Walbach (Agger)

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Walbach
Data
Water code DE : 272852
location Germany
River system Rhine
Drain over Agger  → Sieg  → Rhine  → North Sea
source at Wallefeld
51 ° 1 '2 "  N , 7 ° 28' 36"  E
Source height approx.  255  m above sea level NHN
muzzle in Ründeroth in the Agger coordinates: 50 ° 59 '14 "  N , 7 ° 27' 17"  E 50 ° 59 '14 "  N , 7 ° 27' 17"  E
Mouth height approx.  132  m above sea level NHN
Height difference approx. 123 m
Bottom slope approx. 24 ‰
length 5.1 km
Catchment area 6.581 km²
Discharge
A Eo : 6.581 km²
at the mouth 		MNQ
MQ
Mq
 		16.12 l / s
168.66 l / s
25.6 l / (s km²)

The Walbach is a 5.1 km long, northern and right tributary of the Agger in Ründeroth in the North Rhine-Westphalian Oberbergischer Kreis .

geography

course

The source of the Walbach, which flows entirely in the Bergisches Land Nature Park, is on the north-eastern edge of Wallefeld at around 255  m above sea level. Above sea level. Initially, the  stream , which always flows along state road 307, runs southwest through Wallefeld. It then passes Remerscheid in the east, running south . Shortly afterwards the Walberbach flows into it and a little later, when you pass Müllensiefen to the west, the small Müllensiefen - both on the left.

In the Hardt , which then flows through , the Walbach approaches the Agger, which flows through Ründeroth , up to about 100 m; there it is only separated from its estuary by a low rise. Then the brook turns to the west and flows around the Mühlenberg ( 254.3  m ) in the north and, after the confluence of the Schnellenbach on the right , west. Below the village of Hardt, it passes the Aggertal Cave in the east, which is unique in the country .

Then the Walbach reaches the south-western part of Ründeroth, where it flows under the L  136, opposite the locality of Ohl at about 132  m above sea level in the north-eastern Sieg- tributary Agger. The brook has a geological and hydrological peculiarity with two mouths: Due to a dwindling stream , it has an underground mouth which is located in Ründeroth near the hut gardens; a little downstream there is its aboveground mouth opposite Ohl. The subterranean part passes under the Mühlenberg, in which the “ Windloch im Mühlenberg ” cave is also located.

On the 5.1 km long path from the source to the mouth, the Walbach overcomes a height difference of 123 m, which corresponds to a mean bed gradient of 24.1 ‰.

Tributaries

  • Walberbach ( left ), 1.3 km
  • Müllensiefen ( left ), 1.3 km
  • Schnellenbach ( right ), 1.0 km

Individual evidence

  1. ↑ a b German basic map (DGK 5) in Topographical Information Management, Cologne District Government, Department GEObasis NRW ( information )
  2. ↑ a b c Topographical Information Management, Cologne District Government, Department GEObasis NRW ( information )
  3. ↑ Modeled discharge values according to the specialist information system ELWAS, Ministry for Climate Protection, Environment, Agriculture, Nature and Consumer Protection NRW ( notes )
  4. ↑ a b Entry on stream shrinkage of the Walbach near Ründeroth in the database " KuLaDig " of the Rhineland Regional Association , accessed on August 7, 2017.