Vesijako

Vesijako (also Vesijakaa) is a lake in Finland. It is situated in Padasjoki in the region of Päijänne Tavastia.[1]

Vesijako
Vesijako
Location	Padasjoki
Coordinates	61°23′N 025°00′E
Type	Lake
Catchment area	Kymijoki, Kokemäenjoki
Basin countries	Finland
Surface area	16.5 km2 (6.4 sq mi)
Average depth	7.16 m (23.5 ft)
Max. depth	37 m (121 ft)
Water volume	0.118 km3 (96,000 acre⋅ft)
Shore length1	80.4 km (50.0 mi)
Surface elevation	108.4 m (356 ft)
Frozen	December–April
Islands	Isosaari
References	[1]
1 Shore length is not a well-defined measure.

The lake is famous in Finland as a bifurcation lake (the name Vesijako actually means "drainage divide"), together with the nearby Lummene that is somewhat less known, and from which waters flow eastwards into lake Päijänne and westwards through the lake Vehkajärvi into lake Vesijako.

Vesijako in its turn has also two outflows. One is eastwards to the lake Päijänne, which is a part of Kymijoki basin and drains to the Gulf of Finland. Other outflow is into a chain of lakes that is a part of the Kokemäenjoki basin and consists of the lakes Kuohijärvi, Kukkia, Iso-Roine, Hauhonselkä and Ilmoilanselkä and ends into lake Mallasvesi, from which the waters flow through Vanajavesi and Pyhäjärvi towards Kokemäenjoki in the west.