STARDUST II - Spatial and Temporal Assessment
of high Resolution Depth profiles Using novel Sampling Technologies The fate of pollutants in fluvial and marine sediments in cross-border zones
Trace metals in sediments from the Humber estuary: a statistical analysis of spatial uniformity
Grant, G.; Middleton, R. (1993). Trace metals in sediments from the Humber estuary: a statistical analysis of spatial uniformity. Neth. J. Aquat. Ecol. 27(2-4): 111-120. https://dx.doi.org/10.1007/BF02334774
In: Netherlands Journal of Aquatic Ecology. Kluwer Academic Publishers/Netherlands Society of Aquatic Ecology: Bilthoven. ISSN 1380-8427; e-ISSN 2214-7098
Ook verschenen in:
Meire, P.; Vincx, M. (Ed.) (1993). Marine and estuarine gradients: ECSA 21: Proceedings of the 21st symposium of the Estuarine and Coastal Sciences Association held in Gent, 9-14 september 1991. Netherlands Journal of Aquatic Ecology, 27(2-4). Netherlands Society of Aquatic Ecology: Bilthoven. 496 pp., meer
Concentrations of seven heavy metals (Cu, Zn, Ni, Cr, Nb, Pb, As) in sediments of the Humber estuary and its tributary rivers have been examined using a variety of statistical methods. Concentrations of metals are rather uniform once the effect of grain size is adjusted for. This uniformity extends for some distance beyond the turbidity maximum, and in fact well beyond the normal limit of salt penetration. Detailed statistical analysis of the data do however reveal some trend of concentrations with position in the estuary, with concentrations of Zn, Ni and Pb being slightly lower towards the mouth of the estuary. Nb concentrations are higher near the mouth of the Humber, but this reflects the location of two large discharges of Nb here. Once these anomalous samples are removed, Nb concentrations are also shown to be spatially homogeneous. The spatial trends in Zn, Ni and Pb may be due to inputs of very contaminated particulate matter to the upper estuary, to inward transport of uncontaminated clay particles from the North Sea to the lower estuary or to the exchange of metals between particulate matter and water. There are however also spatial trends in sediment particle diameter, so some caution needs to be exercised in drawing conclusions.
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STARDUST II is a project funded by the INTERREG III A programme (France/Walloon Region/Flanders
French-Flemish subprogramme) of the European Community's Regional Development Fund.
Hosted by the Flanders Marine Institute (VLIZ)
