Negro (Ruhr)

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Marking stone "An den Negerquellen" on Klappersberg

Marking stone "An den Negerquellen" on Klappersberg

Water code DE : 276114
location Germany
River system Rhine
Drain over Ruhr  → Rhine  → North Sea
source On the Klappersberg near Schmallenberg - Rehsiepen
51 ° 12 ′ 23 ″  N , 8 ° 25 ′ 31 ″  E
Source height approx.  720  m above sea level NHN
muzzle near Olsberg - Steinhelle in the Ruhr Coordinates: 51 ° 19 ′ 51 ″  N , 8 ° 29 ′ 19 ″  E 51 ° 19 ′ 51 ″  N , 8 ° 29 ′ 19 ″  E
Mouth height approx.  349  m above sea level NHN
Height difference approx. 371 m
Bottom slope approx. 21 ‰
length 17.7 km 
(with nameless 20.3 km)
Catchment area 53.883 km²
Discharge at the Siedlinghausen2
A Eo gauge : 35.4 km²
Location: 9.6 km above the mouth
NNQ (08/15/1997)
MNQ 1980/2007
MQ 1980/2007
Mq 1980/2007
MHQ 1980/2007
HHQ (10/28/1998)
7 l / s
79 l / s
943 l / s
26.6 l / (s km²)
16.7 m³ / s
48.6 m³ / s

The Neger is a southwest or left tributary of the Ruhr in the North Rhine-Westphalian Hochsauerlandkreis ( Germany ). After a generally northward run of 17.7 km in length, it reaches a water flow of a good 1.3 m³ / s on average. The flow goes up on local locations and smaller portions in protected areas in the nature reserves reserve Hömberg / Bruse Becke / Eberg / Cold Spring , reserve Negro and Birautal , reserve Medium Negertal and reserve Negertal .



The Neger rises in the Rothaargebirge on the northwest flank of the Klappersberg ( 729.9  m ) at an altitude of 722  m above sea level. NHN in the nature reserve Hömberg / Brusenbecke / Eberg / Kalte Spring . Its source is about 1.5 km (as the crow flies ) northeast of Rehsiepen , a district of Schmallenberg . It flows exclusively in the Sauerland-Rothaargebirge nature park .

First the negro flows east. After a distance of around 1.5 km, the direction of the river turns south-west of Mount Frettloh ( 643.9  m above sea level ) abruptly to the north-east. At this point several short rivers flow, which the negroes flow from the slopes of the surrounding mountains. From then on, the Neger flows parallel to the state road  742. The valley suddenly widens to a wide trough valley with a kar-like valley head. The Gutmecke flows about 1.4 km downstream on the right , another 600 m later on the right, the Renau , which flows past the Jagdschloss Siedlinghausen shortly before its mouth . From a hydrographic point of view, it represents the main river, as it is not only longer but also 40% richer in water than the negroes. The Birau (Giers) , which comes from the Hunau massif and drains a trough valley over two hundred meters deep , joins the Mühlenhof on the left .

The first village on the Neger is Siedlinghausen . The Nameless (Lamelofe) , which rises northwest of Winterberg, flows here on the right. At 10.2 km in length, it is the longest Negro tributary and even longer than this at the point of mouth. Between Siedlinghausen and Brunskappel , the Hambkebecke flows out on the right , before the Negroes flow through a reservoir ( 428.9  m above sea level ) of the Steinhelle 1 power station . The Hartmecke flows into the southern outskirts of Brunskappel on the left . In the section between Brunskappel and Wulmeringhausen , several short watercourses flow on both sides, which flow off the slopes of the surrounding mountains. Between Wulmeringhausen and Steinhelle , a hamlet in the urban area of Olsberg , Fauleborn and Faules Siepen flow in on the left .

Finally , the Neger flows into Steinhelle between the mountains (height in meters above sea ​​level ; NHN) Steinhelle ( 612.7  m ; in the northwest), Schmalenberg ( 714.2  m ; in the west) and Wiedegge ( 732.3  m ; in the west-southwest) and Heidkopf ( 715.3  m ; in the east) on the left at 349  m in the Ruhr . About 60 m north below the mouth of the Negro, the L 742 meets the federal highway 480 .

