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Haarlemmermeerse Bos: Preventing Thermal Stratification and Blue Green Algae

Map view of Haarlemmermeerse Bos

Site Description:

Haarlemmermeerse Bosplas Lake is located within Haarlemmermeerse Bos, a parkland area known for its natural scenery, hiking trails and family suitable activities. The lake functions as a site for recreational water sports and leisure activities. At around 738m in length and averaging 11m deep (max depth approx. 21m), Haarlemmermeerse Bosplas Lake is deemed a medium-sized fresh waterbody.
The lake is managed by Hoogheemraadshap van Rijn land which manages water quality, promotes economic sustainability, and ensures water safety within the North and South provinces of Holland.

Aeration History:

In 1994, an aeration and mixing system was installed into the waterbody as a method for the prevention of thermal stratification and blue green algae blooms. However, it was observed that this system did not significantly reduce the occurrence of algal growth and prevent the stratification of the water body.

The outdated design and lack of functionality meant that at the end of the system’s operational life, ISS Flowthrough was approached to design, supply, and support the installation of a replacement system.


The Solution:

Aerial view of ISS-Flowthrough aeration system

An ISS-Flowthrough diffused aeration system with 7(no) lines of diffusers supplied with compressed air was developed for the lake.
Expert project management paired with a uniquely designed aeration system meant that ISS Flowthrough was able to provide a custom solution for the problems that the lake faced.

In cases such as these, where a pre-existing system already exists, the ISS Flowthrough team undertook careful considerations to provide the best possible integration with minimal disruption.

By assessing the existing infrastructure and tailoring our approach, ISS Flowthrough ensured that the solution not only addressed the specific water quality issues, but the project was efficiently managed.