Sorvistenjärvi

Sorvistenjärvi is a freshwater lake situated in the municipality of Jämsä in Central Finland. The lake lies within the Kymijoki basin, which drains into the Gulf of Finland. It covers an area of approximately 4.2 square kilometres (1.6 square miles) and reaches a maximum depth of 25 meters (82 feet). The shoreline extends roughly 18 kilometres, featuring a mixture of gently sloping banks and rocky outcrops. The lake is fed primarily by several small streams and runoff from surrounding agricultural land, while its main outflow is a modest river that continues into the larger Jämsäjärvi system.

The water quality of Sorvistenjärvi is generally good, with a relatively low level of nutrient enrichment, thanks to effective land‑use management in the catchment. Seasonal variations lead to clear water in late summer, providing suitable conditions for recreational activities such as swimming, kayaking, and windsurfing. In winter, the lake frequently freezes, offering opportunities for ice fishing and cross‑country skiing on the protected shoreline.

Biologically, Sorvistenjärvi supports a typical boreal fish community, including perch, zander, whitefish, and pike. The lake is occasionally stocked with trout during the spring for sport fishing. Aquatic plants such as bulrush and waterlily are common in shallower areas, while submerged vegetation is sparse in deeper zones. Conservation efforts focus on maintaining water quality, controlling invasive species, and monitoring fish populations to uphold ecological balance and recreational value.