Kleine Weser und Werdersee

The Small Weser in Bremen is a 2 km long tributary of the Weser. It separates the western part of the city, including Werder Teerhof of the New Town, including Buntentorsvorstadt.

The Werdersee is a 1953-1960 landscaped and 1981-1987 enlarged lake in the flood channel upstream of the Kleine Weser Weser.

History

From the Middle Ages until the construction of the weir in 1968 on Teerhof the little river was more ( in the 17th century, three and a half miles long, as far as Huckelriede ) an upstream blind -ending tide waters, which received from the direction Mittelweser only river flood by a flood channel water, strictly speaking, thus, a narrow, long bay in an old river bed. She was also " Ohle Weser " ( " Alte Weser " within the meaning of oxbows ) called. In the 1930s, planned Bremen Planning Director Gerd Offenberg the unrealized investment Werder a lake with a boat race course.

From 1953 to 1960, the flood channel was relocated to improve flood protection and partially recessed. Was she previously diverted towards the Peter islets from the bed of the river Weser, ie below the 1911 -built Hemelinger Weser weir, it branches off since then two miles from the river above this weir. This created the opportunity to relieve the Weserwehr at high water. In addition to the previously existing partially parallel flood channel could be saved by Peter Werder. As part of these measures, the Werdersee was created under the slogan "From the city center to the countryside ", designed by Wilhelm Hübotter from ca 1953. He started on Deichschartweg and was 2.4 km long. His environment is designed like a park with lawns and playgrounds. From the Kleine Weser the Werdersee was separated by a land bridge through which consisted of only a relatively narrow connection.

1968 320 meters east of its confluence with the Weser was built a weir into the Little River Weser, which shields them above the Tide.

In the Weser flood from March 1981, the flood channel is not proven. The inflow from the Middle Weser water masses mostly took a different path, flowed already at the Werder Bridge (now Karl- Carstens Bridge ) in the lower Weser and dug it deep new bed.

After the conclusion of the resultant in the flood dike gaps were made in the years 1981 to 1987 substantial alterations to ensure that in similar future floods ( since not yet occurred ), the water has a better guide: The easternmost part of the flood channel was increased to increase the flow velocity on passing water to slow down. At the same time the summer dike at the junction of the channel was removed from the middle Weser. Now a summer dike limits the flood channel laterally towards the town of Werder. In the field of Karl Carstens bridge the flood channel was deepened to keep water flowing from the bridge foundations. This was the Werdersee Weser upward extended for a kilometer 's enough under the bridge as far as the military road. The land bridge between Werdersee and Small Weser has been removed, so that from the middle Weser overflowing its banks flooding may optionally be discharged without obstruction in the lower Weser.

North of the flood channel, ie through the eastern end of the city reclaimed Werder, the Werderseezuleiter has been created, which is provided at two dike passages with sliders, but was designed as a compensatory measure for construction work in the port area similar nature.

Today's state

Part of the 1981 "wild" resulting flood bed was left (see also: Weser breakthrough 1981). Here now is the nature reserve New Weser with a bay rich lake. The larger, eastern part of the Kleine Weser, together with the subsequent Werdersee a 5.22 km long standing waters ( technical term " pond "). The shoreline can not accurately detect the boundary between the two. By definition, it is in the former course of the Deichschart path. With the slide of the Werderseezuleiters the water flow rate is kept at 4 m / s, ie 1.2 % of the average Weser flow of 325 m³ / s Thus, the Werderseezuleiter is suitable as a fish pass and also the fish ladder at the weir of the small river Weser. The water level of the lake Werder is 3.8 m above sea level 70 cm below the middle Weser ( here 4.5 m above sea level).

The lake now has an area of ​​about 37 hectares, is the largest lake in Bremen. Its maximum depth is three meters, its maximum width 308 meters. West of Karl Carstens bridge is located on its northern shore a closed to the public Bird Island, east of the bridge on the south bank two small islands and a peninsula on the north shore and a smaller peninsula.

Is used the lake for various sports and leisure activities, as located on its banks several water sports clubs, large lawns and an artificial beach with shallow parts. In addition, the Great Bremer rowing regatta takes place here every year.

The western 300 meters of the Kleine Weser are still a tidal waters. Separation from the still waters forming the weir in the Kleine Weser, which shuts off the tidal range. The weir was built in 1972 ten years after the flood of 1962, between the Teerhofinsel and the Altendeich on the new town side.

Bridges

The Small Weser has four bridges or transitions:

  • The Mayor Smidt Bridge ( predecessor 1872) crossed the Weser and the tidenabhängigen part of the Kleine Weser at the top of Teerhofs.
  • The weir of the small Weser, pedestrians and cyclists only, is located just northwest of the site of the historic bride bridge was the only crossing over the small river Weser to 1872. This transition is therefore often referred to as a bride bridge.
  • The Wilhelm- Kaisen-Brücke (southern part ) is the successor to the 1895 -built southern continuation of the great river bridge. The Wilhelm- Kaisen-Brücke is therefore actually consists of two bridges and the interconnecting 100 meters normal road.
  • The unnamed bridge for pedestrians and cyclists at the Buntentorsdeichschart was built as part of the transformation since 1981 and is located a few meters west of the former land bridge between Werdersee and Small Weser ( with the Deichschartweg ).

The Werdersee spans since its extension a bridge:

  • The 1966-1971 Werder bridge built on piers extending from Peter Werder ( foothills of the Easter dyke ) to over the Habenhauser dike. It was renamed Karl Carstens bridge in 1999. Colloquially, the connection in Bremen is also known under the name "Strawberry bridge ". This is reminiscent of the great strawberry plantations that existed earlier in Habenhausen. Even today it is called by many as Bremen.

Swell

  • Topographic map 1:50 000, Sheet L 2918, Bremen, Lower Saxony LGN, Hannover in 1980 and 1999
  • Official map of Bremen 1:20 000, Cadastral Office Bremen (now Geo Bremen ), 1980 and 1992
  • Bremen Town plans of 1882 and 1931, to see in the Bremen State Archives, reduced in Bremen house. The Sparkasse in Bremen, 1982.
  • Bremen and its neighborhoods. Edition prying, Bremen 2003, ISBN 3-86108-685-9, pp. 263 ( map of the Swedish siege of Bremen 1666) ( typo in the caption).
Naturschutzgebiet Throughput Kuhgrabensee Mahndorfer See Unisee (Bremen)
479435
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