|Geographical location||Germany , Brandenburg|
|Location close to the shore||Blankensee|
|Altitude above sea level|
|Maximum depth||3 m|
The lake is under nature protection
The Grössinsee is located in the Nuthe-Nieplitz Nature Park in the area of the city of Trebbin in the Potsdam-Mittelmark district . It extends from southwest to northeast over a length of 1.85 kilometers and has a width of 570 meters.
The Nieplitz , which comes from the Blankensee , 1.3 kilometers away , enters the lake in the southwest and leaves it in the northeast, around 300 meters down the Schiaßer See and after 2.1 kilometers the confluence with the Nuthe am Gröbener To reach Kietz .
The entire lake, which lies in a natural meadow landscape , is a valuable biotope . It belongs to a chain of lakes formed by the Nieplitz in the Nuthe-Nieplitz lowland, which was formed around 20,000 years ago at the end of the Vistula Ice Age as an interurge valley between the thawing glaciers. The silting , partly reed -covered banks are swampy and inaccessible. On the southeast bank there is a narrow alder break. The polytrophic body of water has no underwater plants and shows considerable phytoplankton developments in summer with a maximum depth of 30 centimeters.
Its northwest bank partially forms the border between the districts of Teltow-Fläming and Potsdam-Mittelmark. 900 meters northwest of the lake is the district of Tremsdorf in the municipality of Nuthetal , 600 meters to the east the districts of Schiaß and 1.4 kilometers east of Mietgendorf in the town of Ludwigsfelde . The village of Blankensee , which belongs to Trebbin, is 800 meters south . The country road from Jütchendorf to Schönhagen runs past the south-east bank at a distance of around 200 meters .
Bathing and fishing are prohibited. The lake is managed by the GbR Binnenfischerei Potsdam . The common fish include roach , lead and white bream . Intensive pig breeding was carried out on the northwest and southeast banks of the lake until the early 1990s . The stables have since been dismantled. The foot of the Glauer Berge is located south-east of the Grössinsee, approx. 700 meters away .
- The waters of the Nuthe-Nieplitz lowland. Website of the ornithological working group in the landscape development association Nuthe-Nieplitz-Niederung eV