Old Emscher

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Old Emscher
The Alte Emscher in the Duisburg-Nord landscape park

The Alte Emscher in the Duisburg-Nord landscape park

Data
Water code DE : 277132
location North Rhine-Westphalia , Germany
River system Rhine
Drain over Rhine  → North Sea
source Landscape Park Duisburg-Nord
51 ° 28 ′ 56 ″  N , 6 ° 47 ′ 37 ″  E
Source height approx.  26  m above sea level NN
muzzle In the Rhine (km 788.5) near Duisburg - Hamborn Coordinates: 51 ° 29 '45 "  N , 6 ° 43' 5"  E 51 ° 29 '45 "  N , 6 ° 43' 5"  E
Mouth height 20  m above sea level NN
Height difference approx. 6 m
Bottom slope approx. 0.77 ‰
length 7.8 km
Catchment area 29.245 km²
Big cities Oberhausen , Duisburg .
Map of the LaPaDu with the course of the Alte Emscher

The Alte Emscher is a 7.8 km long arm of the Emscher in Duisburg with a catchment area of ​​29.2 km². It represents the original estuary of the Emscher .

Significant subsidence in the Meiderich , Beeck and Bruckhausen area around 1900 meant that the water from the Emscher could no longer drain naturally into the Rhine and could no longer collect. In 1910, the Emschergenossenschaft therefore relocated the estuary further north, into what is now the Kleine Emscher .

In 1914, the cooperative built the Alte Emscher pumping station at the lowest point of the Alte Emscher drainage basin .

For a long time the oxbow lake was an open, canalized, surface sewer for household and industrial sewage. In 1995 the construction of underground, separate sewers began, first in the Duisburg-Nord Landscape Park (LaPaDu), which the Alte Emscher runs through over a length of 3 km. The pipes have a diameter of 1.0 to 4.4 meters and they lead the waste water directly to the Duisburg Alte Emscher sewage treatment plant . At the same time, the river was ecologically improved and the recreational value increased through the Emscher promenade and similar measures. Numerous fish swim in the Alte Emscher today, including catfish and pike. The Emschergenossenschaft has signed a lease agreement with the Rheinischer Fischereiverband and the Alte Emscher has officially been a fishing lake since September 2016.

Old Emscher with parts of the ventilation system

The renovation was completed in 1999, and since then only rainwater has flowed in the bed of the Alte Emscher, most of which comes from the sealed areas of the landscape park. On the so-called "water path", the rainwater is directed into two water basins connected one behind the other (location of the former cooling towers), then transferred to the fining ponds and then with a delay into the Alte Emscher (rain retention system). With the help of the wind turbine on the Emscher promenade, part of the water is lifted into the tower and then transported to the bunker gardens. If it is not needed there, it flows back to the clear water course via pipes and falls into it openly, which enriches it with oxygen.

The Alte Emscher is cut off from the Emscher river system, only drains its immediate catchment area in the north of Duisburg and the west of Oberhausen and then lifts the water as a right tributary into the Rhine at km 788.5.

Individual evidence

  1. ↑ a b c Topographical Information Management, Cologne District Government, Department GEObasis NRW ( information )
  2. ↑ Topographical Information Management, Cologne District Government, Department GEObasis NRW ( Notes )
  3. ^ Concept ( Memento of March 13, 2010 in the Internet Archive )

Web links

Commons : Emscher im Landschaftspark Duisburg-Nord  - Collection of images, videos and audio files

Description of this sight on the route of industrial culturehttp: //vorlage.rik.test/~13~11301