Sectional analysis of stormwater treatment performance of a constructed wetland

Mangangka, Isri R., Liu, An, Egodawatta, Prasanna, & Goonetilleke, Ashantha (2015) Sectional analysis of stormwater treatment performance of a constructed wetland. Ecological Engineering, 77, pp. 172-179.

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Constructed wetlands are among the most common Water Sensitive Urban Design (WSUD) measures for stormwater treatment. These systems have been extensively studied to understand their performance and influential treatment processes. Unfortunately, most past studies have been undertaken considering a wetland system as a lumped system with a primary focus on the reduction of the event mean concentration (EMC) values of specific pollutant species or total pollutant load removal. This research study adopted an innovative approach by partitioning the inflow runoff hydrograph and then investigating treatment performance in each partition and their relationships with a range of hydraulic factors. The study outcomes confirmed that influenced by rainfall characteristics, the constructed wetland displays different treatment characteristics for the initial and later sectors of the runoff hydrograph. The treatment of small rainfall events (<15 mm) is comparatively better at the beginning of runoff events while the trends in pollutant load reductions for large rainfall events (>15 mm) are generally lower at the beginning and gradually increase towards the end of rainfall events. This highlights the importance of ensuring that the inflow into a constructed wetland has low turbulence in order to achieve consistent treatment performance for both, small and large rainfall events.

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ID Code: 81971
Item Type: Journal Article
Refereed: Yes
Keywords: Constructed wetland, Stormwater treatment, Stormwater quality, Stormwater pollutant processes, Rainfall characteristics, Water Sensitive Urban Design
DOI: 10.1016/j.ecoleng.2015.01.028
ISSN: 0925-8574
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500) > Water Quality Engineering (090508)
Divisions: Current > Schools > School of Civil Engineering & Built Environment
Current > Schools > School of Earth, Environmental & Biological Sciences
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2015 Elsevier
Copyright Statement: This is the author’s version of a work that was accepted for publication in Ecological Engineering. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Ecological Engineering, [VOL 77, (2015)] DOI: 10.1016/j.ecoleng.2015.01.028
Deposited On: 23 Feb 2015 22:37
Last Modified: 02 Mar 2015 17:44

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