Isojärvi (Satakunta)

Isojärvi is a medium-sized lake in Finland. It is situated in the region of Satakunta in Western Finland and in the municipalities of Pomarkku in south and Siikainen in north. The lake is a part of the Karvianjoki basin that drains into the Gulf of Bothnia.[1]

Isojärvi
Isojärvi
Location	Pomarkku, Siikainen
Coordinates	61°44′N 21°48′E
Primary inflows	Pomarkunjoki
Primary outflows	Merikarvianjoki, Salmusoja
Basin countries	Finland
Surface area	38.824 km2 (14.990 sq mi)
Average depth	2.93 m (9 ft 7 in)
Max. depth	10.2 m (33 ft)
Water volume	0.114 km3 (92,000 acre⋅ft)
Shore length1	199.39 km (123.90 mi)
Surface elevation	34.8 m (114 ft)
Frozen	December–April
Islands	Iso Rooholma, Honkaluoto, Kiilholma
Settlements	Pomarkku, Siikainen
References	[1]
1 Shore length is not a well-defined measure.

Isojärvi is common lake name in Finland. There are 31 lakes with this name. Satakunta's isojärvi is the biggest of them.[2]

The lake is a bifurcation lake: the main part of its waters flow into the Merikarvianjoki River that mouths into the Gulf of Bothnia in Merikarvia but part of the waters flow through the Salmusoja River into lake Poosjärvi that drains through the river Poosjoki – Lampinjoki – Pohjajoki into the Gulf of Bothnia in Ahlainen, Pori.