CSEMP assessment of naphthalene in sediment at Forth Estuary
Statistical analysis
Trend assessment
Analysis of variance
| Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
|---|---|---|---|---|---|---|---|---|
| mean | 1 | 98.02 | 100.02 | -46.01 | 92.02 | |||
| linear | 2 | 99.95 | 103.95 | -45.98 | 91.95 | 0.062 | 1 | 0.8035 |
| smooth (df = 2) | 3 | 100.80 | 107.94 | -45.40 | 90.80 | 1.158 | 1 | 0.2818 |
| smooth (df = 3) | 4 | 102.68 | 114.68 | -45.34 | 90.68 | 0.114 | 1 | 0.7354 |
Change in log concentration
| Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
|---|---|---|---|---|---|---|---|---|
| overall | 2006 | 2018 | 4.844 | 4.654 | -0.1909 | 0.7671 | -0.249 | 0.8085 |
| last 20 years | 2006 | 2018 | 4.844 | 4.654 | -0.1909 | 0.7671 | -0.249 | 0.8085 |
Status assessment
| Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
|---|---|---|---|---|---|---|
| BAC | 104.95 | 8.00 | -2.5741 | 0.4014 | -6.412 | 1.0000 |
| ERL | 104.95 | 160.00 | 0.4217 | 0.4014 | 1.050 | 0.1591 |
Related pages
- Clean Seas Environment Monitoring Programme (CSEMP) accessment viewer tool
- Assessment methodology for in sediment
- Accessment criteria for in sediment
Media : Sediment (< 63 micron fraction)
Station : Forth_Estuary_seSF (Forth Estuary)
Determinand : Naphthalene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Forth_Estuary_seSF (Forth Estuary)
Determinand : Naphthalene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020