CSEMP assessment of copper in sediment at inner (Firth of Forth)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 56.45 | 57.65 | -25.22 | 50.45 | |||
linear | 2 | 56.62 | 58.90 | -24.31 | 48.62 | 1.831 | 1 | 0.1761 |
smooth (df = 2) | 3 | 58.51 | 62.36 | -24.26 | 48.51 | 0.106 | 1 | 0.7453 |
smooth (df = 3) | 4 | 60.51 | 66.51 | -24.26 | 48.51 | 0.001 | 1 | 0.9754 |
smooth (df = 4) | 5 | 60.17 | 69.08 | -23.09 | 46.17 | 2.338 | 1 | 0.1263 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 1999 | 2016 | 3.430 | 2.776 | -0.6538 | 0.4710 | -1.388 | 0.1841 |
last 20 years | 1999 | 2016 | 3.430 | 2.776 | -0.6538 | 0.4710 | -1.388 | 0.1841 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 16.06 | 27.00 | 0.5198 | 0.2759 | 1.884 | 0.0389 |
ERL | 16.06 | 34.00 | 0.7503 | 0.2759 | 2.720 | 0.0076 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Metals data
Metals assessment
Related pages
- Clean Seas Environment Monitoring Programme (CSEMP) accessment viewer tool
- Assessment methodology for metals in sediment
- Accessment criteria for metals in sediment
Media : Sediment (< 63 micron fraction)
Station : Firth_of_Forth_(inner)_seSF, inner (Firth of Forth)
Determinand : Copper
Units : mg kg -1 dry weight normalised to 5% aluminium
Data extraction : 30 April 2020
Station : Firth_of_Forth_(inner)_seSF, inner (Firth of Forth)
Determinand : Copper
Units : mg kg -1 dry weight normalised to 5% aluminium
Data extraction : 30 April 2020