Restoration of Lyngsø
The environmental goal of good condition in Lyngsø has not been met. The water is turbid due to algae, and the fish stock is characterized by too many shells, bream and small fish, while large individuals of the predatory fish perch and pike are too few. A feasibility study has shown that a combination of fishing for peace fish followed by laying out a product for binding phosphorus on the lake bottom will be the most optimal effort within the framework of the subsidy scheme in the efforts to get clear water and a good fish stock with many predatory fish. In addition, we work with Silkeborg Forsyning to reduce the discharge of phosphorus from rainwater inputs to make the lake completely restoration-ready.
Silkeborg Municipality has received a commitment from the state for a grant to carry out a restoration of Lyngsø through a combined effort with fishing of peace fish and treatment of the lake bottom with Phoslock. The effort is planned to be completed in 2021-2022. Phoslock is a clay product enriched with the element lanthanum. Lanthanum binds phosphorus in the lake bottom, so it is not available for algae growth. All authority permits for the fishing have been announced, but the authority permit from the Danish Environmental Protection Agency for the application of Phoslock is not yet in place.
Lyngsø has arisen in a death hole from the last ice age. The lake is 9.7 ha in size and is located in the southern part of Silkeborg partly surrounded by villas. The Danish Nature Agency, which is the sole owner of the lake, supports having the lake restored.See the feasibility study:
Preliminary investigation of restoration of Lyngsø incl. Appendix
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