CSEMP assessment of naphthalene 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 | 144.71 | 145.91 | -69.35 | 138.71 | |||
linear | 2 | 144.08 | 146.36 | -68.04 | 136.08 | 2.632 | 1 | 0.1048 |
smooth (df = 2) | 3 | 145.48 | 149.33 | -67.74 | 135.48 | 0.596 | 1 | 0.4399 |
smooth (df = 3) | 4 | 147.47 | 153.47 | -67.73 | 135.47 | 0.012 | 1 | 0.9134 |
smooth (df = 4) | 5 | 147.00 | 155.91 | -66.50 | 133.00 | 2.467 | 1 | 0.1162 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2018 | 4.011 | 3.389 | -0.6216 | 0.3740 | -1.662 | 0.1160 |
last 20 years | 2000 | 2018 | 4.011 | 3.389 | -0.6216 | 0.3740 | -1.662 | 0.1160 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 29.64 | 8.00 | -1.3098 | 0.2108 | -6.212 | 1.0000 |
ERL | 29.64 | 160.00 | 1.6859 | 0.2108 | 7.996 | <0.0001 |
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 : Naphthalene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Clyde_(Hunterston)_seSF, Hunterston (Clyde)
Determinand : Naphthalene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020