At its mouth, the Neger carries around a sixth more water than the Ruhr as the main river by name and exceeds this by a good 8 km in length (with Renau). Between the source and the mouth, the Neger overcomes a 370 m difference in altitude, which corresponds to an average bed gradient of 20.9 ‰.


The most important tributary of the Negro is the 10.2 km long Nameless . With its 15.376 km² catchment area, it drains 28.5% of the negro area. The following are the tributaries of the Negroes in the order from the source to the mouth.

Surname Position
( km )
page Length
( km )
( km² )
Mouth height
( m above sea ​​level )
Gutmecke 14,799 right 2.4 1.364 534 276114-12
Renau 14.254 right 5.4 6.354 519 276114-14
Birau 13.107 Left 4.5 4,719 488 276114-2
Nameless ones 10.111 right 10.2 15.376 444 276114-4
Hammock pool 8.315 right 2.3   423 276114-92
Hartmecke 7.430 Left 0.8   411 276114-94
NN 7.184 right 1.1   409 276114-952
Fauleborn 1.186 Left 1.5   360 276114-96
Lazy sifting 0.760 Left 1.1   356 276114-98

A comparison of negroes and dysentery

Up to its confluence, the Neger (17.7 km, via Renau 19.1 km) is not only longer than the Ruhr (16.7 km, via Hille 17.7 km), but also has a slightly larger catchment area (53.883 km² vs. 52.977 km²). The mean runoff of the Negro is a good 1.3 m³ / s compared to a good 1.1 m³ / s of the Ruhr. Therefore, the Negro at the mouth is at least as important a body of water.

History and economy

The former village of Neger near Siedlinghausen was given up around 1550.

The Neger dam at Brunskappel with 44.5 million m³ of storage volume (low water regulation), which was planned from 1976 onwards , was not implemented, as was the later planned Renau dam above Siedlinghausen with a storage volume of 18 million m³ (drinking water).

Above Siedlinghausen and from Wulmeringhausen , the Neger is assigned to water quality class I-II, in between there is a stretch of quality class II. The structural quality is still impaired by several barriers.

Individual evidence

  1. a b c d German basic map (DGK 5) in Topographical Information Management, Cologne District Government, Department GEObasis NRW ( information )
  2. a b c d e Topographical Information Management, Cologne District Government, Department GEObasis NRW ( information )
  3. German hydrological yearbook Ruhr / Siedlinghausen2 2010  ( page no longer available , search in web archivesInfo: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice. (PDF, 14.6 kB)@1@ 2Template: Toter Link /  
  4. a b c Antje Giers: Forecast and assessment of the ecological consequences of hydraulic engineering measures using the example of a dam planning in the Hochsauerland Dissertation Ruhr University Bochum 2003 (Tab. 75, p. 262) (PDF; 2.69 MB)
  5. For a better overview and sorting downstream, a hyphen has been inserted for each river in the water code number (GKZ) after the number “276114”, which stands for the negroes .
  6. The brook marked as "Birau" on maps is declared as "Giers" in the water station.
  7. Data based on the Olsberg gauge. Archived from the original on July 30, 2012 ; accessed on August 8, 2016 . on the Ruhr below the mouth and Siedlinghausen 2  ( page no longer available , search in web archivesInfo: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice. @1@ 2Template: Toter Link /   at the Neger, whereby the area runoff of the intermediate catchment area is related to the catchment areas of the Ruhr above the confluence and the Neger below the water level catchment area Siedlinghausen 2 .
  8. Ruhrtalsperrenverein Essen: Without water there is no life! Die Negertalsperre In: Der Aufbau, H. 2, S. 53-56. Bremen 1979 (PDF: 10.42 MB)
  9. ^ Regional council Arnsberg: Area development plan district Soest and Hochsauerlandkreis , Arnsberg 1994, p. 242

Web links