Quantifying first flush loadings of stormwater runoff from residential catchment

M. F. Chow, Z. Yusop

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Stormwater runoff is the main contributor to non-point source (NPS) pollution in urban areas. This issue is extremely important in tropical environment because of its high intensity and frequent storms. The objective of this study was to investigate the fraction of pollutant mass loading transported by the first 30% of runoff volume (FF30). Stormwater samples and flow rate data were manually collected from a residential catchment during 18 storm events, with mostly return period less than 3 month (33 mm/hr for a 1-hour duration storm). The mean of FF30 values for 5-day biochemical oxygen demand (BOD5), chemical oxygen demand (COD), total suspended solids (TSS), total phosphorus (TP), ammonia nitrogen (NH3-N) and oil and grease (O&G) are 44%, 45%, 46%, 44%, 52% and 40%, respectively. Correlation analysis showed that antecedent dry day was likely to result in a greater pollutant loading transported in the early 30% of runoff volume. Intercepting the first 30% of runoff volume is able to remove an average of 45% of total pollutant loading during the frequent storms occurred in tropical residential catchment.

Original languageEnglish
Title of host publicationProceedings of the 34th Hydrology and Water Resources Symposium, HWRS 2012
PublisherEngineers Australia
Pages1579-1585
Number of pages7
ISBN (Electronic)9781922107626
Publication statusPublished - 01 Jan 2012
Event34th Hydrology and Water Resources Symposium, HWRS 2012 - Sydney, Australia
Duration: 19 Nov 201222 Nov 2012

Publication series

NameProceedings of the 34th Hydrology and Water Resources Symposium, HWRS 2012

Other

Other34th Hydrology and Water Resources Symposium, HWRS 2012
CountryAustralia
CitySydney
Period19/11/1222/11/12

All Science Journal Classification (ASJC) codes

  • Ocean Engineering
  • Water Science and Technology
  • Oceanography

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  • Cite this

    Chow, M. F., & Yusop, Z. (2012). Quantifying first flush loadings of stormwater runoff from residential catchment. In Proceedings of the 34th Hydrology and Water Resources Symposium, HWRS 2012 (pp. 1579-1585). (Proceedings of the 34th Hydrology and Water Resources Symposium, HWRS 2012). Engineers Australia.