Risk prioritisation of stormwater pollutant sources

Lundy, Lian ORCID: https://orcid.org/0000-0003-1155-4132, Ellis, John Bryan and Revitt, D. Mike (2012) Risk prioritisation of stormwater pollutant sources. Water Research, 46 . pp. 6589-6600. ISSN 0043-1354 [Article] (doi:10.1016/j.watres.2011.10.039)

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Abstract

This paper describes the development of a pollutant risk prioritisation methodology for the comparative assessment of stormwater pollutants discharged from differing land use types and activities. Guidelines are presented which evaluate available data with respect to ‘likelihood of occurrence’ and ‘severity of impact’. The use of the developed approach is demonstrated through its application to total suspended solids, biochemical oxygen demand, lead and cadmium. The proposed benchmarking scheme represents a transparent and auditable mechanism to support the synthesis of data from a variety of sources and is sufficiently flexible to incorporate the use of chemical, physical and/or ecological data sets. Practitioners involved in developing and implementing pollutant mitigation programmes are assisted in two key ways. Firstly through enabling the risks to receiving waters from diffuse pollution on a source-by-source and/or pollutant-by-pollutant basis at a catchment scale to be comparatively assessed and prioritised. Secondly, the methodology informs the selection of appropriate diffuse pollution control strategies.

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