Future Data Improvements

None planned.

Instream Spawning and Rearing Habitat

Data Source: Thomas R. Payne & Associates 1995 (pg C-1) and Thomas R. Payne & Associates 1998 (pg C-1)

The instream spawning and rearing habitat for Fall Run Chinook Salmon, Spring Run Chinook Salmon, and Steelhead in Battle Creek are based on data from Thomas R. Payne & Associates’ 1995 instream flow evaluations. The Winter Run in Battle Creek are based on the 1998 instream flow evaluations. The flow evaluations were conducted for the California Department of Fish and Wildlife. They uncovered relationships between flow and both suitable spawning habitat and suitable rearing habitat from seven study reaches in Battle Creek. For both species, the weighted usable area (WUA) data were consolidated from all mainstem reaches.

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.

Fall Run

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 watershed = section of stream modeled for CVPIA SDM
flow_cfs FR_spawn_wua FR_fry_wua FR_juv_wua watershed
8 130.33 15577.42 4951.72 Battle Creek
10 200.10 15410.91 5858.00 Battle Creek
12 275.77 15181.16 6704.73 Battle Creek
14 358.81 14928.81 7488.45 Battle Creek
16 435.23 14661.05 8211.50 Battle Creek
18 513.79 14371.35 8879.50 Battle Creek

… with 30 more rows

Spring Run

Header Descriptions: flow_cfs = flow in cubic feet per second, SR_spawn_wua = Spring Run Chinook Spawning WUA, SR_fry_wua = Spring Run Chinook Fry WUA, SR_juv_wua = Spring Run Chinook Juvenile WUA watershed = section of stream modeled for CVPIA SDM
flow_cfs SR_spawn_wua SR_fry_wua SR_juv_wua watershed
8 614.98 15577.42 4951.72 Battle Creek
10 761.60 15410.91 5858.00 Battle Creek
12 897.95 15181.16 6704.73 Battle Creek
14 1034.54 14928.81 7488.45 Battle Creek
16 1177.36 14661.05 8211.50 Battle Creek
18 1312.89 14371.35 8879.50 Battle Creek

… with 30 more rows

Steelhead

Header Descriptions: flow_cfs = flow in cubic feet per second, ST_spawn_wua = Spring Run Chinook Spawning WUA, ST_fry_wua = Steelhead Chinook Fry WUA, SR_juv_wua = Steelhead Chinook Juvenile WUA, ST_adult_wua = Steelhead Adult Rearing WUA, watershed = section of stream modeled for CVPIA SDM
flow_cfs ST_spawn_wua ST_fry_wua ST_juv_wua ST_adult_wua watershed
8 266.30 4612.27 13056.70 9122.98 Battle Creek
10 364.83 4289.54 13667.70 9728.00 Battle Creek
12 458.80 4035.90 14128.02 10253.11 Battle Creek
14 565.26 3809.16 14464.77 10711.28 Battle Creek
16 680.82 3588.96 14722.92 11113.88 Battle Creek
18 778.70 3409.46 14899.43 11459.39 Battle Creek

… with 30 more rows

Winter Run

Header Descriptions: flow_cfs = flow in cubic feet per second, WR_spawn_wua = Winter Run Chinook Spawning WUA, WR_fry_wua = Winter Run Chinook Fry WUA, WR_juv_wua = Winter Run Chinook Juvenile WUA watershed = section of stream modeled for CVPIA SDM
flow_cfs WR_spawn_wua WR_fry_wua WR_juv_wua watershed
8 567.2981 11857.47 4126.819 Battle Creek
10 707.4497 11679.59 4923.229 Battle Creek
12 850.7454 11432.35 5712.370 Battle Creek
14 969.3630 11216.95 6354.508 Battle Creek
16 1066.4405 10985.86 6944.252 Battle Creek
18 1153.4530 10734.30 7473.724 Battle Creek

… with 30 more rows

Spawning WUA

The following plot shows the spawning WUA in square feet per thousand feet for Fall Run Chinook Salmon, Steelhead, and 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.

Rearing WUA

The following plot shows the weighted usable rearing area 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: 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.

Fall Run

There was no watershed specific hydraulic modeling available for Battle Creek. A flow to inundated floodplain area relationship was generated for Battle 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 Battle Creek as 147% of Deer Creek. Of the entire mapped 5.9 miles rearing extent in Battle Creek, 5.9 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.

Late Fall Run

There was no watershed specific hydraulic modeling available for Battle Creek. A flow to inundated floodplain area relationship was generated for Battle 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 Battle Creek as 147% of Deer Creek. Of the entire mapped 16.6 miles rearing extent in Battle Creek, 5.9 miles were classified as low gradient and 10.7 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.

Winter Run

There was no watershed specific hydraulic modeling available for Battle Creek. A flow to inundated floodplain area relationship was generated for Battle 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 Battle Creek as 147% of Deer Creek. Of the entire mapped 18.5 miles rearing extent in Battle Creek, 5.9 miles were classified as low gradient and 12.6 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

There was no watershed specific hydraulic modeling available for Battle Creek. A flow to inundated floodplain area relationship was generated for Battle 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 Battle Creek as 147% of Deer Creek. Of the entire mapped 24.4 miles rearing extent in Battle Creek, 5.9 miles were classified as low gradient and 18.5 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.

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, WR_floodplain_acres = Winter Run floodplain acres, ST_floodplain_acres = Steelhead floodplain acres, LFR_floodplain_acres = Late Fall Run Chinook floodplain acres, watershed = section of stream modeled for CVPIA SDM
flow_cfs FR_floodplain_acres SR_floodplain_acres WR_floodplain_acres ST_floodplain_acres LFR_floodplain_acres watershed
1325 0.00 0.00 0.00 0.00 0.00 Battle Creek
1473 4.22 7.18 5.13 7.18 5.00 Battle Creek
4418 60.38 102.72 73.37 102.72 71.44 Battle Creek
7363 103.65 176.32 125.94 176.32 122.62 Battle Creek
8836 118.93 202.32 144.51 202.32 140.70 Battle Creek

… with 8 more rows

Floodplain Plot