CSEMP assessment of benzo[a]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 | 71.87 | 74.12 | -32.94 | 65.87 | |||
| linear | 2 | 73.62 | 78.19 | -32.81 | 65.62 | 0.253 | 1 | 0.6150 |
| smooth (df = 2) | 3 | 74.28 | 82.61 | -32.14 | 64.28 | 1.342 | 1 | 0.2466 |
| smooth (df = 3) | 4 | 76.27 | 90.67 | -32.14 | 64.27 | 0.005 | 1 | 0.9425 |
Change in log concentration
| Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
|---|---|---|---|---|---|---|---|---|
| overall | 2000 | 2018 | 5.220 | 4.859 | -0.3606 | 0.7129 | -0.506 | 0.6252 |
| last 20 years | 2000 | 2018 | 5.220 | 4.859 | -0.3606 | 0.7129 | -0.506 | 0.6252 |
Status assessment
| Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
|---|---|---|---|---|---|---|
| BAC | 128.91 | 16.00 | -2.0866 | 0.4219 | -4.945 | 0.9996 |
| ERL | 128.91 | 261.00 | 0.7054 | 0.4219 | 1.672 | 0.0644 |
Related pages
- Clean Seas Environment Monitoring Programme (CSEMP) accessment viewer tool
- Assessment methodology for in sediment
- Accessment criteria for in sediment
Media : Sediment (unsieved)
Station : Forth_Estuary_seSF (Forth Estuary)
Determinand : Benzo[a]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 : Benzo[a]anthracene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020