Quick dig
The Schnell Graben (SGr) is around 600 meters long, artificially created flowing water in Hanover , which is up to 20 m wide and is much wider than a ditch . The construction project, first mentioned as early as 1449, is the oldest known work on flood defense in Hanover .
location
The Schnell Graben forms the border between the Ricklingen and Calenberger Neustadt districts . In the north is the sports park with the HDI-Arena , in the south the local recreation and landscape protection area of the Ricklinger Masch .
description
In terms of water technology, the Schnell Graben is a receiving water body (also receiving water). It directs large quantities of the water from the Leine into the 3.60 meters lower flowing, then broad Ihme . The Schnell Graben thus contributes to flood protection ; in the event of flooding, it diverts around 90 percent of the water masses in front of downtown Hanover into the Ihme.
From the underwater of the weir (Leine-km 16.75) to the confluence with the Ihme (km 17.31), the Schnell Graben is 560 m long and is another federal inland waterway for which the Braunschweig Waterways and Shipping Office is responsible.
history
The Schneller Graben was mentioned in a document as early as 1449 as the Snellegrave . Even back then, it was supposed to protect the city from floods and supply the city's mills with energy.
In 1647 Duke Christian Ludwig ordered a breakthrough from the leash to the river Ihme. In 1651 this connection was renewed.
After frequent damage, the city built the weir for the first time in 1671. After the weir suffered severe damage in the 1730s, the facility was rebuilt in its current form from 1742 to 1745. At a total cost of 51,000 thalers, it was the most expensive building that the city of Hanover had carried out until then, and it was a burden on the city's treasury for more than ten years. The sculptor Johann Friedrich Blasius Ziesenis created a stone with a cloverleaf coat of arms on this building .
The Bismarck Column was erected on the site of the later Maschsee at the height of the Schnellen Graben by 1904. At the beginning of National Socialism, it was the scene of the book burning in Hanover .
Hydroelectric power plant
After an idea for a hydropower plant that surfaced in 1885, it went into operation on the left bank of the Schnellen Graben in 1922. It was originally intended mainly to supply the nearby Ricklingen waterworks, but even then the excess energy was fed into the city's electricity network.
The plant's two Francis shaft turbines generate around 3.1 million kWh of electrical energy annually, with the water falling at an average height of 2.77 meters, which is fed into the Hannover public utilities network (as of 2009). This regenerative energy can supply around 1,400 households with a consumption of 2,200 kWh each. The hydropower plant is controlled from the control room of the Herrenhausen power plant .
literature
- Flood protection in Hanover (brochure), Building Department Hanover (in cooperation with the press and public relations department in the mayor's office), Hanover, May 2008
- Helmut Knocke , Hugo Thielen : Fast digging. In: Hannover Art and Culture Lexicon , p. 197
- Waldemar R. Röhrbein : Fast digging. In: Klaus Mlynek, Waldemar R. Röhrbein (eds.) U. a .: City Lexicon Hanover . From the beginning to the present. Schlütersche, Hannover 2009, ISBN 978-3-89993-662-9 , p. 547 f.
- Julie Schröder: "The use and structural change of the Leineaue south of Hanover in the late 19th and 20th centuries", master's thesis in history, University of Hanover, 2001.
- O. Ulrich: Christian Ulrich Grupen , Mayor of Hanover Old Town 1692–1767 , 1913, pp. 144–51
- Franz Rudolf Zankl : The waste of the quick ditch. Colored lithograph by JF Salzenberg around 1810 , in the latter (Ed.): Hannover Archive , sheet S 9
Web links
Individual evidence
- ↑ a b c d e f Waldemar R. Röhrbein: Schneller Graben. In: Stadtlexikon Hannover, pp. 547f.
- ↑ Flood protection in Hanover , Building Department Hanover (in cooperation with the press and public relations department in the Mayor's Office), Hanover, May 2008, p. 8
- ↑ Lengths (in km) of the main shipping lanes (main routes and certain secondary routes) of the federal inland waterways ( memento of the original from January 21, 2016 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. , Federal Waterways and Shipping Administration.
- ↑ Directory F of the Chronicle ( Memento of the original from July 22, 2016 in the Internet Archive ) Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. , Federal Waterways and Shipping Administration
- ↑ The brochure Flood Protection in Hanover (see literature) indicates the 17th century on p. 8: {Quote | The "Rapid Ditch" was built as early as the 17th century}
- ↑ Julie Schröder's thesis, p. 38
- ↑ Julie Schröder's thesis, p. 39
- ^ Hugo Thielen: Bismarck column. In: Stadtlexikon Hannover , p. 68; also reprinted series / excerpts from the "Stadtlexikon Hannover" , Hannoversche Allgemeine Zeitung of September 30, 2009
Coordinates: 52 ° 21 ′ 13 ″ N , 9 ° 44 ′ 0 ″ E