Great pond (Eilenriede)

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Big pond, 2020

A pond in the city forest of Eilenriede in Hanover , built around the turn of the 19th and 20th centuries, is known as a large pond , also known as a duck pond . It is located in the Vorderen Eilenriede , the southwestern tip of the northern Eilenriede part that protrudes into the east of the city .

History and description

The approximately 1,600 m² pond was created in the course of the creation of a forest park by Julius Trip . During the First World War and the following crisis years, the front Eilenriede was neglected, the ponds were swampy and overgrown. In addition, the groundwater level had dropped due to the construction of the nearby Mittelland Canal . From 1928, under Hermann Kube , the area was again designed as a forest park and an artificial irrigation system was created.

The pond with a wooden bridge near the monument to the forester Heinrich Christian Burckhardt ;
Postcard number 213 , anonymous photographer, around 1900

The large pond was evidently stocked with goldfish in the first half of the 20th century and was therefore referred to as the goldfish pond in the yearbook of the Geographical Society of Hanover published on the occasion of the 700th anniversary of the city of Hanover .

In the pond at the bridge with the ibex figure , a fountain called "Sprudel Ententeich" was installed between 1984 and 1985, based on an artistic design by employees of the Hanover City Forestry Office. As a water feature, a powerful jet of water came periodically from a stone layer in the pond with regular interruptions. For this purpose, the cooling water from the town hall was first directed into the vault of the ship moat and from there pumped under pressure into the pond.

The system was an artistic side effect of the technical intention to raise the water level of the pond. However, the water feature was discontinued in 2010 as part of a pond renovation.

With its proximity to the city, the pond has a recreational function . It is a popular attraction for forest visitors.

Hydrological conditions

Bridge with the ibex figure when the water level is low, 2020

Because of the sandy subsoil, the pond is in direct contact with the groundwater , so that its water level is primarily determined by the groundwater level. The required water inflow is 2,000 - 3,000 m³ per year. A natural water inflow takes place via the water system of the Schiffgraben , whose main water inflow was interrupted by the construction of the Mittelland Canal in the 1920s. The ship moat is now mainly fed by the Wolfsgraben coming from the Kleefeld , whose original river was in turn interrupted by the construction of the Messeschnellweg near Bischofshol . Now it flows into the Eilenriede-Grenzgraben, which stretches along the eastern edge of the Eilenriede and flows into the Schiffgraben near the Weidetorkreisel. For many years this inflow was supplemented by a feeder coming from the Maschsee . This supply line was used on the one hand to cool the town hall and to supply water to the Hanover zoo . In the zoo, after passing through the seal enclosure, the water was filtered and cleaned and, in an amount of around 40,000 m³ per year, was first fed into the piped ship ditch together with water that had passed through the cooling system of the town hall. From there it was pumped into the pond via a pressure pipe in order to compensate for the water loss due to seepage and evaporation of the pond, for which the residual inflow of the ship ditch system was no longer sufficient.

After the water supply from the town hall was stopped in 2007 due to the installation of a new cooling system, the water supply from the zoo was largely stopped in 2008 due to a controversy about the associated costs. As a result, the pond fell dry, all fish and amphibians perished, and the contact area officer responsible for the district at the time filed a complaint of animal cruelty . Thereupon the political committees looked again at the topic and it was decided to seal the pond downwards in order to reduce the water loss as well as to remove the sludge, which deprived the animals and plants living in the water of oxygen. As a result, the sludge was removed to a depth of 1.60 meters during a water restoration in 2010 . This required the removal of 600 m³ of heavy metal sludge and the sealing of the subsurface with clay bricks. In the following years, however, it became clear that the Great Pond continued to dry out again and again in spite of these measures.

