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dc.contributor.authorNewton, Daviden_US
dc.contributor.authorJenkins, Grahamen_US
dc.contributor.authorYu, Bofuen_US
dc.date.accessioned2017-05-03T15:27:55Z
dc.date.available2017-05-03T15:27:55Z
dc.date.issued2007en_US
dc.date.modified2010-07-06T07:01:20Z
dc.identifier.issn0273-1223en_US
dc.identifier.doi10.2166/wst.2007.113en_AU
dc.identifier.urihttp://hdl.handle.net/10072/19104
dc.description.abstractObserved reductions in pollutant concentrations through stormwater treatment devices commonly display the characteristic form of exponential decay, in which the rate of decrease of pollutant concentration with distance is proportional to the concentration. The observation of an apparently irreducible or background pollutant concentration, C*, in many devices has led to development of the two-parameter "k-C*" model. It is known that this model is too simplistic because the parameters k and C* are not constant but can vary greatly with pollutant concentration and hydraulic conditions. This paper presents an alternative exponential decay model for filtration of particulate pollutants, which is based on simple mathematical descriptions of key removal processes. The model delivers a process-based method for estimating the exponential decay constant. Moreover, the need to specify a background concentration is eliminated. To test the theory, the model is applied to the removal of clay and silica particles from horizontal flow through an experimental gravel trench. Particle concentrations were measured at nine locations along a 7.2 m long flume. The model agrees very well with the observed change in suspended solids concentration for the two pollutant materials and the range of flow rates tested. A single model parameter, notionally representing the "stickiness" of pollutant particles, is required for different pollutant materials.en_US
dc.description.peerreviewedYesen_US
dc.description.publicationstatusYesen_AU
dc.languageEnglishen_US
dc.language.isoen_AU
dc.publisherIWA Publishingen_US
dc.publisher.placeUnited Kingdomen_US
dc.publisher.urihttp://www.iwaponline.com/wst/toc.htmen_AU
dc.relation.ispartofstudentpublicationNen_AU
dc.relation.ispartofpagefrom227en_US
dc.relation.ispartofpageto234en_US
dc.relation.ispartofissue4en_US
dc.relation.ispartofjournalWater Science & Technologyen_US
dc.relation.ispartofvolume55en_US
dc.rights.retentionYen_AU
dc.subject.fieldofresearchcode300199en_US
dc.titleA process-based method of estimating exponential decay parameters for particulate removal in a gravel trenchen_US
dc.typeJournal articleen_US
dc.type.descriptionC1 - Peer Reviewed (HERDC)en_US
dc.type.codeC - Journal Articlesen_US
gro.facultyGriffith Sciences, Griffith School of Engineeringen_US
gro.date.issued2007
gro.hasfulltextNo Full Text


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