Long wave (Schunter)

from Wikipedia, the free encyclopedia
Long wave
Mittelgraben, Großer Graben
View to Elz am Elzweg in Helmstedt, Großer Graben or Lange Welle cross under the path, direction of flow to the right.

View to Elz am Elzweg in Helmstedt, Großer Graben or Lange Welle cross under the path, direction of flow to the right.

Data
Water code DE : 48282
location Germany
Lower Saxony
District of Helmstedt
River system Weser
Drain over Schunter  → Oker  → Aller  → Weser  → North Sea
source Great ditch in Helmstedt
52 ° 12 ′ 54 ″  N , 11 ° 2 ′ 4 ″  E
Source height 140  m above sea level NHN
muzzle Süpplingenburg coordinates: 52 ° 15 '12 "  N , 10 ° 53' 58"  E 52 ° 15 '12 "  N , 10 ° 53' 58"  E
Mouth height 99  m
Height difference 41 m
Bottom slope 3.5 ‰
length 11.7 km
Catchment area 66.54 km²
Left tributaries Gittelbergbach
Right tributaries Mühlengraben, Brunsolgraben
Medium-sized cities Helmstedt
Communities Süpplingenburg
Water body NLWKN : 15056
The long wave or the middle ditch north of Süpplingenburg shortly before the confluence with the Schunter.

The long wave or the middle ditch north of Süpplingenburg shortly before the confluence with the Schunter.

The Lange Welle is an 11.7 km long creek in the Helmstedt district in Lower Saxony , which rises in Helmstedt am Lappwald as Großer Graben and, after a predominantly north-westerly course, flows from the right as Mittelbach into the Schunter near Süpplingenburg .

geography

course

The Große Graben rises on the western edge of the Lappwald in the southern part of the city of Helmstedt near the Magdeburger Tor and Bundesstraße 1 . It flows mainly in a westerly direction, unites on the northern edge of the Lappwaldsee with other streams from the open-cast mining area and the Elz, and now turns as a long wave in the depression between Lappwald and Elz to the northwest. It passes under the railway line to Braunschweig , the Elzweg and the B1. At Emmerstedt it takes up the Mühlengraben coming from the right from the Helmstedt urban area . The Brunsolgraben flows in between Emmerstedt and Süpplingenburg, draining the northern area of ​​the Lappwald and contributing around a third to the catchment area of ​​the Lange Welle. A few hundred meters further, the stream branches into the northern flow ditch and the more water-rich central ditch , which turn westwards below the dorm . Both arms flow northwest of Süpplingenburg near the clarification ponds into the Schunter.

designation

The designation as a long wave is not uniform in the official documents: In the official map of the Lower Saxony state survey, it only receives its name below the inflow of the Mühlengraben, in the topographic map 1:25 000 by the same author, however, already in the area of ​​the Elzweg. This is where the name Großer Graben is used. In the water quality report of 2002, the confluence of the Großer Graben and Mühlengraben is referred to as the source point. The Weser area directory names the GKZ 48282 body of water with “Mittelgraben in the upper reaches of the Großer Graben and Lange Welle” and assigns it a catchment area of ​​61.92 m². The information in the info box comes from the so-called C-report of the federal states to the European Community within the framework of the EU Water Framework Directive , in which the body of water is referred to as a "long wave (middle ditch)". The long wave with large ditch and middle ditch is listed under the water body number 15056 for water monitoring by the responsible state company.

Water quality

In the current evaluation overview of the supervising state company, the long wave is classified as a "significantly changed running water" with "unsatisfactory potential". The reason for this is certainly the straight, developed and canal-like course as well as the natural bank design with fields reaching up to the embankment. According to the quality report from 2002, the water quality is essentially influenced by the flow from the Helmstedt sewage treatment plant into the Mühlengraben.

Web links

Commons : Long Wave  - collection of images, videos and audio files

Individual evidence

  1. ↑ a b LGLN : Topographic Map 1: 50,000 , as of 2000, CD-ROM Top50 Viewer
  2. ↑ a b c NLWKN : Inventory of the implementation of the EC Water Framework Directive, Oker processing area , Braunschweig November 2004, Table 3.
  3. ↑ GeoLife. (No longer available online.) Archived from the original on March 19, 2015 ; accessed on March 14, 2015 . 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.  @1@ 2Template: Webachiv / IABot / navigator.geolife.de
  4. ↑ NLWKN : Water quality report Oker 2002 , Braunschweig October 2002, p. 72 ff., Section long wave
  5. ↑ NLWKN : Area directory for the Lower Saxony Hydrographic Map , as of 2010, p. 64. FV_Weser.pdf, accessed on Umwelt.niedersachsen.de on August 19, 2013.
  6. ↑ Evaluation results for surface and groundwater. (PDF) NLWKN , February 2017, p. 1 , accessed on May 29, 2017 .