South East Rivers Trust

SuDS can reduce flood risk and improve river water quality, but how?

SuDS replace hard, impermeable surfaces with features that help restore the natural water cycle.  Surface water runoff from roads and roofs can be diverted into areas where it can be absorbed or temporarily stored.  In the image below, rainwater from the roof has been diverted into a rain garden.  Most of the water will soak into the ground with rainwater only entering the drain once the ground is saturated.  Contaminants are filtered out as the water flows through the rain garden.

Here are examples of other SuDS features that can be installed within school grounds or at home to slow the flow of rain to the drain and reduce contaminants entering the river.


For more information about how SuDS work check out the SuDS in Sutton’s Schools World Water Day blog.