CSEMP assessment of lead in sediment at Billingham-Bamlett's Bight (Tees)
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | 50.80 | 52.60 | -22.40 | 44.80 | | | |
| linear | 2 | 52.54 | 56.09 | -22.27 | 44.54 | 0.265 | 1 | 0.6069 |
| smooth (df = 2) | 3 | 54.09 | 60.34 | -22.04 | 44.09 | 0.450 | 1 | 0.5022 |
| smooth (df = 3) | 4 | 55.86 | 66.15 | -21.93 | 43.86 | 0.224 | 1 | 0.6361 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 1999 | 2013 | 6.078 | 6.322 | 0.2436 | 0.4718 | 0.516 | 0.6159 |
| last 20 years | 1999 | 2013 | 6.078 | 6.322 | 0.2436 | 0.4718 | 0.516 | 0.6159 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 556.7 | 38.0 | -2.6845 | 0.2964 | -9.056 | 1.0000 |
| ERL | 556.7 | 47.0 | -2.4719 | 0.2964 | -8.338 | 1.0000 |
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
