CSEMP assessment of dibenzothiophene in sediment at Forth Estuary
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 77.69 | 81.29 | -35.84 | 71.69 | |||
linear | 2 | 79.62 | 87.62 | -35.81 | 71.62 | 0.071 | 1 | 0.7893 |
smooth (df = 2) | 3 | 81.60 | 98.27 | -35.80 | 71.60 | 0.019 | 1 | 0.8895 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2011 | 2018 | 2.8509 | 3.0595 | 0.2087 | 0.7788 | 0.268 | 0.7977 |
last 20 years | 2011 | 2018 | 2.8509 | 3.0595 | 0.2087 | 0.7788 | 0.268 | 0.7977 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
ERL | 21.32 | 190.00 | 2.1875 | 0.4679 | 4.675 | 0.0017 |
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_Estuary_seSF (Forth Estuary)
Determinand : Dibenzothiophene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Forth_Estuary_seSF (Forth Estuary)
Determinand : Dibenzothiophene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020