SuDS, or Sustainable Drainage Systems, primarily function to manage surface water run-off effectively and sustainably.
According to the provided reference, the core function of SuDS involves several key actions to handle surface water:
- Managing surface water run-off: This is the overarching goal, controlling how water flows over surfaces during and after rainfall.
- Treating it as near to source as possible: Addressing the water quality issue at the point where run-off is generated, rather than further downstream.
- Slowing down the rate of discharge: Reducing the speed at which water enters drainage systems or water bodies, mitigating flood risk.
- Treating water sustainably: Utilizing natural processes within the system to clean the water before it is released.
- Releasing it in a controlled way: Managing the outflow of water to prevent sudden surges and maintain ecological balance.
- Directing water to watercourses or groundwater: Ensuring the managed and treated water is safely returned to the natural water cycle.
These systems are designed to mimic natural drainage processes, contrasting with traditional piped systems that quickly channel water away.
Key Aspects of SuDS Function:
| Function Aspect | Description |
|---|---|
| Run-off Management | Controls the volume and flow of surface water. |
| Source Treatment | Cleans water close to where it lands, reducing pollution spread. |
| Flow Attenuation | Slows down water discharge rate, reducing flood peaks. |
| Water Quality Improvement | Filters and treats water using sustainable methods. |
| Controlled Release | Manages how water re-enters rivers, streams, or underground aquifers. |
It is important to note that since 2006, SuDS have become a legal requirement for most new developments, highlighting their significance in modern construction and environmental management practices. Their function is crucial for urban resilience against flooding and for protecting water quality.
