Rainwater Harvesting Solves UK Shortage11/08/2010 |
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| The long dry spell experienced by much of southern England this summer accentuates the growing pressures on national water supplies, predicted to become much worse over the next few decades. Against this background, rainwater harvesting can potentially play a very important part in relieving stresses on mains water supplies, simply by substituting rainwater for mains-water for the non-wholesome applications that account for around 50% of all domestic water consumption, and more than 80% of consumption in most public buildings. |
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With much of the UK already experiencing a lower rainfall per head of population than many countries bordering the Mediterranean, the Environment Agency's own predictions suggest that climate change could reduce water availability by up to 15% by 2050, with the summer flow-rates of rivers reducing by as much as 80%. Emphasising the problem, even parts of the country recently afflicted by floods and enjoying a very wet summer, are still needing to impose hose-pipe bans this year.
Applied consistently to all new buildings over the next 40-years, and retrofitted where sensible to existing buildings, rainwater harvesting alone could help to offset most of the expected negative impact on water supplies of climate change.
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