CSEMP assessment of benzo[a]pyrene in sediment at Tancred (Forth)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 36.48 | 42.48 | -15.24 | 30.48 | |||
linear | 2 | 38.34 | 54.34 | -15.17 | 30.34 | 0.136 | 1 | 0.7123 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2005 | 2018 | 4.140 | 4.346 | 0.2062 | 0.5583 | 0.369 | 0.7306 |
last 20 years | 2005 | 2018 | 4.140 | 4.346 | 0.2062 | 0.5583 | 0.369 | 0.7306 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 77.2 | 30.0 | -0.9447 | 0.4287 | -2.204 | 0.9539 |
ERL | 77.2 | 430.0 | 1.7179 | 0.4287 | 4.007 | 0.0080 |
Raw data with supporting information
Raw data with assessment
Assessment plot
PAH (parent) data
PAH (parent) assessment
Related pages
- Clean Seas Environment Monitoring Programme (CSEMP) accessment viewer tool
- Assessment methodology for pah_(parent) in sediment
- Accessment criteria for pah_(parent) in sediment
Media : Sediment (unsieved)
Station : Forth_LowerForthEstuary_se02, Tancred (Forth)
Determinand : Benzo[a]pyrene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Forth_LowerForthEstuary_se02, Tancred (Forth)
Determinand : Benzo[a]pyrene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020