CSEMP assessment of naphthalene in sediment at Solway Firth
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 140.55 | 141.84 | -67.28 | 134.55 | |||
linear | 2 | 140.27 | 142.73 | -66.13 | 132.27 | 2.282 | 1 | 0.1309 |
smooth (df = 2) | 3 | 130.64 | 134.81 | -60.32 | 120.64 | 11.629 | 1 | 0.0006 |
smooth (df = 3) | 4 | 132.63 | 139.17 | -60.31 | 120.63 | 0.015 | 1 | 0.9028 |
smooth (df = 4) | 5 | 133.86 | 143.66 | -59.93 | 119.86 | 0.764 | 1 | 0.3822 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2001 | 2018 | 4.807 | 4.403 | -0.4034 | 0.2129 | -1.895 | 0.0790 |
last 20 years | 2001 | 2018 | 4.807 | 4.403 | -0.4034 | 0.2129 | -1.895 | 0.0790 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 81.74 | 8.00 | -2.3240 | 0.1725 | -13.474 | 1.0000 |
ERL | 81.74 | 160.00 | 0.6717 | 0.1725 | 3.894 | 0.0008 |
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 : Solway_Firth_seSF (Solway Firth)
Determinand : Naphthalene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Solway_Firth_seSF (Solway Firth)
Determinand : Naphthalene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020