Future Data Improvements
None planned.
Instream Spawning and Rearing Habitat
Data Source: Aceituno 1993 (pg. 19) and FWS 2012 (pg. 6)
The instream spawning and rearing habitat for Fall Run Chinook Salmon and Steelhead in the Stanislaus River are based on data from Aceituno 1993 and Fish and Wildlife Service (FWS) 2012. The Aceituno 1993 study uses the PHABSIM model, which was developed in 1989 in approximately 24 miles of the Stanislaus River. The model was created to examine the relationship between physical habitat availability and stream flow for Spawning Chinook Salmon. The original spawning data are on page 19 of the report. The rearing data come from the 2012 FWS CVPIA Annual progress report. The FWS used four sites on the river and conducted 2-D hydraulic modeling of all the sites. A graph representing the rearing totals for all sites is on page 6 of the report. The data were provided to us by Mark Gard from the California Department of Fish and Wildlife in a spreadsheet. Mark Gard instructed us to use I4:M33 of the ‘Stanislaus’ tab within the spreadsheet. These cells represent the sums of the rearing habitat in the Canyon Segment, Knights Ferry to Orange Blossom, Orange Blossom to Jacob Myers, and Jacob Myers to San Joaquin segments. The values were then converted from sqft to sqft/1000ft. The Stanislaus spawning data were compiled in a spreadsheet, and the 4 reaches were scaled by length to give a total spawning weighted usable area (WUA) value.
Spawning and Rearing Data
The instream spawning and rearing habitat data described above for Fall Run Chinook Salmon (FR) 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.
Spawning Habitat
| flow_cfs | FR_spawn_wua | watershed |
|---|---|---|
| 25 | 487.4042 | Stanislaus River |
| 50 | 1890.4458 | Stanislaus River |
| 100 | 5072.0208 | Stanislaus River |
| 150 | 7453.2542 | Stanislaus River |
| 200 | 8804.9417 | Stanislaus River |
… with 22 more rows
Rearing Habitat
| flow_cfs | FR_fry_wua | FR_juv_wua | ST_fry_wua | ST_juv_wua | watershed |
|---|---|---|---|---|---|
| 250 | 1969.659 | 895.7923 | 1704.340 | 983.7228 | Stanislaus River |
| 300 | 1776.423 | 993.6563 | 1688.437 | 1034.0579 | Stanislaus River |
| 400 | 1680.706 | 1129.1551 | 1626.900 | 1142.9350 | Stanislaus River |
| 500 | 1624.423 | 1189.6980 | 1554.709 | 1179.0442 | Stanislaus River |
| 600 | 1587.099 | 1203.3996 | 1503.706 | 1191.6194 | Stanislaus River |
… with 25 more rows
Spawning WUA
The following plot shows the spawning WUA in square feet per thousand feet for Fall 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 rearing WUA in square feet per thousand feet for Fall Run Chinook Salmon fry and juvenile. These rates are multiplied by the total rearing reach length mapped by the SIT to estimate available habitat.
Floodplain Modeling Details
Data Source: SRH-2D hyraulic model developed by NewFields (now FlowWest)
The entire mapped rearing extent of 60.3 miles was modeled using SRH-2D hyraulic model developed by NewFields (now FlowWest www.flowwest.com). An active channel area of 409.1 acres, estimated through remote sensing analysis, was subtracted from total inundated area to obtain inundated floodplain area.
Floodplain Data
The areas represent total inundated area in acres.
| flow_cfs | FR_floodplain_acres | SR_floodplain_acres | ST_floodplain_acres | watershed |
|---|---|---|---|---|
| 250 | 0.00 | 0.00 | 0.00 | Stanislaus River |
| 500 | 3.31 | 3.31 | 3.31 | Stanislaus River |
| 750 | 7.55 | 7.55 | 7.55 | Stanislaus River |
| 1000 | 12.42 | 12.42 | 12.42 | Stanislaus River |
| 1250 | 40.48 | 40.48 | 40.48 | Stanislaus River |
… with 10 more rows
Floodplain Plot
