Future Data Improvements
None planned.
Instream Spawning and Rearing Habitat
No watershed specific instream spawning or rearing habitat data was available for Antelope 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 Deer Creek flow to floodplain area relationship generated with a 2D HEC-RAS hydraulic model. See Deer Creek HSI modeling documentation for more details.
There was no watershed specific hydraulic modeling available for Antelope Creek. A flow to inundated floodplain area relationship was generated for Antelope Creek by scaling the flow to inundated floodplain area relationship for Deer 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 Antelope Creek as 47% of Deer Creek. Of the entire mapped 31.6 miles rearing extent in Antelope Creek, 10.5 miles were classified as low gradient and 21.1 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.
Floodplain Data
The areas represent total inundated area in acres.
| flow_cfs | FR_floodplain_acres | SR_floodplain_acres | ST_floodplain_acres | watershed |
|---|---|---|---|---|
| 420 | 0.00 | 0.00 | 0.00 | Antelope Creek |
| 467 | 2.87 | 3.72 | 3.72 | Antelope Creek |
| 1401 | 41.08 | 53.12 | 53.12 | Antelope Creek |
| 2335 | 70.52 | 91.17 | 91.17 | Antelope Creek |
| 2802 | 80.92 | 104.62 | 104.62 | Antelope Creek |
…with 17 more rows
Floodplain Plot
