CSEMP assessment of mercury 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 | 92.73 | 94.98 | -43.37 | 86.73 | | | |
| linear | 2 | 94.51 | 99.09 | -43.26 | 86.51 | 0.216 | 1 | 0.6419 |
| smooth (df = 2) | 3 | 95.00 | 103.34 | -42.50 | 85.00 | 1.511 | 1 | 0.2190 |
| smooth (df = 3) | 4 | 96.99 | 111.39 | -42.50 | 84.99 | 0.013 | 1 | 0.9104 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 1999 | 2013 | 0.0057 | 0.3912 | 0.3854 | 0.8246 | 0.467 | 0.6513 |
| last 20 years | 1999 | 2013 | 0.0057 | 0.3912 | 0.3854 | 0.8246 | 0.467 | 0.6513 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 1.4787 | 0.0700 | -3.0504 | 0.4696 | -6.496 | 0.9999 |
| ERL | 1.4787 | 0.1500 | -2.2883 | 0.4696 | -4.873 | 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
