Sectional analysis of the pollutant wash-off process based on runoff hydrograph

Alias, Noraliani, Liu, An, Egodawatta, Prasanna, & Goonetilleke, Ashantha (2014) Sectional analysis of the pollutant wash-off process based on runoff hydrograph. Journal of Environmental Management, 134, pp. 63-69.

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The validity of using rainfall characteristics as lumped parameters for investigating the pollutant wash-off process such as first flush occurrence is questionable. This research study introduces an innovative concept of using sector parameters to investigate the relationship between the pollutant wash-off process and different sectors of the runoff hydrograph and rainfall hyetograph. The research outcomes indicated that rainfall depth and rainfall intensity are two key rainfall characteristics which influence the wash-off process compared to the antecedent dry period. Additionally, the rainfall pattern also plays a critical role in the wash-off process and is independent of the catchment characteristics. The knowledge created through this research study provides the ability to select appropriate rainfall events for stormwater quality treatment design based on the required treatment outcomes such as the need to target different sectors of the runoff hydrograph or pollutant species. The study outcomes can also contribute to enhancing stormwater quality modelling and prediction in view of the fact that conventional approaches to stormwater quality estimation is primarily based on rainfall intensity rather than considering other rainfall parameters or solely based on stochastic approaches irrespective of the characteristics of the rainfall event.

Impact and interest:

4 citations in Scopus
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4 citations in Web of Science®

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ID Code: 68176
Item Type: Journal Article
Refereed: Yes
Additional URLs:
Keywords: Rainfall characteristics, Pollutant wash-off, First flush, Stormwater quality, Stormwater pollutant processes
DOI: 10.1016/j.jenvman.2013.12.034
ISSN: 0301-4797
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 2014 Elsevier Ltd.
Copyright Statement: NOTICE: this is the author’s version of a work that was accepted for publication in Journal of Environmental Management. 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 Journal of Environmental Management, [Volume 134, (15 February 2014)] DOI: 10.1016/j.jenvman.2013.12.034
Deposited On: 09 Mar 2014 22:56
Last Modified: 23 Mar 2016 15:45

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