Finnish Lakeland or theFinnish lake district (Finnish:Järvi-Suomi[ˈjærʋiˌsuo̯mi], "Lake Finland",Swedish:Insjöfinland) is a largelandscape region in central easternFinland.
The hilly, forest-covered landscape of Lakeland Finland's lakeplateau is dominated bydrumlins and by long sinuouseskers. Both areglacial remnants deposited after thecontinental glaciers that scoured and gouged the country's surfacereceded about10,000 years ago.
The lake basins of the lakeland originate from the joint work ofweathering and erosion offractures in thebedrock. The erosion that made the depressions occurred before and during theQuaternary ice ages.[1] Erosion along fractures has produced linear inlets among the lakes.[2]
The district occupies most of the central and East Finland and is bounded to the south by theSalpausselkä Ridges. These ridges areterminal moraines, which trap networks of thousands of lakes separated by hilly forested countryside.
The lake district turns into the Coastal Finland district to the West and Northwest, and is bounded by theUpland Finland to the North.
The lake landscape continues to the East and extends intoRussia (Karelian Isthmus andRepublic of Karelia).
Finnish Lakeland stretches approximately 370 kilometers from south to north and about 350 kilometers from east to west.
Lakes occupy about 25% of the Lakeland. Much of the territory is forested and has a low population density. The main cities in the region areImatra,Joensuu,Jyväskylä,Kuopio,Lappeenranta,Mikkeli,Pieksämäki,Savonlinna andVarkaus. Since lakes formed the main transport route in earlier times, urban areas are often located on lakeshore, occasionally even on isthmuses or peninsulas, e.g. Varkaus, Savonlinna and Kuopio. The lakes often have extremely convoluted coastlines and consist of several nearly separate stretches of open water (selkä) connected by narrow sounds. Thus, they can connect large areas along shores and their hinterlands.
Because no set definition of what constitutes a lake and no procedures for counting the number of lakes exist, it has been impossible to ascertain exactly how many lakes the region has. There are, however, at least 55,000 lakes that are at least 200 metres wide.
If lake is defined to be a body of standing water larger than 500 square metres, then there are 187,888 lakes in Finland. On average, there are 40 lakes per 100 square kilometres in the district. The lake number density is largest north of theLake Inari, up to 1,000 per 100 square kilometres, so that the area is sometimes calledLampi-Suomi (Pond Finland, Finnish pond district).[3]
The largest isLake Saimaa, which, with a surface area of more than 4,400 square kilometres, is thefourth largest natural freshwater lake in Europe. Lake Saimaa itself contains 5,484 islands,[4] and islands in the greater Saimaa region (Finnish:Suur-Saimaa) number up to 13,710.[5] The deepest lake,Päijänne, has a maximum depth of only 95.3 metres; the depth of the average lake is 7 metres.
TheSaimaa Canal connects the Lake Saimaa to theVyborg Bay of theGulf of Finland,Baltic Sea. Another connection to the Baltic Sea is theVuoksi River, which flows from Saimaa toLake Ladoga, from where the water subsequently flows throughNeva River into the Gulf of Finland, bypassing the Salpausselkä.
LakePäijänne is the second-largestlake inFinland, which drains into the Gulf of Finland via theKymi River and which is used as a drinking water supply forHelsinki.
Finnish Lakeland travel guide from Wikivoyage