CSEMP assessment of naphthalene 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 | 55.39 | 56.78 | -24.70 | 49.39 | |||
linear | 2 | 49.29 | 51.96 | -20.65 | 41.29 | 8.099 | 1 | 0.0044 |
smooth (df = 2) | 3 | 48.67 | 53.21 | -19.33 | 38.67 | 2.624 | 1 | 0.1053 |
smooth (df = 3) | 4 | 50.01 | 57.21 | -19.00 | 38.01 | 0.663 | 1 | 0.4155 |
smooth (df = 4) | 5 | 48.72 | 59.61 | -17.36 | 34.72 | 3.288 | 1 | 0.0698 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2018 | 5.129 | 4.020 | -1.1088 | 0.3444 | -3.219 | 0.0062 |
last 20 years | 2000 | 2018 | 5.129 | 4.020 | -1.1088 | 0.3444 | -3.219 | 0.0062 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 55.69 | 8.00 | -1.9404 | 0.2254 | -8.607 | 1.0000 |
ERL | 55.69 | 160.00 | 1.0554 | 0.2254 | 4.681 | 0.0002 |
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 : Naphthalene
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 : Naphthalene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020