The main objective for the project was to demonstrate measures to attenuate water flow within the development, slowing down the rate of runoff and storing water in high rainfall events. This prevents additional flood risks occurring elsewhere. In order to achieve this the scheme incorporates the following innovative SuDs measures:
1. Permeable Paving – The paving within the adoptable roads and some of the car parking areas is of permeable construction. Gaps between the paving allow water to enter porous storage zones.
2. Detention Basins – Sculpted depressions in open spaces help to slow down the runoff rate and store water on a temporary short-term basis.
3. Swales – Most of the excess water from the site will be fed into a series of shallow creeks further slowing the flow of water and starting the water treatment process.
4. Green Roof – The site includes a small demonstration green sedum roof to reduce water runoff and carry out some natural treatment of rainwater.
The scheme also includes two dwellings that have been designed with techniques for flood resilience and to minimise water damage in the event of a flood, therefore reducing the damage costs. Flood proofing measures include:
· Identifying the potential sources and routes of flooding
· Elevation and contouring
· Dry proofing
· Wet proofing
In addition, the project tackles wider sustainability issues including water efficiency and use of rainwater by residents. All the properties have water butts front and rear. The water gathered from these devices can be reused for gardens and other uses.