CSEMP assessment of anthracene 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 | 109.77 | 111.27 | -51.88 | 103.77 | |||
linear | 2 | 111.66 | 114.57 | -51.83 | 103.66 | 0.106 | 1 | 0.7449 |
smooth (df = 2) | 3 | 113.50 | 118.50 | -51.75 | 103.50 | 0.160 | 1 | 0.6894 |
smooth (df = 3) | 4 | 115.49 | 123.49 | -51.74 | 103.49 | 0.010 | 1 | 0.9222 |
smooth (df = 4) | 5 | 117.34 | 129.59 | -51.67 | 103.34 | 0.146 | 1 | 0.7025 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2018 | 4.567 | 4.379 | -0.187 | 0.574 | -0.326 | 0.7497 |
last 20 years | 2000 | 2018 | 4.567 | 4.379 | -0.187 | 0.574 | -0.326 | 0.7497 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 79.8 | 5.0 | -2.7700 | 0.2900 | -9.553 | 1.0000 |
ERL | 79.8 | 85.0 | 0.0632 | 0.2900 | 0.218 | 0.4154 |
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 : Anthracene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Forth_Estuary_seSF (Forth Estuary)
Determinand : Anthracene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020