UK State-of-the-Art – Sewerage Rehabilitation

Abstract

The problems which led to concern over the state of sewers within the UK in the 1970s are described together with the strategies and methodologies which were developed to allow cost-effective rehabilitation. The current approach is illustrated by reference to practice in two regional water authorities - North West Water and Severn Trent Water. Considerable benefits have accrued from considering entire pipework systems and dealing concurrently with structural, hydraulic and water quality problems. Effort in the future will concentrate on refining the existing methodology and improving business management by developing better measures of levels of service and information systems