CSEMP assessment of benzo[a]anthracene in sediment at Hunterston (Clyde)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 154.39 | 155.59 | -74.19 | 148.39 | |||
linear | 2 | 156.29 | 158.58 | -74.15 | 148.29 | 0.098 | 1 | 0.7537 |
smooth (df = 2) | 3 | 158.00 | 161.84 | -74.00 | 148.00 | 0.296 | 1 | 0.5865 |
smooth (df = 3) | 4 | 157.23 | 163.23 | -72.62 | 145.23 | 2.764 | 1 | 0.0964 |
smooth (df = 4) | 5 | 156.41 | 165.32 | -71.20 | 142.41 | 2.822 | 1 | 0.0930 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2018 | 4.810 | 4.903 | 0.09279 | 0.29564 | 0.314 | 0.7577 |
last 20 years | 2000 | 2018 | 4.810 | 4.903 | 0.09279 | 0.29564 | 0.314 | 0.7577 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 134.65 | 16.00 | -2.1301 | 0.1567 | -13.591 | 1.0000 |
ERL | 134.65 | 261.00 | 0.6618 | 0.1567 | 4.223 | 0.0003 |
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 : Clyde_(Hunterston)_seSF, Hunterston (Clyde)
Determinand : Benzo[a]anthracene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Clyde_(Hunterston)_seSF, Hunterston (Clyde)
Determinand : Benzo[a]anthracene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020