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improvements
Ofwat recently published new targets for water
companies to help customers save more than 23
million litres of water a day (Ml/d). The largest
UK water company tasked Atkins with delivering
schemes in some of the most commercially
important areas of london that contribute to
reducing leakage from their network.
network proving, and site anomaly resolution,
TOM
Atkins was commissioned by Thames Water to design reconfigured the network, provided construction SMUlDErS
a Pressure Managed Area (PMA) in the West End support and calculated the leakage savings. Atkins
Senior
of London to reduce pressure fluctuations in the successfully developed an approach that provided Engineer
network and ultimately deliver estimated leakage effective management and mitigated risks in working DISTrIBUTIOn
savings of six million litres of water per day. The in these commercially significant areas.
nETWOrKS
Maiden Lane South PMA supplies over 22,000
T: 07834 506738
properties through 140km of mains in a key part of A comprehensive team of experts were provided
tom.smulders@atkinsglobal.com
central London that includes Leicester Square, Covent in leakage management and hydraulic modelling
Garden, Soho, Holborn and St Pancras. coupled with experience in working on both trunk Above: One of three
mains and distribution networks. Partnership working
600mm control valves that
manage the flow and pressure
“ Working with Thames Water’s
with Thames Water ensured successful delivery and in the area.
Victorian age water network in the
the team are working on similar schemes in other
London water supply zones that will provide further
heart of London was always going
benefits to Thames Water in meeting their leakage
to be challenging. I’m extremely
reduction targets.
happy with what we have been
Commissioning of the PMA marks the final phase of
able to achieve.”
a four year project. n
Nick Kelly, Thames Water, Project Manager
Atkins designed the area to be supplied through
three bespoke 600mm control valves that are linked
remotely to Thames Water’s control room and can
operate automatically or manually. These valves TOTAl hEAD BEFOrE COMMISSIOnInG OF PMA
were required to provide operational flexibility and
can deliver a target pressure to a pre-determined
profile. In addition, all three valves can operate in
Duty, Assist or Standby modes and continuously
TOTAl hEAD AFTEr COMMISSIOnInG OF PMA
monitor the demand and pressures in the area and
react accordingly.
Efficient pressure management has been proven
to be a highly cost effective method for leakage
MAIDEn lAnD SOUTh PMA
reduction, demand management and reducing the
recurrence of bursts. Reducing leakage provides
further environmental benefits by utilising existing
water resources more efficiently and extending the
operational life of existing water supply assets.
In addition to carrying out the conceptual design of Right: Measurements of
the PMA using hydraulic models, the multidisciplinary
total head before and after
commissioning of the pressure
team carried out the design of the control philosophy,
management scheme.
solutions | Autumn 2008
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