Managing Water and Flood Risk
Sustainable drainage that reduces flood risk
Site Assessment
The site has been assessed by independent drainage engineers following national guidelines. Detailed flood modelling has been carried out for the watercourses along the northern and southern boundaries.
Flood Risk – Key Findings
Most of the site is at low risk of flooding
Only small areas along the northern boundary (next to Hookwood Common Brook) and the south-western edge are at higher risk
All homes will be built in the lowest risk category
Sustainable Drainage
New development creates hard surfaces where rain cannot soak into the ground. Our Sustainable Drainage Systems (SuDS) strategy ensures surface water is properly managed, protecting both the site and surrounding areas:
Retention Basins
Landscaped areas that temporarily hold water during heavy rain before releasing it slowly.
Swales
Shallow grass channels that collect and filter rainwater naturally.
Permeable Paving
On driveways and parking areas, allowing water to soak through into the ground.
Reducing Flood Risk Downstream
The drainage system is designed to release water more slowly than the site at present:
Storm Event
Current Runoff
After Development
1 in 100 year storm
159 litres/second
26.5 litres/second
83% reduction – less water being released during a 1 in 100 years storm.
Climate Change Allowance
+40%
rainfall capacity
The drainage system is designed to handle rainfall 40% heavier than today’s storms – the level recommended by the Environment Agency.
Continue the Consultation
Learn more about the other aspects of our proposals.
Vistry Homes Hookwood
Public consultation website for Vistry Home’s reserved matters application for Land West of Reigate Road, Hookwood.
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