"Topmix permeable" Could Save Lives During Floods By Soaking Up Huge Amounts of Excess Water
The threat of flash floods and storms often sends city planners into a panic when the bad weather season is on the horizon. The flat, non permeable surfaces that coat most of our towns and cities make it very difficult to drain off large amounts of water in a short space of time.
The cost of resulting damage can easily run into the billions of dollars depending on the severity of the storm. To this end, Tarmac a leading manufacturer of concrete and asphalt products in the UK has created a super absorbent road surface that can guzzle up to 880 gallons (4000 liters) of water in the space of a minute and redirect it to the groundwater drainage system.
Known as “Topmix permeable“ the road surface material has an average permeability rate of 158.5 gallons (600 liters) per minute, per m2; although for the moment it won’t work in freezing conditions.
Using such a material in our cities could save lives by reducing flooding on roads and sidewalks. During the 2007 floods in the UK, over two thirds of homes affected by flooding were engulfed by water running off pavements or overflowing from drainage systems.