Best Practice for Sediment Management for Reservoirs and River Impoundments

Reference: 19/RG/06/5
ISBN: 978-1-84057-881-2
Published Date: 13/11/2019

Sediment management is important to water companies for operational reasons, but also to balance ecological concerns and allow regulatory compliance around these issues. Impounding structures, including those associated with water company activities, commonly alter sediment supply dynamics, which can lead to degradation of operational efficiency of assets. Sediment is a fundamental component of natural fluvial processes and impacts to sediment dynamics can have significant negative consequences for the geomorphology and ecology of a river and its anthropogenic uses.

The research has increased understanding of sediment management issues faced by the water industry and reviewed current UK guidance and regulations with respect to sediment management. Examples of good practice sediment management at impounding structures have been collated into  a comprehensive sediment management manual which consists of step-by-step guidance and 50 evidence sheets covering diverse topics from sourcing sediment for re-introduction to dealing with unforeseen problems.

Price: £250  

Surface Water Assets - A review of the extent of surface water assets in England and Wales

Reference: 19/RG/05/51
ISBN: 978-1-84057-876-8
Published Date: 26/09/2019

The natural drainage of the land has developed into a multitude of assets to facilitate drainage, with varying degrees of regulation and ownership. This multi-ownership of surface water assets makes the management of surface water a protracted and difficult process in resolving surface water problems. There is an emergent debate about how surface water drainage, highway drainage and other surface water assets should be managed to allow a holistic view of the system capacity and address the flooding/environmental risks arising from such systems. This report seeks to inform that debate through an initial quantification of the size, scale, condition and current cost of the asset base, as well as the risks, benefits and regulatory implications associated with any potential change to ownership.

Price: £19  

Intelligent Assets - Condition and Performance Monitoring Techniques

Reference: 18/RG/05/49
ISBN: 1 84057 850 5
Published Date: 09/05/2018

Monitoring of critical assets can provide an early warning of possible failure, allowing early intervention and avoiding or mitigating impacts on customer service. Various ‘Condition and Performance Monitoring Techniques’ (CPMT) exist for this purpose, such as vibration or acoustics measurement, as well as analytical techniques (e.g. processing data to identify trends or detect anomalies). There is a need within the water industry to better understand the CPMT options available and their potential benefits.

Alternative options for CPMT were identified and assessed through a review of published literature. Water companies and CPMT supplier companies were also surveyed on their experiences of CPMT, in order to understand the usage/availability of various types of CPMT, and the success of CPMT implementations.

A framework for CPMT selection was devised based on identifying priority assets where CPMT would be most likely to be beneficial, then shortlisting potential techniques for these assets, and finally evaluating the costs and benefits. The costs and benefits section of the framework is illustrated via generic cost-benefit assessments for a range of common water industry asset types, provided in spreadsheet format on a CD accompanying the project report.

The project included a number of studies to quantify the benefits of CPMT. Data suggest that in many cases there are indeed clear benefits (more than justifying the cost of the CPMT) but the conclusions that could be drawn were restricted by data quality and availability.

One of the outputs from this project was a generic cost-benefit assessment spreadsheet, which provides cost-benefit assessment calculations and realistic quantities relating to asset deterioration rates, asset failure/repair costs etc, for ten commonly used water industry asset types. This spreadsheet might be useful in gauging the potential benefits of CPMT; users can also refine the analysis inputs in order to better represent particular assets at their company.

This spreadsheet is included on the CD. Further explanation and guidance is included within the spreadsheet itself.

Price: £50  

Consistency of Reporting Performance Measures

Reference: 17/RG/04/5
ISBN: 1 84057 834 3
Published Date: 10/07/2017

Water companies have been working together, coordinated by Water UK and supported by Ofwat, to develop more consistent reporting methodologies for the measurement of leakage, supply interruptions and sewer flooding.

As part of this work Water UK requested UKWIR commission an independent review and challenge of the initial proposals, to provide assurance and to develop more detailed guidance.

UKWIR commissioned Atkins to carry out this review, working with company practitioner experts and a steering group including representation from companies, Ofwat,  the Environment Agency, the Consumer Council for Water and Water UK.

Ofwat has confirmed that the output of this project will not impact on PR14 PCs and ODIs. It is intended to form the basis of public reporting from 2020/21 and to inform the development of PR19 Business Plans, and the detailed reporting guidance documents are below.

This report can be downloaded free of charge by clicking here.

Price: £15  

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