CSEMP assessment of BD100 in sediment at Holy Loch (Clyde)
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | 16.06 | 20.56 | -5.03 | 10.06 | | | |
| linear | 2 | 15.35 | 26.01 | -3.67 | 7.35 | 2.712 | 1 | 0.0996 |
| smooth (df = 2) | 3 | 14.85 | 39.85 | -2.42 | 4.85 | 2.500 | 1 | 0.1139 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2006 | 2017 | -2.0622 | -2.7307 | -0.6686 | 0.3914 | -1.708 | 0.1483 |
| last 20 years | 2006 | 2017 | -2.0622 | -2.7307 | -0.6686 | 0.3914 | -1.708 | 0.1483 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 0.0652 | 0.0500 | -0.2650 | 0.2468 | -1.074 | 0.8340 |
| FEQG | 0.0652 | 1.0000 | 2.7307 | 0.2468 | 11.064 | <0.0001 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Organo-bromines data
Organo-bromines assessment
Related pages
