Cloer (Niers)

Cloer
The Cloer near Willich-Neersen just before the confluence with the Niers .
Data
Water code	DE : 286154
location	City area Willich ,  Viersen district ,   North Rhine-Westphalia ,    Germany
River system	Rhine
Drain over	Niers  → Maas  → Hollands Diep  → North Sea
River basin district	Meuse
source	at Willich-Schiefbahn 51 ° 13 '52 "  N , 6 ° 32' 27"  E
Source height	approx.  38  m above sea level NN
muzzle	near Willich-Neersen in the Niers coordinates: 51 ° 14 '50 "  N , 6 ° 27' 33"  E 51 ° 14 '50 "  N , 6 ° 27' 33"  E
Mouth height	approx.  36  m above sea level NN
Height difference	approx. 2 m
Bottom slope	approx. 0.3 ‰
length	6.7 km
Catchment area	10.223 km²
Medium-sized cities	I want to
Residents in the catchment area	around 10,000

The Cloer is a small river in the urban area of Willich in the North Rhine-Westphalian district of Viersen . The Cloer flows into the Niers , a tributary of the Meuse . The name Klörgraben has also been handed down from the 19th century . Occasionally, the actually incorrect spelling Chloer is found .

Official characterization

The Cloer is 6.6 kilometers long and its catchment area is around 10.22 square kilometers.

The entire course of the Cloer is classified by the North Rhine-Westphalian Ministry for Climate Protection, Environment, Agriculture, Nature and Consumer Protection as type 19 ( small low-lying watercourse in river and river valleys ).

The water quality of the Cloer is in quality class II-III and is therefore considered to be critically polluted .

course

The Cloer has two source tributaries, both of which are located southeast of the center of Schiefbahn . The northern of the two source tributaries begins at the L 382 , this is Korschenbroicher Straße , and is fed from the Sürderspick rainwater retention basin . The southern source tributary begins on the L 390 , which is the former federal road 7 , directly on the city and district boundary between Willich and Korschenbroich or between the Viersen district and the Rhine district of Neuss . From there, the southern tributary flows past a pond to the north , turns west behind the pond , runs along the southern edge of the Willich-Schiefbahn motorway junction , bends back to the north behind it and then crosses under the A 52 federal motorway .

Course of the Cloer parallel to the Niersweg in Neersen, seen from the Bettrather Dyk .

The Cloer right next to the Bettrather Dyk .

To the north of the motorway, the southern source tributary flows together with the northern one. In the further course the Cloer flows in the area of Schiefbahn essentially in a westward direction, whereby it runs roughly between the southern edge of the Schiefbahner development and the A 52. After crossing under the street Hessenbende , the Cloer has an inflow from the north from a sewage treatment plant. A little to the west of it, the Cloer finally flows on the northern edge of the Cloerbruch motorway service station, past the A 52 and then along the southern edge of the Knickelsdorf location .

From Knickelsdorf the creek bed of the Cloer then runs relatively straight for a 1.5  km section in a west-north- westerly direction, whereby it crosses under the A 44 a little north of the Neersen motorway junction . On the edge of Neersen the Cloer then flows on the northern edge of the local sports grounds along until they near the local nursery and the primary school direction southwest bends and then at the edge of poplars runs. A little to the southwest of the poplar avenue, the Cloer flows through a so-called regeneration pond , which serves to improve the water quality.

The confluence of the Cloer and the Niers

The Cloer in 1844 as Klörgraben

Following the regeneration pond, the Cloer initially continues to flow in a westerly direction. After crossing under Neersener Hauptstrasse , it turns again in a west-north-westerly direction, runs past an allotment garden and finally at a distance of approx. 70  m parallel to the Niersweg road to the Bettrather Dyk . Here the Cloer bends again towards the southwest and flows about 400 m directly next to the Bettrather Dyk . Then it turns to the northwest and moves away from the street Bettrather Dyk , after about 250 m there is another turn to the southwest, after another 250 m the Cloer finally flows into the Niers , about 300 m northwest of the Mönchengladbach-Neuwerk or . About 600 m northeast of the Viersener monument Haus Donkholt .

The Cloer as a research object

For their research on the chemistry and ecology of the Cloer and its surroundings, the 13 to 15-year-old students Niklas Leven and Christoph Scheinert from Willich-Anrath from the Lise-Meitner-Gymnasium there were three times in a row from 2006 to 2008 in North Rhine-Westphalia State winners of the competition “ Jugend forscht ” in the subject “ Geo- and spatial sciences ”.

