CSEMP assessment of chromium 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 | 38.29 | 40.54 | -16.14 | 32.29 | | | |
| linear | 2 | 40.00 | 44.58 | -16.00 | 32.00 | 0.282 | 1 | 0.5956 |
| smooth (df = 2) | 3 | 41.52 | 49.86 | -15.76 | 31.52 | 0.481 | 1 | 0.4880 |
| smooth (df = 3) | 4 | 43.46 | 57.86 | -15.73 | 31.46 | 0.063 | 1 | 0.8014 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2006 | 2018 | 5.174 | 5.338 | 0.16411 | 0.30693 | 0.535 | 0.6058 |
| last 20 years | 2006 | 2018 | 5.174 | 5.338 | 0.16411 | 0.30693 | 0.535 | 0.6058 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| ERL | 208.12 | 81.00 | -0.9437 | 0.1931 | -4.886 | 0.9996 |
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
