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How does Tobermore Hydropave Permeable Paving reduce surface water run-off?

Permeable pavements mimic natural water behaviour of undeveloped sites by allowing rainfall to infiltrate through the joints in the paving.  Depending on the site conditions rain is allowed to either drain into the ground or attenuated and released slowly to secondary drainage systems. Typical flow rates for water exiting a permeable pavement are 2 to 7 l/s/ha (litres/second/hectare).

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