Prediction of stormwater particle loads from impervious urban surfaces based on a rainfall detachment index

Article


Brodie, I. M.. 2007. "Prediction of stormwater particle loads from impervious urban surfaces based on a rainfall detachment index." Water Science and Technology. 55 (4), pp. 49-56. https://doi.org/10.2166/wst.2007.094
Article Title

Prediction of stormwater particle loads from impervious urban surfaces based on a rainfall detachment index

ERA Journal ID4696
Article CategoryArticle
Authors
AuthorBrodie, I. M.
EditorsDeletic, Ana and Fletcher, Tim
Journal TitleWater Science and Technology
Journal Citation55 (4), pp. 49-56
Number of Pages8
Year2007
PublisherIWA Publishing
Place of PublicationLondon, UK
ISSN0273-1223
1996-9732
Digital Object Identifier (DOI)https://doi.org/10.2166/wst.2007.094
Web Address (URL)http://www.iwaponline.com/wst/05504/0049/055040049.pdf
Abstract

This paper makes use of Non-Coarse Particle (NCP) data collected from three different impervious surfaces in Toowoomba, Australia. NCP is defined as suspended solids less than 500μm in size. NCP loads (in mg/m2) were derived for 24 storms from a galvanized iron roof, a concrete carpark and a bitumen road pavement. A scatter plot analysis was used to identify potential correlations between NCP loads and basic rainfall parameters such as rainfall depth and intensity. An exponential-type trend, consistent with many washoff models, was evident between load and average rainfall intensity for all surfaces. However, load data for some storms did not fit this general trend. Various indices, comprising different combinations of basic rainfall parameters, were evaluated as an alternative to rainfall intensity. A composite index, referred to as the Rainfall Detachment Index, was found to be better than average rainfall intensity in explaining a relationship between NCP load and storm rainfall characteristics. The selected rainfall index utilizes 6-minute rainfall intensities and is a variant of the well known Rainfall Erosivity Index (EI30) used for soil erosion estimation.

Keywordsurban runoff; stormwater loads; particle washoff; stormwater monitoring
ANZSRC Field of Research 2020370704. Surface water hydrology
400499. Chemical engineering not elsewhere classified
400513. Water resources engineering
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Byline AffiliationsAustralian Centre for Sustainable Catchments
Event7th International Conference on Urban Drainage Modelling & 4th International Conference on Water Sensitive Urban Design
ISBN9781843395911
Event Details
7th International Conference on Urban Drainage Modelling & 4th International Conference on Water Sensitive Urban Design
Parent
International Conference on Urban Drainage Modelling and International Conference on Water Sensitive Urban Design
Delivery
In person
Event Date
02 to end of 07 Apr 2006
Event Location
Melbourne, Australia
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