CSEMP assessment of chromium in sediment at Lough Foyle
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | -6.92 | -4.92 | 6.46 | -12.92 | | | |
| linear | 2 | -5.93 | -1.93 | 6.96 | -13.93 | 1.012 | 1 | 0.3145 |
| smooth (df = 2) | 3 | -4.44 | 2.71 | 7.22 | -14.44 | 0.510 | 1 | 0.4752 |
| smooth (df = 3) | 4 | -2.71 | 9.29 | 7.36 | -14.71 | 0.276 | 1 | 0.5993 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2003 | 2018 | 4.250 | 4.444 | 0.19324 | 0.18918 | 1.021 | 0.3311 |
| last 20 years | 2003 | 2018 | 4.250 | 4.444 | 0.19324 | 0.18918 | 1.021 | 0.3311 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| ERL | 85.08 | 81.00 | -0.04919 | 0.10208 | -0.482 | 0.6799 |
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
