Designing roads and carparks to collect and conserve water
- Use natural drainage swales instead of costly concrete drainage pipes in greenfield sites.
- Harvest rainwater from car parks by avoiding the use of kerbing and directing runoff into recharge zones. Recharge zones may be grassed or planted swales, permanent ponding basins or graded rock terracing.
- Design ground surfaces and paved areas to slope away from buildings and structures, this will enable water to run onto surrounding garden areas and recharge zones.