Attenuation & Stormwater management systems

An attenuation system offers a lasting remedy for mitigating the risk of flooding resulting from water runoff during extended periods of rainfall. These systems incorporate a flow control chamber designed to regulate the volume of water discharged into a nearby sewer system or watercourse, such as a river or reservoir.

Historically, attenuation have been positioned beneath car parks or within access roads in high-volume residential developments.

Advantages of the proposed storm drainage system encompass minimising disruptions and decreasing carbon footprints. Conversely, disadvantages entail higher initial investments and ongoing maintenance costs.

Unlike a soakaway system, underground floodways can be positioned much closer to a building. The critical consideration is ensuring that the building load or foundation load does not impact the tank. Ideally, if you were to draw a 45-degree angle from the foundation, that line should not intersect the system. However, this may vary depending on the depth of the tank. Nonetheless, they can be situated in proximity to the building.

To accurately size a stormwater attenuation or soakaway tank, specific information beyond volume is necessary.

Key factors include the tank’s dimensions – length, width, and height – which determine necessary components like base plates and ventilation services. Providing a drainage drawing offers a comprehensive understanding of the project, aiding in precise calculations and accurate pricing.

Additionally, knowing the tank’s location – whether under a park, driveway, or heavily trafficked area – helps design the appropriate plate system. If a drainage drawing isn’t available, providing the tank’s dimensions is crucial, though additional information may be required for detailed calculations.

To conclude

In summary, precise sizing requires detailed information on tank dimensions, location, and ideally, a drainage drawing to ensure an appropriate solution for stormwater management.