CSEMP assessment of chromium in sediment at Off Tees
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 1.14 | 10.14 | 2.43 | -4.86 | |||
linear | 2 | -0.86 | 31.14 | 4.43 | -8.86 | 4.001 | 1 | 0.0455 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2010 | 2017 | 4.720 | 4.406 | -0.31430 | 0.14548 | -2.160 | 0.1195 |
last 20 years | 2010 | 2017 | 4.720 | 4.406 | -0.31430 | 0.14548 | -2.160 | 0.1195 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
ERL | 81.92 | 81.00 | -0.01134 | 0.06206 | -0.183 | 0.5667 |
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 (< 63 micron fraction)
Station : TyneTees_TTInter_se02 (Off Tees)
Determinand : Chromium
Units : mg kg -1 dry weight normalised to 5% aluminium
Data extraction : 30 April 2020
Station : TyneTees_TTInter_se02 (Off Tees)
Determinand : Chromium
Units : mg kg -1 dry weight normalised to 5% aluminium
Data extraction : 30 April 2020