Sulm (German river)
Encyclopedia
The Sulm is an unnavigable right tributary
Tributary
A tributary or affluent is a stream or river that flows into a main stem river or a lake. A tributary does not flow directly into a sea or ocean...

 of the Neckar
Neckar
The Neckar is a long river, mainly flowing through the southwestern state of Baden-Württemberg, but also a short section through Hesse, in Germany. The Neckar is a major right tributary of the River Rhine...

 in the Heilbronn district of Baden-Wuerttemberg. It arises in the Löwensteiner Mountains and after 25.3 km (15.7 mile
Mile
A mile is a unit of length, most commonly 5,280 feet . The mile of 5,280 feet is sometimes called the statute mile or land mile to distinguish it from the nautical mile...

s) and 315 meters (1033 feet) of elevation flows into the Neckar in Untereisesheim
Untereisesheim
Untereisesheim is a town in the district of Heilbronn in Baden-Württemberg in Germany....

, near Neckarsulm
Neckarsulm
Neckarsulm is a city in northern Baden-Württemberg, Germany, near Stuttgart, and part of the district Heilbronn. As of 2004, Neckarsulm had 27,296 inhabitants....

.

Geography

The Sulm flows south from the city Löwenstein
Löwenstein
Löwenstein is a town in the district of Heilbronn in Baden-Württemberg, Germany. It was first mentioned in 1123. The castle of Löwenstein served as a residence for the counts of Löwenstein-Wertheim. In 1634 the castle was destroyed by the imperial forces....

 at the edge of the Löwensteiner Mountains. At its origin, the Sulm is fed by several brooks, and which brook specifically constitutes the source is subject to interpretation. Several such brooks discharge into an artificially created retention basin
Retention basin
A retention basin is used to manage stormwater runoff to prevent flooding and downstream erosion, and improve water quality in an adjacent river, stream, lake or bay. Sometimes called a wet pond or wet detention basin, it is an artificial lake with vegetation around the perimeter, and includes a...

.

The retention basin is on the watershed between Sulm and Schozach
Schozach
Schozach is a river in Germany. It is a right tributary Neckar in the souther part of the Heilbronn district of Baden-Wuerttemberg. It has its source near Untergruppenbach - forecourt into Löwensteiner mountains...

 and has dams in both directions. It is fed with water that that further east, at 465 m above sea level, comes from rising book brook. It arrives into the retention basin and from this into the Sulm. according to one source the short piece of the retention pond discharge or even the whole upper book brook including Mühlgraben is regarded as Sulm (in this case the overall length of the river reaches 26.2 km).

Indisputablely the Sulm flows of from there. For a short distance, it travels under the area of the company Teusser verdolt (thus underground), at the edge of the Löwensteiner of quarter Teusserbad and to 1623 built surge tank, takes a sharp turn northward, then eastward past the Löwensteiner local part Rittelhof. With a sea-mill south of B 39, one surviving of the originally three Löwensteiner mills, it feeds 39 a Mühlsee. After crossing under the B 39, it forms the farmstead Beckershof nearby at approximately 222 metres (728.3 ft) above sea level. From 1975 to 1980 for reasons of the flood protection, 40 hectares of large detention basin
Detention basin
A detention basin is a stormwater management facility installed on, or adjacent to, tributaries of rivers, streams, lakes or bays that is designed to protect against flooding and, in some cases, downstream erosion by storing water for a limited period of a time. These basins are also called "dry...

 were artificially accumulated, which with his larger part already on Obersulm
Obersulm
Obersulm is a municipality in the district of Heilbronn, Baden-Württemberg, Germany, formed in the 1970-s as a merger of the formerly independent municipalities Affaltrach, Eichelberg, Eschenau, Sülzbach, Weiler, and Willsbach. It is situated 12 km east of Heilbronn...

, Gemarkung lies. Northwest from Obersulm Weiler the river drains from the lake and turns to the west.