In 2008 and 2009, Niklas Leven and Christoph Scheinert also received one of the main prizes in the federal environmental competition twice in a row for their research work on environmental measures and water studies along the Cloer and model tests to improve water quality through effective microorganisms and the implementation of environmental measures .

Web links

Commons : Cloer  - collection of images, videos and audio files

• Ministry for Climate Protection, Environment, Agriculture, Nature and Consumer Protection of the State of North Rhine-Westphalia
• Electronic water information system (ELWAS)
  (online application of the Ministry for Climate Protection, Environment, Agriculture, Nature and Consumer Protection of the State of North Rhine-Westphalia)
• Homepage of the Naturschutzbund Germany (NABU) district association Krefeld / Viersen eV
• Water investigations and environmental measures at the Cloer . (PDF; 1.8 MB) Student work on the Federal Environment Competition 2008
• Model experiments to improve water quality through effective microorganisms and implementation of environmental measures . (PDF; 525 kB) Student work on the 2009 Federal Environment Competition

Individual evidence

1. ↑ ^{a b} Top 50 NRW - Official Topographical Maps North Rhine-Westphalia 1: 50000 (CD-ROM), Version 3.0
   (published in 2000 by the Land Surveying Office North Rhine-Westphalia , Bonn-Bad Godesberg, now: District Government Cologne, Department 7  ( page no longer available , Search in web archives )  Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice. , Accessed on October 16, 2013)  
2. ↑ ^{a b c d} Water directory for the water station map of the State of North Rhine-Westphalia (PDF; 1.1 MB); Retrieved October 16, 2013
3. ↑ ^{a b} Area Directory . ( Memento of the original from October 17, 2013 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. (PDF; 556 kB) Water stationing map of the state of North Rhine-Westphalia (accessed on October 16, 2013) 
4. ↑ ^{a b c d} topographic map 1: 25000, sheet 4704 (Viersen)
   (published by the state of North Rhine-Westphalia, accessed on March 23, 2019)
5. ↑ ^{a b c d} Topographic map 1: 25000, sheet 4705 (Willich)
   (published by the state of North Rhine-Westphalia, accessed on March 23, 2019)
6. ↑ Prussian map recording 1:25 000 - first recording (1844) -, sheet 4704 (Viersen)
   (reprinted 1991 by the state survey office of North Rhine-Westphalia, Bonn-Bad Godesberg (now: Cologne district government), accessed on March 23, 2019)
7. ↑ ^{a b} City of Willich: New Anrath successes in "Jugend forscht" . RP Online , Düsseldorf, April 9, 2009; Retrieved October 17, 2013
8. ↑ Water types in the sub-catchment areas Niers, Schwalm and in the area of ​​the other northern Meuse tributaries Ministry for Climate Protection, Environment, Agriculture, Nature and Consumer Protection of the State of North Rhine-Westphalia; Retrieved October 17, 2013
9. ↑ Surface water bodies in the Niers catchment area (PDF; 399 kB) Ministry for Climate Protection, Environment, Agriculture, Nature and Consumer Protection of the State of North Rhine-Westphalia; Retrieved October 17, 2013
10. ↑ Initial situation water quality, water structure quality and fish in the sub-catchment area Niers (PDF; 407 kB) Ministry for Climate Protection, Environment, Agriculture, Nature and Consumer Protection of the State of North Rhine-Westphalia; Retrieved October 17, 2013
11. ↑ ^{a b c} Niklas Leven, Christoph Scheinert: Water investigations and environmental measures at the Cloer . ( Memento of the original from October 19, 2013 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. (PDF; 1.8 MB), student work on the Federal Environment Competition 2007/2008 (online publication by the Leibniz Institute for Science and Mathematics Education (IPN) at the University of Kiel , accessed on October 17, 2013) 
    
12. ↑ Jugend forscht / Willich: Close to nature Cloer Bach thanks to Niklas and Christoph . WZ Newsline , May 14, 2007, accessed October 17, 2013
13. ↑ Federal Environmental Competition: Main Prizes 2008 ( Memento of the original from October 19, 2013 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. (Online publication of the Leibniz Institute for Science and Mathematics Education (IPN) at the University of Kiel , accessed on October 17, 2013) 
    
14. ↑ Federal Environmental Competition: Main Prizes 2009 ( Memento of the original from October 19, 2013 in the Internet Archive ) Info: The archive link has been inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. (Online publication of the Leibniz Institute for Science and Mathematics Education (IPN) at the University of Kiel , accessed on October 17, 2013)