Falkertsee

BW

The Falkertsee is a lake in the Gurktaler Alps in Carinthia north of Father streets. It is a surface warm high mountain.

Geography

The Falkertsee is located in the western Alps Gurktaler and is likely to be of glacial origin. The geological subsoil consists of Quarzphylliten of the Nock Mountains within the Gurktaler Alps.

The lake is 1872 m above sea level. Its catchment area including lake area is 92 ha Its greatest length is 305 m, its greatest width 187 m. The greatest depth is 13.2 m, the average depth is 5.6 m. The total area is 43,180 m², with 54 m² to 43 126 m² rocks and relate to the lake surface. The water volume is 240 618 m³. The shoreline length is 906 m.

Although the surface is very rugged, the pelvic shape of the lake is quite simple. This is reflected in the low basin roughness of 3.7. The lake bottom is very steep in the north- western part of the lake, the 9- m isobath is only 16 meters from the shore.

Hydrology and Ecology

The surface temperature may reach 13 ° C in summer. A distinct thermocline but is not formed.

The conductivity of the sea water is very low ( 54-59 mS / m). The pH of the water was in August 1982 from 7.3 to 6.9, while the mixing time in November from 8.2 to 8.3. The highest measured alkalinity was 2.77 ° dH. Oxygen saturation fell in August from 98 % in 1 m water depth to 71% at 12 m depth. During the mixing of a supersaturation of 5 was present to 17 %. The total phosphorus was in the summer in the upper 8 m around 8 g / l, above ground to 57 ug / l During the mixing of the whole water body had values ​​greater than 20 ug / l

The Phytoplanktonmasse was in the epilimnion (0-6 m) average 1095 g / m³ in August and 1508 g / m in November. The total algal biomass in the water column up to 13 m depth in summer was 11.9 g under one square meter in November at 22 g This increase in November was due to the increase in Chlorophyceae, especially Planktosphaeria gelatinosa caused. In the summer of diatoms predominated (52% ), followed by Chrysophyceae, Cryptophyceae and Chlorophyceae (14-16 %). In autumn, the Chlorophyceae dominated with 51 %, followed by diatoms and Cryptophyceae.

In the lake five species of fish. The stock of Arctic char ( Salvelinus alpinus ) is occupied since the Middle Ages. 1986/87 brook trout ( Salvelinus fontinalis ) and American arctic char ( Salvelinus namaycush ) were used, which are regarded as food competitors for natural resources. The formerly high stocks of minnows ( Phoxinus phoxinus ) have fallen sharply in recent years. Furthermore, coming in still lake trout (Salmo trutta f fario ) ago.

The chemical parameters as well as for high mountain lakes quite high algal biomass showed a load of the lake with nutrients from the catchment area. The lake was classified in 1982 as mesotrophic.

Use

At the lake there are hotels, snack bars and weekend houses.