Sustainable Urban Drainage Systems (SUDS) treatment train assessment tool

  • Jefferies C
  • Duffy A
  • Berwick N
 et al. 
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Abstract

This paper outlines a rationale and scoring system for the stormwater treatment train assessment tool (STTAT) which is a proposed regulatory tool for Sustainable Urban Drainage Systems (SUDS). STTAT provides guidance and regulatory consistency for developers about the requirements of planners and the Scottish Environment Protection Agency (SEPA). The tool balances the risks of pollution to the receiving water body with the treatment provided in a treatment train. It encourages developers to take SUDS into account early, avoiding any misunderstanding of SUDS requirements at the planning stage of a development. A pessimistic view on pollution risks has been adopted since there may be a change of land use on the development in the future. A realistic view has also been taken of maintenance issues and the 'survivability' of a SUDS component. The development of STTAT as a response to the requirements of the Water Framework Directive is explored, the individual scores being given in tabular format for receiving water and catchment risks. Treatment scores are proposed for single SUDS components as well as multiple components within treatment trains. STTAT has been tested on a range of sites, predominantly in Scotland where both development and receiving water information was known. The operational tool in use by SEPA is presented.

Author-supplied keywords

  • Environmental risk
  • Guidance
  • Regulation
  • Sustainable urban drainage
  • Treatment train

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Authors

  • C. Jefferies

  • A. Duffy

  • N. Berwick

  • N. McLean

  • A. Hemingway

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