CSEMP assessment of benzo[g,h,i]perylene in sediment at Holy Loch (Clyde)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 51.76 | 53.14 | -22.88 | 45.76 | |||
linear | 2 | 47.41 | 50.08 | -19.71 | 39.41 | 6.344 | 1 | 0.0118 |
smooth (df = 2) | 3 | 48.00 | 52.55 | -19.00 | 38.00 | 1.410 | 1 | 0.2350 |
smooth (df = 3) | 4 | 49.38 | 56.58 | -18.69 | 37.38 | 0.624 | 1 | 0.4296 |
smooth (df = 4) | 5 | 45.41 | 56.30 | -15.71 | 31.41 | 5.968 | 1 | 0.0146 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2018 | 6.393 | 5.514 | -0.8792 | 0.3183 | -2.762 | 0.0153 |
last 20 years | 2000 | 2018 | 6.393 | 5.514 | -0.8792 | 0.3183 | -2.762 | 0.0153 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 248.2 | 80.0 | -1.1322 | 0.2119 | -5.344 | 0.9999 |
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_FirthCInnerDunoon_se06, Holy Loch (Clyde)
Determinand : Benzo[g,h,i]perylene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Clyde_FirthCInnerDunoon_se06, Holy Loch (Clyde)
Determinand : Benzo[g,h,i]perylene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020