Green infrastructure interventions for drainage

Development of land can affect the natural drainage system by reducing the amount of water infiltrating the ground. Roofs, driveways, pavements, parking bays and a range of other surfaces can radically alter the natural drainage pattern of rain or storm water. Consideration should therefore be given to green infrastructure interventions which can help to reduce both storm water volume and the rate of run-off entering the drainage system. Green infrastructure interventions include, but are not limited to: • green/living roofs; • green/living walls; • rainwater capture/harvesting; • ponds/basins; or • swales.