Flood Relief & Rainwater Attenuation Tanks

Rainwater attenuation tanks & storm flood relief tanks can be used to manage and control the flow of stormwater to reduce the risk of localised flooding.  

What Is Rainwater & Stormwater Attenuation?

Rainwater or stormwater attenuation systems work by storing rainwater from heavy downpours and stored and then releasing them slowly into their drainage pathways.  Rainwater attenuation is one of the key features of sustainable drainage systems (SuDS) in helping prevent flooding.  Attenuation systems temporarily store rainwater during a heavy spell of rainfall to hold it back before being released into the drainage system, slowing runoff to alleviate flood risk.

As new houses are built on new sites, soil naturally soaks up the rainfall that lands on it. When a new building site or area is created there is nowhere for that rainfall to go except to the sewer or storm drain.  With more houses and commercial buildings than ever before, the drainage network, which was designed many years ago in some cases, becomes overloaded and floods as it and cannot cope with the additional water.  Controlling the flow of stormwater also helps prevent erosion caused by excessive runoff. This is especially important in urban areas.

Installing an attenuation tank helps improve the quality of water that enters natural bodies of water by reducing the risk of contamination and protects aquatic ecosystems. The attenuation tank allows sediments to settle and remove any pollutants from stormwater before being released.  When installing any attenuation system it is important to consider the design, specification, installation and maintenance of the system to ensure it is fit for purpose and delivers the intended benefits.

Do Stormwater Relief Tanks Work Above Ground?

Above-ground plastic rainwater harvesting tanks can be the easiest to install and interlinked to volumes of over 100,000 litres.  They can temporarily store water after heavy rainfall events, preventing the rapid and uncontrolled flow of stormwater flooding downstream drainage systems and natural bodies of water.

What Are Stormwater Attenuation Crates?

Soakaway crates, also known as attenuation crates, can be used to help control the level of surface water in both commercial and domestic projects. Installing a drainage crate is particularly useful in areas that are prone to flooding or heavy rainfall.  Installed underground, these cellular, eggbox style crates temporarily store an enormous volume of water in their voids and then allow it to slowly seep into the soil once collected and disperse naturally into the groundwater.  They are designed to be very strong but also lightweight.   

Enduramaxx Tanks For Attenuation

Enduramaxx rainwater harvesting systems can be used for above and below ground installations to hold water until it is actively released.  A wide range of above ground rainwater harvesting storage tanks are available from 150L up to 30,000 litres and are UV stabilized for many years of outside use. These rainwater collection tanks are manufactured in the UK, and are rotationally moulded for strength and durability.  

For more details and pricing on rainwater tanks, can be used as attenuation tanks – please get in touch today on 01778 562810.

Visit Our Blog

Related Posts

What To Plan For When Installing A Rainwater Tank In The UK

Rainwater harvesting is the collection and storage of rain for a variety of uses. There are a...

Is It Legal To Collect Rainwater In The UK?

Harvesting rainwater can help to reduce erosion and flooding, slash your overheads, improve plant...