Sediment quality of lower reaches of Okpoka Creek, Niger Delta, Nigeria
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Author
Davies, O.A.Date
2009
Metadata
Show full item recordAbstract
The sediment is the ultimate sink of contaminants in the aquatic systems. The physico-chemical quality of sediments lower reaches of Okpoka Creek was assessed for two years (wet and dry lsons).Sediment samples were collected at low and high tides from three stations according to standard methods. These were analysed for sediment particle size (sand, silt and clay), pH, total hydrocarbon (THC), total organic matter (TOM), total organic carbon (TOC) and conductivity. Analysis of variance (ANOVA), Duncan multiple range (DMR) and Pearson correlation cofficient were used to analyse the data. The sediment consisted of sand (57.86 ~c2.65%); silt 17.47~c1.68%) and clay (24.67~c1.33%). Sediment particle size showed significant spatial variation (p< 0.05).The sediment values pH (5.22~c0.27) and THC (0.24 ~c0.05g/g) were low unlike TOM (2.42~c0.26%), TOC (1.43~c0.17%) and conductivity (5077.61~c 847.88s/cm).The TOM and TOC values exceeded FEPA and USEPA acceptable levels in sediments. The presence high levels of TOM and TOC indicate organic pollution in the lower reaches of Okpoka Creek. Therefore, environmental surveillance of these parts of the creek is advocated.Page Range
12-15Publisher or University
Fisheries Society of NigeriaConference Name
23rd Annual Conference of the Fisheries Society of Nigeria (FISON)Conference Location
Kaduna, NigeriaConference Date
26 - 30 Oct 2008Collections