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Hydrochemistry of episodic drainage waters discharged from an acid sulfate soil affected catchment

Green, Rosalind; MacDonald, Bennett; Melville, Michael D; Waite, David

Description

The water quality of drainage discharged via pumping from an acid sulfate soil (ASS) affected catchment used for sugar cane farming is temporally very variable and is influenced by the various rain event magnitudes, their antecedents, and the particular phase of the discharge in any rain event. Rainfall episodes can cause substantial changes in acidity and dissolved metal concentrations in ASS drainage waters over very short time scales with minimum pH often reached within a few hours of...[Show more]

dc.contributor.authorGreen, Rosalind
dc.contributor.authorMacDonald, Bennett
dc.contributor.authorMelville, Michael D
dc.contributor.authorWaite, David
dc.date.accessioned2015-12-07T22:25:43Z
dc.identifier.issn0022-1694
dc.identifier.urihttp://hdl.handle.net/1885/21425
dc.description.abstractThe water quality of drainage discharged via pumping from an acid sulfate soil (ASS) affected catchment used for sugar cane farming is temporally very variable and is influenced by the various rain event magnitudes, their antecedents, and the particular phase of the discharge in any rain event. Rainfall episodes can cause substantial changes in acidity and dissolved metal concentrations in ASS drainage waters over very short time scales with minimum pH often reached within a few hours of initiation of the rainfall event. The initial increase in acidity and dissolved metals concentrations often observed can be attributed mainly to 'first flush' effects resulting from mobilization of salts present in the upper soil profile. During the middle of a large rainfall event dilution effects may result in a decrease in concentrations of dissolved species, but increases in acidity and dissolved metals (particularly aluminium) concentrations in the recession portion of the hydrograph often occur as small field drains discharge into main channels. These observations assist both in understanding of the hydrogeochemical processes leading to acid and metals release from acid sulfate soils affected catchments, and in developing appropriate strategies to treat contaminated discharge waters from such catchments.
dc.publisherElsevier
dc.sourceJournal of Hydrology
dc.subjectKeywords: Catchments; Discharge (fluid mechanics); Drainage; Impurities; Rain; Soils; Transport properties; Water quality; Acid sulfate soil (ASS); Acid sulfate soils; Acidification; Contaminant transport; Episodic events; Water resources; Catchments; Discharge (fl Acid sulfate soils; Acidification; Contaminant transport; Episodic events; Water quality
dc.titleHydrochemistry of episodic drainage waters discharged from an acid sulfate soil affected catchment
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume325
dc.date.issued2006
local.identifier.absfor040608 - Surfacewater Hydrology
local.identifier.absfor040202 - Inorganic Geochemistry
local.identifier.ariespublicationu3485190xPUB17
local.type.statusPublished Version
local.contributor.affiliationGreen, Rosalind, University of New South Wales
local.contributor.affiliationMacDonald, Bennett, College of Medicine, Biology and Environment, ANU
local.contributor.affiliationMelville, Michael D, University of New South Wales
local.contributor.affiliationWaite, David, University of New South Wales
local.bibliographicCitation.startpage356
local.bibliographicCitation.lastpage375
local.identifier.doi10.1016/j.jhydrol.2005.10.022
dc.date.updated2015-12-07T09:40:27Z
local.identifier.scopusID2-s2.0-33744926154
CollectionsANU Research Publications

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