Dominance of point source in heavy metal distributions in sediments of a major Sydney estuary (Australia) |
| |
| Authors: | G F Birch D Evenden M E Teutsch |
| |
| Institution: | (1) Environmental Geology Group, Geology and Geophysics Department, University of Sydney, NSW, 2006, Australia, AU |
| |
| Abstract: | Size-normalized (<63 μm) distributions of Cu, Zn, and Pb in the surficial sediments of one of Sydneys' four major estuaries
– the Georges River/Botany Bay estuary – are not facies or depositionally controlled, but rather their distribution is dominated
by source. Point sources (waste dumps, sewage overflows, and discharge from a polluted river) are responsible for elevating
sediment heavy-metal concentrations up to 50 times above background. Nonpoint sources contribute in raising baseline levels
to four times background and comprise mainly stormwater and also marinas, moorings, and wharfs/jetties. Heavy metals disgorged
from a point source (Cooks River) strongly impact the sediments in the lower estuary, which has implications for the construction
of a new runway for Sydney airport.
Received: 3 October 1994 · Accepted: 21 September 1995 |
| |
| Keywords: | Metallic contaminants Estuaries Point sources Non point sources Baseline concentrations Background concentrations Contaminant dispersal |
| 本文献已被 SpringerLink 等数据库收录！ |
|
