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Performance characterisation of a constructed wetland

Mangangka, Isri R., Egodawatta, Prasanna, Parker, Nathaniel, Gardner, Ted, & Goonetilleke, Ashantha (2013) Performance characterisation of a constructed wetland. Water Science and Technology, 68(10), pp. 2195-2201.

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Abstract

Performance of a constructed wetland is commonly reported as variable due to the site specific nature of influential factors. This paper discusses outcomes from an in-depth study which characterised treatment performance of a wetland based on the variation in runoff regime. The study included a comprehensive field monitoring of a well established constructed wetland in Gold Coast, Australia. Samples collected at the inlet and outlet was tested for Total Suspended Solids (TSS), Total Nitrogen (TN) and Total Phosphorus (TP). Pollutant concentrations in the outflow were found to be consistent irrespective of the variation in inflow water quality. The analysis revealed two different treatment characteristics for events with different rainfall depths. TSS and TN load reduction is strongly influenced by hydraulic retention time where performance is higher for rainfall events below the design event. For small events, treatment performance is higher at the beginning of the event and gradually decreased during the course of the event. For large events, the treatment performance is comparatively poor at the beginning and improved during the course of the event. The analysis also confirmed the variable treatment trends for different pollutant types.

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ID Code: 55223
Item Type: Journal Article
Keywords: constructed wetlands, multivariate analysis, stormwater quality, stormwater treatment, Water Sensitive Urban Design, WSUD
DOI: 10.2166/wst.2013.476
ISSN: 0273-1223
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500) > Water Quality Engineering (090508)
Divisions: Current > Schools > School of Earth, Environmental & Biological Sciences
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2013 International Water Association
Deposited On: 03 Dec 2012 09:00
Last Modified: 13 Nov 2014 10:19

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