Aar (dill)
| Aar | ||
 Aarbrücke near Herborn-Seelbach |
||
| Data | ||
| Water code | DE : 25846 | |
| location |
Westerwald
|
|
| River system | Rhine | |
| Drain over | Dill → Lahn → Rhine → North Sea | |
| source | south of Hohenahr -Erda 50 ° 39 '26 " N , 8 ° 32' 21" O |
|
| Source height | approx. 331 m above sea level NHN | |
| muzzle | at Herborn-Burg in the Dill coordinates: 50 ° 41 ′ 52 " N , 8 ° 18 ′ 28" E 50 ° 41 ′ 52 " N , 8 ° 18 ′ 28" E |
|
| Mouth height | approx. 210 m above sea level NHN | |
| Height difference | approx. 121 m | |
| Bottom slope | approx. 5.9 ‰ | |
| length | 20.6 km < | |
| Catchment area | 148.756 km² | |
| Discharge A Eo : 148.756 km² at the mouth |
MNQ MQ Mq |
136.2 l / s 1.602 m³ / s 10.8 l / (s km²) |
| Left tributaries | Großenbach, Stadterbach , Gellenbach, Gettenbach, Ballersbach, Dernbach | |
| Right tributaries | Brühlsbach, Wilsbach , Weidbach, Meerbach, Siegbach , Weibach , Essenbach, Monzenbach | |
| Reservoirs flowed through | Aartalsee | |
| Medium-sized cities | Herborn | |
| Communities | Hohenahr , Bischoffen , Mittenaar | |
The Aar is a 20.6 km long, eastern and thus left tributary of the Dill , located entirely in the Lahn-Dill district . It rises in the source rivers Ahrbach ( Brühlsbach , north) and Erdaer Bach (south), which flow together north of Erda (municipality of Hohenahr ), and flows into the Dill in Herborn - Burg .
Surname
In the area of the old Biedenkopf district (today the municipality of Bischoffen), the Aar was written with an "h" - Ahr - up to the Gellenbachmühle (three-country mill west of Bischoffen), only from this old border was it called Aar in the former Dill district . The border between the Grand Duchy of Hesse- Darmstadt and the Duchy of Nassau ran here until 1866 . After the Austro-Prussian War lost for both states in 1866 , the area was annexed by Prussia and added to its province of Hesse-Nassau .
geography
course
The Aar runs in the Gladenbacher Bergland ( Lahn-Dill-Bergland Nature Park ) largely from east to west. Its upper course up to the Aartalsee lies in the natural area Niederweidbacher Becken (320.13), which is largely defined by the catchment area of the river and its tributaries. Before the lake, the Aar flows from the left, the Großenbach , coming from Großaltenstädten , and the Stadterbach to and immediately at the beginning of the lake at Mudersbach, from the right, the Wilsbach .
In the course of the Aarsee, the Aar flow into the Weidbach and Meerbach tributaries from the right . The river leaves the municipality of Hohenahr (Mudersbach in the south-east and Ahrdt in the mid-west) and enters the municipality of Bischoffen ( Niederweidbach in the north-east and Bischoffen itself in the far north-west and thus at the outflow of the lake). Still in Bischoffen, but outside the reservoir, the most important right tributary Siegbach flows from the north.
From now on, the Aar will roughly form the border between the natural areas Zollbuche (320.03) and, further to the west, the Schelder Forest (320.02) in the north and Hörre (320.4) in the south. After the tributary of the Gellenbach from the left, the districts Offenbach , Bicken and Ballersbach of the Mittenaar community flow through one after the other . The tributaries of the Weibach from the north (= right) and Gettenbach from the south (= left) flow into Bicken .
Finally, the Aar flows through the Herborn districts of Seelbach (tributary of the Essenbach from the right, then the Dernbach from the left and the Monzenbach from the right) and Burg , where it finally reaches an altitude of about 210 m above sea level. NHN flows into the dill from the left.
The 20.6 km long course of the Aar ends about 121 meters below its source, it has an average bed gradient of about 5.9 ‰.
Catchment area
The catchment area of the Aar lies in the natural spatial main units Gladenbacher Bergland and Dilltal of the main unit group Westerwald . It drains it over the Dill, the Lahn and the Rhine to the North Sea .
Your catchment area borders
- in the northeast and east to that of the salt flats , a tributary of the Lahn
- in the southeast to that of the Lahn tributary Bieber
- in the south to that of the Blasbach and the Lemp . both tributaries of the dill
- in the northwest to that of the Scheldt , also a dill tributary
- and in the north to that of the Lahn tributary Perf .
In the mountainous areas of the catchment area, contiguous forest areas dominate and in the lowlands between Bischoffen and the estuary along the floodplain , meadows and arable land predominate.
Tributaries
The Upper Aar , which is calculated up to the inflow of the Wilsbach, at the beginning of the Aartalsee , has a discharge of 470 l / s with a catchment area of 42.744 km², which is comparatively evenly distributed over Stadterbach (16.767 km²), Aar (12.48 km² in front of the Stadterbach estuary) and Wilsbach (12.342 km²). Weidbach and Meerbach make a significantly smaller contribution to the reservoir.
