CSEMP assessment of lead in sediment at Fladen Ground
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | -27.29 | -23.69 | 16.65 | -33.29 | |||
linear | 2 | -25.76 | -17.76 | 16.88 | -33.76 | 0.469 | 1 | 0.4936 |
smooth (df = 2) | 3 | -25.32 | -8.65 | 17.66 | -35.32 | 1.561 | 1 | 0.2116 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2006 | 2013 | 3.186 | 3.128 | -0.05827 | 0.09561 | -0.609 | 0.5646 |
last 20 years | 2006 | 2013 | 3.186 | 3.128 | -0.05827 | 0.09561 | -0.609 | 0.5646 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 22.83 | 38.00 | 0.5097 | 0.0637 | 8.008 | 0.0001 |
ERL | 22.83 | 47.00 | 0.7223 | 0.0637 | 11.347 | <0.0001 |
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
Media : Sediment (unsieved)
Station : Fladen_FlaOpenSea_se02 (Fladen Ground)
Determinand : Lead
Units : mg kg -1 dry weight normalised to 5% aluminium
Data extraction : 30 April 2020
Station : Fladen_FlaOpenSea_se02 (Fladen Ground)
Determinand : Lead
Units : mg kg -1 dry weight normalised to 5% aluminium
Data extraction : 30 April 2020