Water Mains & Services & Leakage
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Natural Rate of Rise in Leakage
Price: £200
Ref: 05/WM/08/33
ISBN: 1 84057 393 7
The natural rate of rise in leakage relates to the underlying rate at which leakage increases within a system. NRR is essential for determining the intensity of active leakage control that is required to maintain leakage at a specific level, and the range of methodologies for assessing leakage/cost relationships outlined in the Tripartite Report all rely on a robust assessment of NRR. As an indicator of asset condition, NRR is also central to mains replacement strategy.
This report examines and compares the theoretical and empirical attributes of the alternative NRR assessment methods, the 'burst frequency' and 'nightline' approaches, and provides a set of procedures which facilitate the derivation of consistent NRR assessments suitable for (i) area-level leakage management budgeting; (ii) targeting mains renewal; (iii) targeting active leakage control resources at DMA-level; and (iv) deriving leakage control cost curves for determining economic levels of leakage.
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Leakage Estimation from Night Flow Analysis
99/WM/08/21 - ISBN: 1 84057 158 6Existing methods for providing leakage estimates for reporting purposes, using data from continuously monitored areas are reviewed. Analysis concentrated on night use allowances and 15 minutes flow sampling intervals using s... More...
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The Natural Rate of Rise in Leakage
99/WM/08/22 - ISBN: 1 84057 159 4This research examines the theoretical and empirical determinants of the natural rate of rise in leakage (NRR) over time, in order to advance the development of an 'NRR Equation' which can be used to produce reliable estimate... More...
Price: £100
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A Manual of DMA Practice
99/WM/08/23 - ISBN: 1 84057 160 8The manual provides guidance to staff engaged in managing district meter areas (DMAs). It guides the practitioner through the stages of : 1. setting up and maintaining districts, 2 monitoring leakage, 3 se... More...
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The Environmental and Social Value of Leakage Reduction
99/WM/08/24 - ISBN: 1 84057 161 6This research develops a methodology for incorporating environmental and social costs and benefits into the evaluation of water management options. Approaches to valuing changes in external costs are developed. In addition, ... More...
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Performance of Electrofusion Joints for PE Pipes
99/WM/02/10 - ISBN: 1 84057 153 5The large number of service failures of electrofusion joints remains of prime concern to UK water industry. This investigation combines the findings of two year's work looking at the effects of site conditions, joint preparat... More...
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