Schwielochsee is a freshwater lake located in the district of Dahme‑Spreewald in the federal state of Brandenburg, Germany. It lies within the Spreewald region, a UNESCO‑designated biosphere reserve, and is situated near the municipalities of Schmöckwitz and Schmogrow‑Fehrow. The lake is part of the Spree River system, with the Spree River flowing into and out of the lake.
Geography
- Surface area: approximately 7.86 km² (2.04 sq mi)
- Maximum depth: about 7 m (23 ft)
- Mean elevation: roughly 64 m (210 ft) above sea level
- Hydrology: The lake receives inflow primarily from the Spree River, supplemented by smaller tributaries such as the Ragöse. Its outflow continues downstream along the Spree, eventually joining the Havel and then the Elbe River.
Geological origin
Schwielochsee is considered a post‑glacial lake that formed in the meltwater channels left by the retreat of the Scandinavian ice sheet at the end of the last Ice Age. Its basin was later shaped by fluvial activity of the Spree and its tributaries.
Ecology
The lake and its surrounding wetlands support a variety of aquatic and semi‑aquatic habitats. Typical fish species include pike (Esox lucius), perch (Perca fluviatilis), and various cyprinids. The shoreline is bordered by mixed forest and reed beds, providing nesting grounds for waterfowl such as the mute swan (Cygnus olor) and the great crested grebe (Podiceps cristatus). The lake lies within the protected area of the Spreewald biosphere reserve, which imposes conservation measures to preserve its natural values.
Human use
Schwielochsee is a popular destination for recreational activities, including boating, angling, and swimming. Small ports and marinas facilitate tourism, and the lake is accessible via local road networks. The surrounding villages have developed modest hospitality facilities catering to visitors drawn by the scenic landscape and the broader cultural heritage of the Spreewald region.
Historical and cultural notes
The name “Schwielochsee” is of Slavic origin; it is believed to derive from the Sorbian word svěl or světlý, meaning “bright” or “clear,” referencing the lake’s water quality. The exact historical first mention of the lake is not documented in widely available sources, and detailed records of early settlement around the lake are limited.
Conservation status
As part of the Spreewald biosphere reserve, Schwielochsee is subject to environmental monitoring and management plans aimed at balancing human recreation with the preservation of water quality, biodiversity, and natural habitats. Local authorities cooperate with regional and federal environmental agencies to enforce water protection regulations.
References
- Brandenburg Ministry for the Environment, Nature, and Energy. “Gewässerinformationssystem Brandenburg” (Water Information System).
- UNESCO World Heritage Centre. “Spreewald Biosphere Reserve.”
- German Federal Agency for Cartography and Geodesy (BKG). Topographic maps and hydrographic data.
Note: Specific historical dates and certain etymological details are not definitively established in publicly available encyclopedic sources; therefore, those aspects are presented with the caveat of limited documentation.