Lake Tåkern

This lake has an area of c. 44 km², a mean depth of only 0.7 m, and a maximum depth of barely 2 m. About 60 species of vascular plants live in this extremely shallow lake. A comprehensive part of the lake is covered by tall and dense reeds of Phragmites, and a large part of the bottom below the free water surface is carpeted by Chara spp.

Upper part of core 520 from a depth of 1 m in the eastern part of Lake Tåkern.

Lower part of core 520.

The hard layer found at and just below a depth of 33 cm in this core probably reflects a period with erosion and redistribution of sediment, caused by the lowering of the water level in 1844 with about 1.7 m. The curves, showing variations in the film density along the centerline of the radiographs, were scanned by a Joyce-Loebl double-beam flat-bed microdensitometer (3CS). 

Coring sites in Lake Tåkern.

The radiographs of sediment cores from this lake comprises four cores (517 - 520) sampled on 1979-05-28, and of ten cores (596 - 605) sampled on 1980-04-02. The calculated mean annual rate of sedimentation within the area of the free water surface, covering about 25 km², amounted to 2 - 3 mm, corresponding to about 0.4 kg of solids per m² and year for the period 1844 - 1980.

A larger file in Swedish.

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