At present, the site is comprised of undeveloped, greenfield land with no impermeable surfaces and therefore no areas which are positively drained (i.e., by conventional underground pipes, gullies, manholes etc.).
Saturated ground and pooling were observed across the east of the site where the terrain was observed to slope down toward the east. The engineered Sustainable Urban Drainage strategy will seek to resolve this to the benefits of the residents living along the Street.
The most effective approach to incorporating SuDS into the development is to plan for and include them from the outset, and ensure that SuDS and blue-green corridors for the transfer of surface water are represented in the initial masterplan development. There are good opportunities to do this at the site, due to the relatively low density of housing proposed, the large amount of amenity and open-space (which is highly suitable for ‘doubling up’ as SuDS storage), and the good drainage falls across both development areas.
No foul drainage is currently present at the site. The site will therefore be served by new foul drainage infrastructure, developed from first principles. Southern Water have confirmed that there is adequate capacity in the local sewerage network to accommodate a foul flow in this location.