Lac de Narlay

The Lac de Narlay is a lake in the French Jura, in the Jura, around 10 km south of Champagnole in Franche -Comté. It is situated at 748 m above sea level. M. on the floor of the town of Le Frasnois and occupies an area of ​​approximately 0.4 square kilometers. The lake is 950 m long and up to 625 m wide. Its greatest depth is 40 m.

The Lac de Narlay situated in a depression northeast of Le Frasnois in which the five lakes region. It is nestled between the forest heights of Sur les Agrailles ( 889 m above sea level. M. ) in the north and Mont des Ifs ( 892 m above sea level. M. ) in the southeast. Especially in the southeast of the lake has steep riverside areas, otherwise the banks are relatively flat and partially bordered by a narrow swamp belt. Unlike the other lakes in the region of Lac de Narlay is not primarily of glacial origin, but arose as a result of the collapse of a karst cave system.

The Lac de Narlay is fed by several springs on the slopes of the surrounding hills. Dewatering is underground through several sublakustrische percolation funnel near the west bank. Mountian experiments have shown that the water comes to light again in the source Source du Moulin at Chalain. Thus, the Lac de Narlay belongs to the catchment area of ​​Chalain, while the adjacent Lacs de Maclu and Lac d' Ilay be drained to Hérisson.

The landscape around the Lac de Narlay is under protection. In summer the lake is used for swimming and because of its depth for diving. The water is very clean, so that in the lake extremely rare freshwater crayfish, which are also protected. On the western shore there is a camp.

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