottonwood Creek. Of the entire mapped 37.5 miles rearing extent in Thomes Creek, 37.5 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 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.
Spring Run and Steelhead
Floodplain Data
The areas represent total inundated area in acres.
| flow_cfs | FR_floodplain_acres | ST_floodplain_acres | watershed |
|---|---|---|---|
| 15 | 0.00 | 0.00 | Thomes Creek |
| 147 | 4.82 | 7.50 | Thomes Creek |
| 280 | 8.30 | 12.93 | Thomes Creek |
| 412 | 13.30 | 20.72 | Thomes Creek |
| 544 | 17.54 | 27.32 | Thomes Creek |
… with 27 more rows
Floodplain Plot
