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Spatial variations in heavy metals on tidal flats in the Yangtze Estuary,China |
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| Authors: | S?Gorenc |
| Institution: | (1) Parish Geomorphic, 10 Mountainview Road South, Suite 207, Georgetown, ON, L7G4J9, Canada;(2) Department of Geography, University of Guelph, Guelph, ON, N1G 2W1, Canada;(3) State Key Laboratory of Estuarine and Coastal Research, East China Normal University, 200062 Shanghai, China |
| Abstract: | Surface samples are used to determine onshore-offshore variations in heavy metal concentrations on tidal flats on Chongming and Hengsha Islands in the Yangtze Estuary, China. The Mann-Whitney U-Test suggests that proximity to the estuarine turbidity maximum does not result in significantly higher metal concentrations on tidal flats. Principal Components Analysis shows that grain-size is the primary control on metal concentrations, reflecting the occurrence of salt marsh and mud and sand flats. Sediment quality is comparable to that of pristine estuaries because of dilution by high river sediment loads. |
| Keywords: | Heavy metals Sediment Tidal flats Yangtze Estuary China |
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