Lake Ladoga

 

Location :

Leningrad District, Karelia, Russia

59 °54' – 61 °47' N , 29 °47' – 32 °58' E, 4,8 m above sea level

Description::

Lake Ladoga is the largest lake in Europe. It is one of the northernmost of the world's large lakes. The state of its ecosystem results from a complex interaction of natural processes and anthropogenic impacts on the lake and its watershed. The grate catchment area of Lake Ladoga ( 258000km2 ) includes three large sub-basins each with a central lake: Lake Onega-River Svir ( 83200 km2 ), Lake Ilmen-River Volkhov (80200 km2) and Lake Saimaa-River Vuoksi ( 66700 km2 ), and several smaller riverine drainage areas ( 28400 km2 ).

The time required for renewal of the water in lake Ladoga is 11 years, which indicates that the ecosystem is rather conservative. River discharge accounts for 86% of water balance input, which implies that catchment processes have a major influence on water quality.

Lake Ladoga is situated on the borderline between the crystalline Baltic shield and Great Russian Plain, and the geological history of its drainage basin is very complicated. Differences in the geological structure of the watershed are reflected in the structure of both shores and depressions of the lake.

Lake Ladoga is a cold-temperate climate ecosystem. Contrasting air masses of different origin collide here and the resulting unstable climate is characterized by frequent changes of weather.

Physical dimension :

The Ladoga lake takes 16 place on area and 14 volume among the largest lakes of the world.

Height above the sea level - 5.1 m
Drainage area – 258600 km 2
Lake area – 17872 km2
Volume – 837.9 km 3
Mean depth – 46.9 m1
Maximum depth – 230 m1
Shoreline length – 1570 km1

Maps :

Bathymetric map
Map of the catchment area
Map of the physiographic zonning
 

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