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Both Flade and Ørum Sø are shallow. Originally, they were part of Krik Vig and thus the Limfjord. However, in the 17th century, sand drift (dunes moving inland) separated the two lakes from the bay. In other words, back then, it was just one large lake, Flade Sø, covering around 1200 hectares, which has been significantly influenced by human activities over time through canal construction and drainage.
In the latter half of the 19th century, a consortium led by English financiers attempted to drain the large lake, intending to provide grass for the many cattle, which was a major export product at the time. However, it turned out to be too expensive to maintain the area drained. Thus, the ambitious project was abandoned after a few years.
Nevertheless, the project's early efforts in coastal defense at Flade Sø were later reinforced. In 1958, the substantial coastal defense dike was constructed to protect the hinterland, effectively separating Flade Sø from the other lakes and the Hvidbjerg Å system.
Otters, Birds, and Lampreys
Ørum Sø is part of the Hvidbjerg Å system and drains into Krik Vig through Roddenbjerg Sø and Kastet Å. The entire area is a Natura 2000 site, affording it special protection. This region serves as a core area for otters, maintaining a stable population.
Simultaneously, it provides habitat or potential habitat for the rare lampreys, a blood-sucking fish species resembling eels.
The birdlife thrives abundantly in both Flade Sø and Ørum Sø. Here, you can witness a diverse array of ducks and wading birds. Species such as greylag geese, gadwalls, teal, northern lapwings, redshanks, and dunlins breed in this area. Meanwhile, tufted ducks, pochards, scaups, curlews, black-tailed godwits, and bearded tits use the lakes as an essential resting place during their migrations.
Find your way to Flade Sø