Commonality of rainfall variables influencing suspended solids concentrations in storm runoff from three different urban impervious surfaces

I M Brodie; Peter K Dunn

doi:10.1016/j.jhydrol.2010.04.008

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Commonality of rainfall variables influencing suspended solids concentrations in storm runoff from three different urban impervious surfaces

Journal article

Open access

Peer reviewed

Commonality of rainfall variables influencing suspended solids concentrations in storm runoff from three different urban impervious surfaces

I M Brodie and Peter K Dunn

Journal of Hydrology, Vol.387(3-4), pp.202-211

2010

DOI: https://doi.org/10.1016/j.jhydrol.2010.04.008

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Abstract

stormwater

urban runoff

suspended solids

regression analysis

low impact development

Finding a common set of rainfall variables to explain the concentration of suspended solids in runoff from typical urban impervious surfaces has many applications in stormwater planning. This paper describes a statistical process to identify key explanatory variables to Non-Coarse Particle (suspended solids<500 μm size) event mean concentrations measured from road, carpark and roof surfaces located in Toowoomba, Australia. The dominant variables for all surfaces were rainfall depth and peak 6-minute rainfall intensity. Storm duration, defined as the time period when rainfall intensity exceeds 0.25 mm/hr and antecedent storm rainfall were also important predictors, but was less dominant. The regression model fitted to non-coarse particle concentration across all surfaces was proportional to rainfall depth raised to a negative power and peak 6-minute rainfall intensity raised to a positive power; the proportionality constant varies by surface type. The form of this common model has a physical basis and is analogous to the Modified Universal Soil Loss equation widely used for soil loss estimation for non-urban areas.

Details

Title: Commonality of rainfall variables influencing suspended solids concentrations in storm runoff from three different urban impervious surfaces
Authors: I M Brodie (Author) - University of Southern Queensland
Peter K Dunn (Author) - University of the Sunshine Coast - Faculty of Science, Health and Education
Publication details: Journal of Hydrology, Vol.387(3-4), pp.202-211
Publisher: Elsevier BV
Date published: 2010
DOI: 10.1016/j.jhydrol.2010.04.008
ISSN: 0022-1694
Copyright note: Copyright © 2010. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Organisation Unit: University of the Sunshine Coast, Queensland; School of Health and Sport Sciences - Legacy; School of Science, Technology and Engineering
Language: English
Record Identifier: 99449897202621
Output Type: Journal article