Groundwater or floodwater? Assessing the pathways of metal exports from a coastal acid sulfate soil catchment
作者： Isaac R. Santos , Jason de Weys , Bradley D. Eyre
DOI: 10.1021/ES202581H
关键词:
摘要: Daily observations of dissolved aluminum, iron, and manganese in an estuary downstream a coastal acid sulfate soil (CASS) catchment provided insights into how floods submarine groundwater discharge drive wetland metal exports. Extremely high Al, Fe, Mn concentrations (up to 40, 374, 8 mg L–1, respectively) were found shallow acidic groundwaters from the Tuckean Swamp, Australia. Significant correlations between radon (a natural tracer) metals surface waters revealed that loads driven primarily by discharge. Dissolved Mn, Al during 16-day flood triggered 213 mm rain event respectively 80, 35, 14% total water exports four months observations. Counter clockwise hysteresis was observed for Fe due delayed inputs. Groundwater-derived fluxes artificial drains 1 order magnitude higher than exports, which ...
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