What is a retarding basin?

 

What is a retarding basin?

A retarding basin is a basin built in connection with large rainwater drainage systems. The purpose is to delay the rainwater so that either a smaller amount of water is transported to the recipient or to the underlying pipework systems per time unit, or that you get the option to continue with a smaller size of pipe.

Retarding basins can be designed as closed or open basins. Closed basins can be made from concrete or plastic cartridges. If the basins are made of concrete, they will generally be more expensive and the biological cleaning effect will not occur. If, however, the retarding basins are made from BIO-BLOK® elements, there will be a biological cleaning effect because of the large surface on which cleaning microorganisms can settle. For more details, see the section Environmental benefits » Read more

Open retarding basins are normally made as soakaways and this type of basin is normally the cheapest to make. Soakaways can be formed with the standing water so that they become part of the natural landscape. At the same time, effective oil and catch pits are established and, if needed, the basins can be combined with green plantations which are for breaking down the pollution which can appear with the surface water.

BIO-BLOK® elements can be integrated well here since the only limit is your imagination.

Why work against nature when you can work with nature?

To read more, click on the icons below to download the following brochures:


Example of an integrated rainwater basin/wetland:

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(only in Danish)

Example of a combined seepage system and retarding basin:

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(only in Danish)

Proposal for an open rainwater basin:

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(only in Danish)