CSEMP assessment of benzo[a]pyrene 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 | 248.86 | 250.66 | -121.43 | 242.86 | |||
linear | 2 | 250.57 | 254.13 | -121.29 | 242.57 | 0.287 | 1 | 0.5922 |
smooth (df = 2) | 3 | 249.52 | 255.77 | -119.76 | 239.52 | 3.053 | 1 | 0.0806 |
smooth (df = 3) | 4 | 249.86 | 260.15 | -118.93 | 237.86 | 1.661 | 1 | 0.1975 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2018 | 4.552 | 4.128 | -0.4235 | 0.7888 | -0.537 | 0.6020 |
last 20 years | 2000 | 2018 | 4.552 | 4.128 | -0.4235 | 0.7888 | -0.537 | 0.6020 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 62.1 | 30.0 | -0.7272 | 0.4506 | -1.614 | 0.9326 |
ERL | 62.1 | 430.0 | 1.9354 | 0.4506 | 4.295 | 0.0006 |
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]pyrene
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]pyrene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020