Report No FR0204
EVALUATION OF INTERIM WATER QUALITY PLANNING PROCEDURES: THE LITTLEBOROUGH CASE STUDY
These objectives were to be achieved by the intensive monitoring of a sewer and river system, before and after the implementation of a sewerage rehabilitation scheme involving the construction of a CSO with on-line storage.
The traditional approach to the design of CSO has been based upon sewerage orientated hydraulic criteria alone. This approach takes no account of the impact on the receiving environment. A new approach, developed under the UPM programme, aims to provide tools to assist engineers and water quality planners to design CSOs to take account of the environmental impact of spills and enable river quality objectives to be met. An interim water quality planning procedure has been devised which incorporates the use of SRM-Il, TSR and WASSP together with a river impact procedure called CARP. The effectiveness of this approach needs to be investigated by evaluating the performance of a sewerage rehabilitation scheme which involved their application at the design stage.
The results of the field monitoring of the CSO and river showed that:
V RESUME OF CONTENTS
Section 1 outlines the background to the development of the UPM procedures and the sewerage rehabilitation design at Littleborough. The field site and data collection programme are discussed in Section 2. Data collation and analysis are considered in Section 3. Results, conclusions and recommendations are presented in Sections 4, 5 and 6 respectively. The Appendices contain a summary of the data collection and analysis.
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