The Siegbach is by far the largest tributary and is the only river after a source course in the Bottenhorn plateau in the north to cross the Zollbuche ridge , in which various northern tributaries of the upper reaches also have their source.
All the eastern and southern tributaries of the Aartalsee, on the other hand, have their source either in the Niederweidbach basin itself or on the northern edge of the Krofdorf-Königsberger forest adjoining to the south .
The lower course feeds through the Scheldt forest in the north and the Hörre in the south.
The following tributaries flow into the Aar:
| Surname |
Inflow side |
Length [km] |
Catchment area [km²] |
Inflow on Aar-km |
Mouth height [m. ü. NN] |
Source natural space |
DGKZ |
|---|---|---|---|---|---|---|---|
| Bruehlsbach | right | 3.3 | 4,741 | 3.3 | 282 | eastern Niederweidbach basin | 25846-12 |
| Stadterbach | Left | 6.6 | 16.767 | 5.3 | 272 | north of Krofdorf-Königsberger Forest | 25846-14 |
| Wilsbach | right | 6.3 | 12,342 | 6.1 | 268 | northeast Niederweidbach basin | 25846-2 |
| Weidbach | right | 5.9 | 7.107 | 7.4 | 268 | centr. Customs beech | 25846-32 |
| Meerbach | right | 5.2 | 5.867 | 8.4 | 268 | centr. Customs beech | 25846-39 |
| Siegbach | right | 12.2 | 28.665 | 9.5 | 260 | centr. Bottenhorn plateaus | 25846-6 |
| Gellenbach | Left | 4.2 | 8,923 | 10.3 | 252 | centr. western Niederweidbach basin | 25846-72 |
| Weibach | right | 6.3 | 10.033 | 14.5 | 234 | Scheldt forest | 25846-8 |
| Gettenbach | Left | 3.6 | 5.701 | 14.5 | 234 | Eastern Hörre | 25846-92 |
| Ballersbach | Left | 3.2 | 15.9 | 228 | centr. Listen | 25846-934 | |
| Essenbach | right | 3.3 | 17.6 | 223 | south of the Scheldt Forest | 25846-952 | |
| Dernbach | Left | 2.7 | 18.5 | 216 | western hear | 25846-958 | |
| Monzenbach | right | 4.5 | 19.1 | 214 | south of the Scheldt Forest | 25846-992 |
Pollution
In January 2008, the Aar was heavily polluted by antibiotics that came from a chicken farm on the Aartalsee. In the meantime, however, the Aar is biologically fine again.
traffic
The federal road 255 follows - seen upstream - in its course from Herborn towards Gladenbach first of the valley of the Aar, from Niederweidbach then that of the Weidbach, in order to finally cross the watershed between Aar and Salzböde at the Zollbuche . After a serpentine stretch, it reaches the Salzböde at Weidenhausen (Gladenbach) , follows it downstream to Erdhausen and then runs from Gladenbach to Niederweimar on the watershed between the Allna in the north and the southern Lahn tributaries (from west to east) Salzböde, Walgerbach and Wenkbach .
The disused since 2001 Aar Salzböde train followed, also first seen upstream, the opposite from Bischoffen the course of Siegbach to between Eisemroth and Hartenrod to overcome the divide between Aar and (Upper) Salzböde in a tunnel and then on the Salzböde downriver to consequences.
In the Middle Ages, around the end of the 14th century, an important long-distance trade route ran in the Aar Valley, namely the younger southern route of the Herborn-Marburg section, the Cologne-Leipziger-Messestrasse, also known as Brabanter Strasse . Its main route previously ran over the Bottenhorn plateau through the Schelder Forest , past the Angelburg (mountain) towards Siegen .
Since 2006, a bypass road for the Herborn districts of Burg and Seelbach has been built along the mouth of the Aar. The bypass road and the Seelbach-Ost exit were opened to traffic on April 2, 2009. On April 17, 2009 the bypass and the Seelbach-West exit were officially opened.
Individual evidence
- ↑ a b Topographic map 1: 25,000
- ↑ a b c d e Water map service of the Hessian Ministry for the Environment, Climate Protection, Agriculture and Consumer Protection ( information )
Web links
- Aerial view of the Aar with its reservoir and tributaries
- Hessian State Office for Environment and Geology: retention cadastre, river basin Aar - river basin code number: 25846 (PDF; 3.62 MB) ( Notes )
- Map / aerial photo of the Aar river system
- Water profile and program of measures 25846.3 ( Memento from January 1, 2013 in the web archive archive.today ) ( Notes ) → Overview of all Hessian river systems (PDF, 1.7 MB) Obere Aar
- Water profile and program of measures 25846.2 ( Memento from January 1, 2013 in the web archive archive.today ) ( Notes ) → Overview of all Hessian river systems (PDF, 1.7 MB) Aar / Talsperre
- Water profile and program of measures 25846.1 ( Memento from January 1, 2013 in the web archive archive.today ) ( Notes ) → Overview of all Hessian river systems (PDF, 1.7 MB) Lower Aar