The Emscher () is a river, a tributary of the

Rhine ), Surselva, Graubünden, Switzerland , source1_coordinates= , source1_elevation = , source2 = Rein Posteriur/Hinterrhein , source2_location = Paradies Glacier, Graubünden, Switzerland , source2_coordinates= , so ...

, that flows through the

Ruhr area The Ruhr ( ; german: Ruhrgebiet , also ''Ruhrpott'' ), also referred to as the Ruhr area, sometimes Ruhr district, Ruhr region, or Ruhr valley, is a polycentric urban area in North Rhine-Westphalia, Germany. With a population density of 2,800/km ...

North Rhine-Westphalia North Rhine-Westphalia (german: Nordrhein-Westfalen, ; li, Noordrien-Wesfale ; nds, Noordrhien-Westfalen; ksh, Noodrhing-Wäßßfaale), commonly shortened to NRW (), is a States of Germany, state (''Land'') in Western Germany. With more tha ...

in western Germany. Its overall length is with an mean outflow near the mouth into the lower Rhine of .

Description

The Emscher has its wellspring in

Holzwickede Holzwickede () is a municipality in the district of Unna in North Rhine-Westphalia, Germany. It is twinned with Weymouth, Louviers and Colditz Colditz () is a small town in the district of Leipzig, in Saxony, Germany. It is best known for Col ...

, east of the city of

Dortmund Dortmund (; Westphalian nds, Düörpm ; la, Tremonia) is the third-largest city in North Rhine-Westphalia after Cologne and Düsseldorf, and the eighth-largest city of Germany, with a population of 588,250 inhabitants as of 2021. It is the la ...

. Towns along the Emscher are Dortmund, Castrop-Rauxel, Herne, Recklinghausen, Gelsenkirchen, Essen, Bottrop, Oberhausen and Dinslaken, where it flows into the Rhine. At the centre of a vast industrial area with 5 million inhabitants the river is

biologically dead Dead zones are hypoxic (low-oxygen) areas in the world's oceans and large lakes. Hypoxia occurs when dissolved oxygen (DO) concentration falls to or below 2 mg of O2/liter. When a body of water experiences hypoxic conditions, aquatic flora and ...

, as it was used as an open waste-water canal from the end of the 19th century. The partial collapse of many coal mines along the Emscher's route made the option of subterranean sewer pipes running alongside unworkable, as they would break too easily. Owing to the steady flow of spoil from the mining industry it has been impossible for the route of the Emscher to be maintained and its mouth into the Rhine has shifted north twice. A large wastewater treatment plant at its mouth treats the water of the Emscher before it flows into the Rhine.

Restoration

Since the early 1990s, efforts to restore the Emscher to its natural state have been making headway. The last coal mine () was closed in December 2018. Now that coal mining near the route of the river has halted, a large underground pipe is being built along the path of the river. The first stretch of the river to be restored is that in the city of

. The overall project is headed by the public water board

Emschergenossenschaft The Emschergenossenschaft is the oldest and biggest public German water board, („Wasserwirtschaftsverband”) located in Essen (North Rhine-Westphalia/Germany) and responsible for the 865 km2 Emscher catchment with 2.2 million citizens. Th ...

. The financial cost is estimated to be 4.5 billion Euro and the expected completion date for the main work is 2020. The Emscher renaturation project, which is funded by a total of €1.3 billion in EU bank finance, protects and generates 1400 jobs per year.

References

External links

www.emschergenossenschaft.de
{{Authority control Rivers of North Rhine-Westphalia Rivers of Germany