CSEMP assessment of zinc in sediment at Woolwich (Thames)

Statistical analysis

Trend assessment

Analysis of variance

 DfAICAICcLog likDevianceChisqChi dfPr(>Chisq)
mean17.6710.24-0.83 1.67
linear26.7412.08 0.63-1.262.926 10.0871
smooth (df = 2)37.2917.29 1.35-2.711.451 10.2283
smooth (df = 3)46.6024.60 2.70-5.402.690 10.1010

Change in log concentration

 Year startYear endFit startFit endChangeStd errortPr(>|t|)
last 20 years199920125.8156.6600.84480.45961.8380.1033

Status assessment

 Conc fittedConc refLog ratioStd errortPr(>t)
BAC780.5122.0-1.8559 0.3056-6.0730.9999
ERL780.5150.0-1.6493 0.3056-5.3970.9997


Related pages

  • Clean Seas Environment Monitoring Programme (CSEMP) accessment viewer tool
  • Assessment methodology for in sediment
  • Accessment criteria for in sediment