The Site boundary includes land located within Flood Zone 1 as well as 2 and 3 - see plan above where flood zones 2 and 3 are shown in blue . The proposed housing on the site is to be located in Flood Zone 1 which is the area at lowest risk of flooding. As part of the design process, the impact of climate change will be reviewed to determine the extent of future flooding during the design life of the development. This will help to keep the proposed development within Flood Zone 1 (area with less than 1 in 1000 annual probability of flooding) and outside of areas with flood risk.
Sustainable Drainage Systems (SuDS) will be provided throughout the development following the principles of the four key pillars of good water management - water quality, water quantity, amenity, and biodiversity. SuDS will be designed to manage stormwater locally (as close its source as possible), including water storage in tree pits, permeable paving, rain gardens and swales. These will mimic natural drainage and encourage its infiltration, attenuation and passive treatment. All SuDS will be designed to cater for a 1 in 100 year storm event with an allowance of 45% for climate change.
Foul water from the development is to drain into the existing foul sewer network, for which there is sufficient capacity to accommodate the proposals subject to connection fees that the development will pay.
Examples of modern Sustainable Urban Drainage Systems (SuDS) that will be used in the development, including tree pits, gabion baskets and permeable paving/ditches, are shown below in the images.