Tuesday, November 17th, 2015
Experts have raised concern that the City of London is at a high risk of flooding if homeowners keep paving over their gardens. A recent study has revealed that unless London homeowners stop paving over their gardens, the city is at high risk of flooding, even from a relatively light rainfall. Due to London’s population reaching a massive 11 million, an increase in cars within the capital and weather patterns becoming more extreme, City Hall, The Environment Agency and Thames Water backed a review into whether the London’s harsh restrictions and sky high parking space costs are contributing towards more front gardens being changed into parking spaces. This review outlined areas where the sewage and drainage capacity may not be able to manage the increasing water flows by 2050 if no preventative action is taken, as well as revealing that over the last 40 years, over 17 per cent of permeable ground surface in London has been lost. As a result of these environmental dangers, Boris Johnson has published the first London Sustainable Drainage Action Plan to ensure the city’s 150 year old drainage system does not overflow. The plan aims to reduce the amount of water flowing into the sewer network by a quarter by 2040 by carrying out a series of measures. Click here for further information.
Friday, November 13th, 2015
Clever Concrete Diverts Excess Surface Water Specially designed permeable concrete allows water to flow down safely into the ground beneath providing a possible solution to flash flooding. An enhanced type of concrete has been revealed which appears to make hundreds of gallons of water disappear before your very eyes. No, this is not an elaborate magic trick or some sort of an illusion, but a specially designed product which can absorb up to 880 gallons of water in 60 seconds. Soak Or Resist? Many types of concrete are treated with a liquid water repellent in order to prevent water from leaking into the finished surfaces of the interior of a building such as your home. However, this enhanced type of concrete differs, as it has been purposefully created in order to soak up and divert excess water rather than resist it. This type of thirsty concrete is not a new product, in fact it has been in use for around 60 years. However, advancements in concrete technology have now enabled it to be used as a top surface capable of withstanding the weight of vehicles, therefore making an appropriate material with which to build carparks, driveways, streets or other areas where surface water can be an issue. How Does Concrete Drink Water? The concrete is made from a permeable top layer of large pebbles, allowing water to speedily flow through it freely and follow a course through a further section of loose aggregate before eventually reaching a level of rubble beneath. Drainage channels which are integrated into the rubble serve to disperse of the water and therefore increases the amount of liquid that the concrete can appear to cope with. Thirsty Concrete Assists Environment With heavy rainfall and archaic sewers in the UK, we