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| Titel |
Riverine sediment-associated metal concentrations in the urban tropics: a case study from Singapore |
| VerfasserIn |
James Rothwell, Wan Aik Lee |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250033596
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| Zusammenfassung |
| The impact of urbanization on river water quality is well recognized, but there is a paucity of
data on sediment-associated metal dynamics in urban systems in the tropics. To begin
addressing this deficiency, suspended sediment samples were collected from two residential
urban catchments in Singapore; Jurong West (JW) and Ang Mo Kio (AMK). Impervious
cover accounts for 84% and 60% in JW and AMK respectively. Approximately 100
suspended sediment samples were retrieved from each site under tropical storm
conditions between March 2005 and August 2006. Sediment samples were analyzed
for Cr, Cu, Ni, Pb and Zn, together with a range of common cations. Trace metal
concentrations are highly variable under storm conditions in both catchments. Maximum
concentrations exceed 100 mg kg-1 for Cr and Ni, 800 mg kg-1 for Cu and Pb, and
4000 mg kg-1 for Zn. At JW, there is a significant (p |
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