Tag Archives: Thames

Thames tidal flood defence inspection under way

27 May 2015: ENDS journal reports that “The Environment Agency (EA) has started detailed engineering and structural investigations into the condition of tidal flood defences in London and the Thames estuary.” The work is being carried out as part of the Environment Agency’s (EA) ten-year Thames Estuary Asset Management programme to refurbish and replace tidal flood defences in London and the Thames estuary (more info on TEAM2100 here), and the agency recently awarded the 10-year refurbishment deal to Balfour Beatty to run the project which is worth £250 million.

A great piece in The Guardian earlier this year on the Thames Barrier asks how safe is London from another major flood?

Posted in News | Tagged , | Leave a comment

Thames Tideway Tunnel Energy and Carbon Footprint

April 2013: Thames Water recently submitted its 50,000 page (!) planning application for the development of the Thames Tideway Tunnel.  It’s not surprisingly a big project …requiring the construction of a 15 mile tunnel to run 75 metres beneath the Thames riverbed through central London and would capture storm sewage from overflow points along the river. An online video on the project’s website can be viewed here.

The Tunnel has been designated a Nationally Significant Infrastructure Project (NSIP)  and as such its application must be submitted to the National Infrastructure Planning Inspectorate. And it is on their website that an Energy and Carbon Footprint Report for the project can be found ( here – and directly downloadable here).

This report sets out an energy and carbon footprint assessment for the Thames Tideway Tunnel considering the CO2 equivalent emissions (CO2e) for both the construction and operation of the tunnel. The results are presented within Section 5 of the report, which provides details on the CO2e associated with construction materials, transport and logistics, worksite construction activities and operational energy demand. The assumptions which underpin the assessment, and the raw data which informs it, is also provided within the appendices of the report.

The report sets out that the total carbon footprint, in the decarbonised scenario, of some 840,000 tCO2e (tonnes of carbon dioxide equivalent)the principal impact from the project is the GHG emissions caused by construction of the infrastructure, in particular embodied carbon in materials, being approximately 84% of the total emissions, with emissions from construction plant and machinery (construction worksite activities eg tunnel boring and emissions from plant and machinery) being around 10%of the total emissions. Emissions during the 120 year operational life of the tunnel represent approximately 2.5% of the total GHG emissions. The transport of excavated material and construction materials represents approximately 3.5% of the total carbon footprint of the project.” Much is placed on overall future electricity grid decarbonisation to help reduce the CO2 footprint of the project.

Posted in Library, News | Tagged , , | Leave a comment

Thames Barrier engineer says second defence needed

January 2013: BBC news story “A civil engineer who was part of the project management team which completed the Thames Barrier has said a new river defence should be planned urgently. Dr Richard Bloore said the south-east London barrier, opened in 1982, was not designed to factor in global warming. A study by the Environment Agency says with some modifications the barrier could continue to provide protection for the rest of the century.” Read the full article here.

Posted in News | Tagged , | Leave a comment

London’s first hydroelectric turbine

November 2012: The National Trust started London’s first ever Archimedes Screw hydroelectric turbine at Morden Hall Park in south west London  sited on the river Wandle. Local MP for Kingston and Surbiton, Ed Davey – who is handily also the Secretary of State at DECC – was in attendance at the launch event. The National Trust’s news release adds that the “Archimedes Screw turbine will generate enough electricity to power the Park’s new award-winning visitor centre.  By acting like a modern waterwheel it will harness the power of the river to generate electricity.  It is estimated that it will generate 59,000 kWh a year – enough for about 16 average households.” The 8.5kWe turbine had a high capital cost – reported at £350,000  fully installed – and much debate about how this cost should be viewed is presented on the following Guardian article (ie high capital cost, but very low ongoing costs for the generator over its life span).

Further details on the project are posted on the Morden Hall Park blog and information on the Archimedes Screw itself on the website of the technology provider for this installation, Halliday’s Hydropower.

A further hydropower project, also using an Archimedes Screw, is planned in London at Teddington Weir, further information for which is at project website  Ham Hydro (and in an earlier post here).

Posted in News | Tagged , , , | Leave a comment

Tidal energy trial in Thames

19 May 2011: A tidal turbine is being installed in the River Thames alongside World War II ship HQS Wellington in central London. If the trial proves successful and does not adversely affect the environment, hundreds of turbines could be installed between Kent and London. Further details are on the developer’s, Nautricity, website.

Posted in News, Renewable Energy | Tagged , , | Leave a comment