Future Data Improvements

None planned.

Instream Spawning and Rearing Habitat

Data Source: Calculated with a relationship between flow and mean weighted usable area from watersheds in the region with modeled habitat

No watershed specific instream spawning or rearing habitat data was available for Bear 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 Bear Creek. A flow to inundated floodplain area relationship was generated for Bear 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 Bear Creek as 25% of Deer Creek. Of the entire mapped 17.3 miles rearing extent in Bear Creek, 4.3 miles were classified as low gradient and 13 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

Header Descriptions: flow_cfs = flow in cubic feet per second, FR_floodplain_acres = Fall Run Chinook floodplain acres, ST_floodplain_acres = Steelhead floodplain acres, watershed = section of stream modeled for CVPIA SDM
flow_cfs FR_floodplain_acres ST_floodplain_acres watershed
229 0.00 0.00 Bear Creek
254 0.70 0.90 Bear Creek
762 9.96 12.88 Bear Creek
1269 17.10 22.11 Bear Creek
1523 19.62 25.37 Bear Creek

… with 8 more rows

Floodplain Plot