Proceedings

Achieving Better Bathing Waters Through a Truly Integrated Multi-Catchment Approach in Barry, South Wales

Jones, J.1 and Barnock, N.2, 1JRJ Consulting, 2Metoc, UK

(free)

The study of the Barry Bathing Waters began in 2002 and has continued to date. The study area
extends from the Western Valleys in the east to Aberthaw in the west, a length of over 40km of
coastline. Initially the Unsatisfactory Combined Sewer Overflows (CSOs) discharging to the receiving
waters were subject to a 3-spill driver. This driver would give overly conservative designs and not
account for the comparative volumes of discharges and their proximity to the bathing waters.
Due to the complexity of the discharges a system of integrated sewerage, river and coastal models
was developed to determine impacts on the Bathing Waters.

The net result has yielded a risk based approach which integrates all of the catchments to deliver the
most cost effective and environmentally beneficial solution.

The paper will illustrate the many novel techniques developed in this project, that led to its IWO
Award for Innovation, and the unique partnering arrangements between the regulator, Water
Company, designers and contractors.

This paper is the combination of a great deal of work from many different people and different
organisations. We acknowledge all of this excellent, often challenging, work.

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