IMPAKT!

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The cross-border watercourses, Dommel and Warmbeek Tongelreep pose a major challenge in terms of water quality. One big stumbling block is the current management of the wastewater chains: during rainy periods, contaminated water overflows from the sewage systems into watercourses and a classic wastewater purification plant does not always work optimally. Serious disruption of the oxygen content and ammonia intoxication in stream courses therefore has a considerable impact on fauna and flora. The nearby industrial sites also need to be considered, as environmentally harmful substances can end up in the watercourses. IMPAKT! Is working on an innovative approach for improving the water quality through hydrobiological research into fish, macro fauna and water plants. It also aims to gain insight into the various overflows, discharge points and watercourse quality thanks to a meticulous measuring campaign and the development of various virtual models for sewage systems, wastewater purification and watercourses. Overflows are restricted by the construction of a reed field, for example, a filter or an open buffer basin. Furthermore, the Stadsdommel watercourse, for instance, will be equipped with an installation that provides surface water aeration, which acts as a 'refuge' for fish during overflow periods. The results should, ultimately, serve as a blueprint for nature recovery in the watercourses of other sub-basins throughout Flanders and the Netherlands. In addition to the De Dommel District Water Board, the Flemish Environmental Association, INFRAX and Aquafin are closely involved. The project also fits within the European Water Directive and the European network of protected nature reserves, Natura 2000.

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