Please use the following SuDS design flow, with associated bullet points, as checklist when designing a SuDS scheme in Kent.
Step 1 – Baseline Assessment
- Detailed site survey
- Ground investigations (BRE 365 tests, groundwater mapping)
- Flood risk and overland flow assessment
Step 2 – Concept Design
- Apply runoff hierarchy
- Map opportunities for infiltration
- Identify locations for blue–green infrastructure
Step 3 – Detailed Hydraulic Design
- Use the upper-end EA climate allowances
- Design attenuation and conveyance for extreme events
- Ensure exceedance routes avoid buildings and critical infrastructure
Step 4 – Water Quality Treatment
- Apply SuDS treatment stages appropriate to risk
- Provide evidence through CIRIA SuDS Manual methodologies
Step 5 – Landscape & Biodiversity Integration
- Incorporate natural habitats, wetland shelves, biodiverse grassland
- Ensure public amenity value
Step 6 – Maintenance & Adoption Strategy
- Provide lifetime maintenance plan
- Identify management body and funding mechanism
- Demonstrate safe access for maintenance