CSEMP assessment of CB28 in sediment at Bann Estuary
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 96.17 | 99.17 | -45.08 | 90.17 | |||
linear | 2 | 95.85 | 102.25 | -43.93 | 87.85 | 2.310 | 1 | 0.1285 |
smooth (df = 2) | 3 | 94.45 | 106.95 | -42.22 | 84.45 | 3.405 | 1 | 0.0650 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2001 | 2018 | -2.139 | -3.272 | -1.1333 | 0.6638 | -1.707 | 0.1315 |
last 20 years | 2001 | 2018 | -2.139 | -3.272 | -1.1333 | 0.6638 | -1.707 | 0.1315 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 0.0379 | 0.2200 | 1.758 | 0.335 | 5.240 | 0.0006 |
EAC | 0.0379 | 1.7000 | 3.803 | 0.335 | 11.335 | <0.0001 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
- Clean Seas Environment Monitoring Programme (CSEMP) accessment viewer tool
- Assessment methodology for chlorobiphenyls in sediment
- Accessment criteria for chlorobiphenyls in sediment
Media : Sediment (< 63 micron fraction)
Station : MinchMalin_BannEstuary_se01 (Bann Estuary)
Determinand : CB28
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : MinchMalin_BannEstuary_se01 (Bann Estuary)
Determinand : CB28
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020