CSEMP assessment of copper in sediment at Bann Estuary
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | 41.27 | 43.84 | -17.64 | 35.27 | | | |
| linear | 2 | 42.47 | 47.81 | -17.24 | 34.47 | 0.798 | 1 | 0.3718 |
| smooth (df = 2) | 3 | 44.10 | 54.10 | -17.05 | 34.10 | 0.375 | 1 | 0.5401 |
| smooth (df = 3) | 4 | 45.91 | 63.91 | -16.96 | 33.91 | 0.187 | 1 | 0.6653 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2006 | 2017 | 3.914 | 3.675 | -0.23905 | 0.26198 | -0.912 | 0.3882 |
| last 20 years | 2006 | 2017 | 3.914 | 3.675 | -0.23905 | 0.26198 | -0.912 | 0.3882 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 39.44 | 27.00 | -0.3790 | 0.1668 | -2.272 | 0.9736 |
| ERL | 39.44 | 34.00 | -0.1484 | 0.1668 | -0.890 | 0.8003 |
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
