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 | -13.87 | -10.27 | 9.94 | -19.87 | |||
linear | 2 | -11.88 | -3.88 | 9.94 | -19.88 | 0.006 | 1 | 0.9370 |
smooth (df = 2) | 3 | -9.91 | 6.76 | 9.95 | -19.91 | 0.028 | 1 | 0.8676 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2006 | 2013 | 3.0983 | 3.0841 | -0.01421 | 0.17767 | -0.080 | 0.9389 |
last 20 years | 2006 | 2013 | 3.0983 | 3.0841 | -0.01421 | 0.17767 | -0.080 | 0.9389 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 21.85 | 38.00 | 0.5535 | 0.1103 | 5.017 | 0.0012 |
ERL | 21.85 | 47.00 | 0.7661 | 0.1103 | 6.943 | 0.0002 |
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_se04 (Fladen Ground)
Determinand : Lead
Units : mg kg -1 dry weight normalised to 5% aluminium
Data extraction : 30 April 2020
Station : Fladen_FlaOpenSea_se04 (Fladen Ground)
Determinand : Lead
Units : mg kg -1 dry weight normalised to 5% aluminium
Data extraction : 30 April 2020