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Water in geopark

Libuňka

The natural monument Libuňka is declared in the vicinity of the river Libuňka. The main object of protection is naturally meandering stream Libuňka. Meandrs are between the municipalities Ktová and Borek pod Troskami. It is 2.6 km.

Libuňka meanders in alluvial plain, formed by Quaternary sediments. Meandering rivers in the landscape is dynamic, constantly ongoing process. Erosion is on the outside of the bend and the storage material the inside. It is due to the difference in velocity of the water between the inside and the outside of the bend. Sometimes deep meanders are punctured, thereby the watercourse is straightening. The shape of the river bed is thus continuously changing even today. The Libuňka river even ran in the opposite direction during Paleolithic.

Semi-tree-lined vegetation is situated on the banks of Libuňka. There are three kinds of elms – Wych elm (Ulmus glabra), Fluttering Elm (Ulmus laevis) and Field Elm (Ulmus minor). The undergrowth is very poor and contains mostly field weeds. Natural monuments included residues adjacent floodplain meadows, which are regularly flooded during the floods and are mainly cultural character. The problem is, as same as in other places, invasive Himalayan balsam (Impatiens glandulifera). Its occurrence is limited due care Administration PLA Bohemian Paradise.

There have been found 49 species of vertebrates, four of them are specially protected, on the territory of natural monuments. 27 species of birds are nested and 19 kinds visit location during the year. Interesting animals are water birds such as dipper (Cinclus cinclus), Common Kingfisher (Alcedo atthis), River Warbler (Locustella fluviatilis) and gray wagtail (Motacilla cinerea).

GPS position

N 50° 32.089', E 15° 13.545'
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[MAPY.CZ]

Contact

Geopark UNESCO Český ráj
Jiří Vlasák
e-mail:vlasak@geopark-ceskyraj.cz
http://www.geopark-ceskyraj.cz