  • View from the bridge over the pond

  • Ducks on the pond

  • Capricorn figure on the bridge over the pond

See also

Web links

Commons : Großer Teich (Eilenriede)  - Collection of images, videos and audio files

Individual evidence

  1. ↑ Angelika Zahorka, Michael Nicolay: City lets Eilenriede pond dry up in Bild-Zeitung from July 10, 2010
  2. ↑ top v .: Information printed matter No. 1137/2009: Preservation of the large pond (duck pond) in the front Eilenriede , printed matter of the state capital Hanover of May 14, 2009 on the page e-government.hannover-stadt.de
  3. ↑ Dr. Hallbaum: The front Eilenriede in Hanover. Forest Park and Beauty Forest , in: Gartenkunst , vol. 44, issue 10, pp. 159–164
  4. ^ Hermann Wernicke : Hanover as a garden city , in Erich Wunderlich (ed., Red.): Hanover. Image, course of development and significance of the Lower Saxony state capital. For the 700th anniversary of the city of Hanover (= yearbook of the Geographical Society of Hanover for 1940/41), part 1, Hahnsche Buchhandlung, Hanover 1942, pp. 321–337; here: p. 323; limited preview in Google Book search
  5. ^ Rainer Ertel , Ernst-Friedrich Roesener: Sprudel Ententeich , in this: Hannoversches Brunnenbuch. Fountains and fountains in Hanover. Exemplary and documentary , Hanover: Fackelträger-Verlag, 1988, ISBN 3-7716-1497-X , p. 91
  6. ^ Rainer Ertel , Ernst-Friedrich Roesener: Fountain in Hanover: water features and fountains in their districts. With a contribution by Ludwig Zerull , Cartoon Concept, Hannover 1998, ISBN 978-3-932401-03-9 , p. 40
  7. ↑ Hannover City Administration OE 68: Rainwater Management HCC. In: Meeting management of the city of Hanover. City administration of the state capital Hanover, June 3, 2008, accessed on January 28, 2020 .
  8. ↑ Meeting of the City District Council Hannover-Mitte on November 10th, 2008: Water balance in the Eilenriede. In: Meeting management of the city of Hanover. State capital Hanover, December 22, 2008, accessed on January 28, 2020 .
  9. ^ Dieter Prokisch: Ententeich in the Eilenriede. In: Meeting management of the city of Hanover. CDU parliamentary group of the Hannover-Mitte district council, January 1, 2009, accessed on January 28, 2020 .
  10. ^ Dieter Prokisch: Duck pond and other waters in the Eilenriede. In: Meeting management of the city of Hanover. CDU parliamentary group in the district council center, November 27, 2008, accessed on January 28, 2020 .
  11. ↑ JULIA-M. MEISENBURG: Eilenriede - ponds dried up. In: bild.de. BILD, July 7, 2009, accessed on January 28, 2020 .
  12. ↑ Conrad von Meding: Where is the arsenic from the duck pond? In: haz.de. Hannoversche Allgemeine Zeitung, April 21, 2009, accessed on January 28, 2020 .
  13. ↑ Answer of the administration to the CDU inquiry Ententeich and other waters in the Eilenriede meeting of the city district council center on December 15th, 2008. In: Meeting management of the city of Hanover. City administration of the state capital Hanover, December 15, 2008, accessed on January 28, 2020 .
  14. ↑ Hannover City OE 67.7: conservation of the pond (Ententeich) in the front Eilenriede information :. In: Meeting management of the city of Hanover. City administration of the state capital Hanover, May 14, 2009, accessed on January 28, 2020 .
  15. ↑ Michael Soboll: City puts duck pond under observation. In: haz.de. Hannoversche Allgemeine Wochenzeitung, April 21, 2011, accessed on January 28, 2020 .
  16. ↑ Susanna Bauch: Pools in the Eilenriede are drying up. In: haz.de. Hannoversche Allgemeine Zeitung, August 16, 2012, accessed on January 28, 2020 .
  17. ↑ City administration Hannover OE 18.62.01: Response of the administration to the request for water shortage in the duck pond meeting of the city district council center on June 20, 2011 . In: Meeting management of the city of Hanover. State capital Hanover, June 20, 2011, accessed on January 28, 2020 .

Coordinates: 52 ° 22 ′ 47.2 "  N , 9 ° 45 ′ 23.6"  E