Here it, coming from southeast, is led in the middle by the Weinsberger motorway interchange, in that itself A 6
Bundesautobahn 6
, also known as Via Carolina is a 477 km long German autobahn. It starts at the French border near Saarbrücken in the west and end at the Czech border near Waidhaus in the east....

 and A 81
Bundesautobahn 81
is a motorway in Germany. It branches off the A 3 at the Würzburg-West triangle and ends near the border to Switzerland.The oldest part of the A 81 between the Weinsberg intersection near Heilbronn and the Leonberg triangle near Stuttgart was finished in the years 1938 to 1940...

 meets. Here in former times the Weinsberger Benzenmühle broke off because of motorway construction 1971. The hare mill is received, to find to the Sulm, after this left the motorway interchange in the northwest. Already on Erlenbacher
Erlenbach, Baden-Württemberg
Erlenbach is a municipality in the district of Heilbronn in Baden-Württemberg in southern Germany.-Geography:Erlenbach lies at the foot of the 317 meter tall Kayberg in the lower Sulmtal in the eastern part of district of Heilbronn....

 area, but east the place, the concrete dam of a flood control storage basin is after the supply of the white yard brook.

At the southern local edge of Erlenbach and its local part being cheeks flows past the Sulm after northwest toward Neckarsulm
Neckarsulm
Neckarsulm is a city in northern Baden-Württemberg, Germany, near Stuttgart, and part of the district Heilbronn. As of 2004, Neckarsulm had 27,296 inhabitants....

. Here is a further floodcontrol storage basin. Starting from the city boundary the Sulm flows straightened in a park area, that 1975 Sulmtalpark put on. In former times different mills were along their run on Neckarsulmer area. The close mill which was directly because of the city boundary was broken off 1988. Starting from here the Sulm ran in former times in a far elbow first northward, then to the west by the work area NSU of engine works
NSU Motorenwerke AG
NSU Motorenwerke AG, normally just NSU, was a German manufacturer of automobiles, motorcycles and pedal cycles, founded in 1873. It was acquired by Volkswagen Group in 1969...

. After two floods in the year 1970 the river was verdolt 1973 to 1975. It runs since then over 2.6 km underground and meets in the north of the Neckarsulmer Gemarkung, at the border to bath Friedrichshall, on (in this section) the 1925 finished Neckarkanal. There the Sulm is passed through directly following the Dole with one Culvert
Culvert
A culvert is a device used to channel water. It may be used to allow water to pass underneath a road, railway, or embankment. Culverts can be made of many different materials; steel, polyvinyl chloride and concrete are the most common...

 under the channel. She is to be seen deeper in a maintenance building again several meters briefly before.

On the west side of the Neckarkanals shows up it on "the island" between channel and Altneckar again and forms here for instance 250  m the border between bath Friedrichshall and Untereisesheim
Untereisesheim
Untereisesheim is a town in the district of Heilbronn in Baden-Württemberg in Germany....

, before it finally opposite of Untereisesheim on 148 m over NN in the Neckar flows.

Catchment

The water catchment area of the Sulm covers 111 km² and limited by the watersheds to Brettach in the north and the east, Schozach
Schozach
Schozach is a river in Germany. It is a right tributary Neckar in the souther part of the Heilbronn district of Baden-Wuerttemberg. It has its source near Untergruppenbach - forecourt into Löwensteiner mountains...

 in the southwest and Murr in the southeast.

The most important supplies (with the place of their inlet) are on the right side: Schlierbach (in Obersulm Affaltrach), Michelbach (in Affaltrach), Seebächle (in Obersulm Willsbach), Sülzbach (in Obersulm Sülzbach), white yard brook (called at the beginning of Eberbach, above Erlenbach). On the left side: Hambach (in Obersulm Willsbach), Ellbach (in Ellhofen), city sea or sow brook and/or Weinsberger brook (in Erlenbach).
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