Attenuation Tanks and Flow Control

tanks320The problems of flash flooding are regularly highlighted in the media. The principle of controlling storm water on a large site is simple. The water needs to be stored somewhere and then discharged at a controlled rate to avoid overloading the receiving water course or drain.

There are two main ways of storing the water before discharge: crates or tanks. Each system has its advantages and disadvantages. This page will help you select the best solution for your application.

The purchase price of either system is roughly the same as each other. The difference comes in the design, installation and maintenance.

Crates offer the best ‘volume to space’ ratio. If there is a limited amount of space to install an attenuation system then the crate option can give you a greater volume.

Tank systems are less labour intensive to install and easier to maintain as access is simple, therefore less expensive overall.

Due to the maintenance issues of a crate system, the Klargester tank system is the preferred option. During either flood situations or normal day-to-day operation, rain water will always carry silt into an attenuation system. A tank has an access shaft therefore it is easier to remove the silt.

With the Klargester tank system it is possible to use either a number of small diameter tanks or larger diameter tanks, depending on invert levels, available space or ground conditions.

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