CSEMP assessment of naphthalene in sediment at Off Southend-on-sea (Thames)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 37.16 | 43.16 | -15.58 | 31.16 | |||
linear | 2 | 37.60 | 53.60 | -14.80 | 29.60 | 1.558 | 1 | 0.2120 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2005 | 2017 | 3.583 | 4.412 | 0.8297 | 0.6224 | 1.333 | 0.2534 |
last 20 years | 2005 | 2017 | 3.583 | 4.412 | 0.8297 | 0.6224 | 1.333 | 0.2534 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 82.46 | 8.00 | -2.3329 | 0.4608 | -5.063 | 0.9964 |
ERL | 82.46 | 160.00 | 0.6629 | 0.4608 | 1.438 | 0.1118 |
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 : Anglia_Essex_se02, Off Southend-on-sea (Thames)
Determinand : Naphthalene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Anglia_Essex_se02, Off Southend-on-sea (Thames)
Determinand : Naphthalene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020