Lake Helmuth Schack (German: Helmuth-Schack-See or simply Schacksee) is a lake in Osdorf,

Hamburg Hamburg (, ; ), officially the Free and Hanseatic City of Hamburg,. is the List of cities in Germany by population, second-largest city in Germany after Berlin and List of cities in the European Union by population within city limits, 7th-lar ...

Germany Germany, officially the Federal Republic of Germany, is a country in Central Europe. It lies between the Baltic Sea and the North Sea to the north and the Alps to the south. Its sixteen States of Germany, constituent states have a total popu ...

, adjacent to the boundaries of Schenefeld in

Schleswig-Holstein Schleswig-Holstein (; ; ; ; ; occasionally in English ''Sleswick-Holsatia'') is the Northern Germany, northernmost of the 16 states of Germany, comprising most of the historical Duchy of Holstein and the southern part of the former Duchy of S ...

. Düpenau stream runs through it, and the small stream of

Luruper Moorgraben Luruper Moorgraben (''Lurup Bog Ditch'') is a small stream in Osdorf, Hamburg, Germany, partially marking the boundaries of Lurup, Hamburg, after which it is named. It comes to the surface near the street of Knüllkamp in Osdorf. Nearby, from th ...

flows into it.

History

Lake Helmuth Schack is located in the Born Park and was created artificially as a

retention basin A retention basin, sometimes called a retention pond, wet detention basin, or storm water management pond (SWMP), is an artificial pond with vegetation around the perimeter and a permanent pool of water in its design. It is used to manage ...

for the regulation of water levels. Before the establishment of the retention basin there was the ''Deesmoor'', a remnant of the glacial moor valley on the northwest edge of the Osdorf fields. A weir was constructed, and the area was flooded.Helmuth-Schack-See
aig-hamburg.de Over the years, the Born Park was developed around the Schacksee, which is today used as a recreational area, mostly by the inhabitants of Osdorf, Osdorfer Born and nearby Schenefeld in Schleswig-Holstein.

References

{{Reflist Geography of Hamburg