CSEMP assessment of benzo[a]anthracene 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 | 253.08 | 254.88 | -123.54 | 247.08 | |||
linear | 2 | 254.90 | 258.46 | -123.45 | 246.90 | 0.182 | 1 | 0.6694 |
smooth (df = 2) | 3 | 254.97 | 261.22 | -122.48 | 244.97 | 1.932 | 1 | 0.1645 |
smooth (df = 3) | 4 | 255.68 | 265.97 | -121.84 | 243.68 | 1.285 | 1 | 0.2570 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2018 | 4.560 | 4.192 | -0.3680 | 0.8594 | -0.428 | 0.6768 |
last 20 years | 2000 | 2018 | 4.560 | 4.192 | -0.3680 | 0.8594 | -0.428 | 0.6768 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 66.17 | 16.00 | -1.4196 | 0.4911 | -2.891 | 0.9927 |
ERL | 66.17 | 261.00 | 1.3723 | 0.4911 | 2.794 | 0.0087 |
Raw data with supporting information
Raw data with assessment
Assessment plot
PAH (parent) data
PAH (parent) assessment
Related pages
- Clean Seas Environment Monitoring Programme (CSEMP) accessment viewer tool
- Assessment methodology for pah_(parent) in sediment
- Accessment criteria for pah_(parent) in sediment
Media : Sediment (< 63 micron fraction)
Station : MinchMalin_BannEstuary_se01 (Bann Estuary)
Determinand : Benzo[a]anthracene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : MinchMalin_BannEstuary_se01 (Bann Estuary)
Determinand : Benzo[a]anthracene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020