FPC SMP Multi-Year Regression Input Data Including Multi-Year Reach Annual Survival Estimates and Fish Travel Times

This query allows users to review and download annual smolt survival estimates, fish travel time estimates, water transit times, average spill and water temperatures for Chinook yearlings, Chinook subyearlings, steelhead and sockeye for three reaches: Lower Granite Dam to McNary Dam, McNary Dam to Bonneville Dam and Rock Island Dam to McNary Dam. These data were reported in the 2014 FPC Annual Report, smolt monitoring chapter, section H, entitled "Reach Survival Analyses".

Click here for a detailed discussion of this data found in the FPC 2014 Annual Report, Chapter IV 2014 Smolt Monitoring.



Field nameDescription
yearMigration year of juvenile pittaged fish used in reach survival estimates.
reldatesRange of dates used for survival cohort, ranges from 1 to 4 weeks.
medianfttMedian Fish travel time is the median number of days from PIT-tag detection at upper dam to lowest dam in reach.
survivalEstimated survival from tailwater of upper dam to lowest dam using CJS methodology. The majority of the Smolt Monitoring Program (SMP) survival estimates are calculated for evaluation of hydrosystem effects in particular reaches on aggregate PIT-tag populations. These aggregates incorporate all available PIT tags to estimate survival for the run-at-large. Reach survival estimates are divided into short time intervals so that environmental effects such as flow, spill and temperature can be evaluated in relation to survival. Additionally in a few cases, survival is estimated for specific SMP releases of interest such as from large traps or other smolt monitoring facilities (e.g. Snake River Trap or Rock Island Dam). Releases from these specific sites of interest are on an annual smolt migration basis.
varianceVariance around survival estimate adjusted for over dispersion (c-hat).
wttWater Transit time. Number of days for water volume in reservoir to pass downstream project based on discharge.
avgspillAverage spill percentage for all dams in the reach during cohort passage (based on median FTT plus or minus the number of days in release.
temp_cAverage temperature at tailwater tdgs monitors at all dams in the reach.
speciesCh = Chinook, st = steelhead, soc = sockeye. Combining the species and year code: Ch1 = yearling Chinook, Ch0 = subyearling Chinook
rearcodeRearing code is either H for hatchery, W for wild or empty or null for unknown.
ageAge is the number of years (winters) of freshwater residence since emergence from egg. (Literally the number of new years days in freshwater).
reachThe series of dams that were included in survival estimation. LGRMCN - Lower Granite Dam to McNary Dam; MCNBON - McNary Dam to Bonneville Dam; RISMCN - Rock Island Dam to McNary Dam.




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