The Breg is a river, 46 kilometres long, in
Baden-Württemberg
Baden-Württemberg (; ), commonly shortened to BW or BaWü, is a German state () in Southwest Germany, east of the Rhine, which forms the southern part of Germany's western border with France. With more than 11.07 million inhabitants across a ...
,
Germany
Germany, officially the Federal Republic of Germany (FRG),, is a country in Central Europe. It is the most populous member state of the European Union. Germany lies between the Baltic and North Sea to the north and the Alps to the sou ...
, and the primary headstream of the
Danube
The Danube ( ; ) is a river that was once a long-standing frontier of the Roman Empire and today connects 10 European countries, running through their territories or being a border. Originating in Germany, the Danube flows southeast for , ...
.
Description
The '' Breg '' is the longest and biggest headstream of the
River Danube. It flows through the southeast part of the
Middle Black Forest and the lowlands of the
Baar region.
The Breg rises at a height of , six kilometres northwest of
Furtwangen. Its
source, which is near
St. Martin's Chapel and is also called the
source of the Danube or ''Donauquelle'', is protected as a
natural monument. It is located about 100 metres south-east of the Rhine / Danube
watershed
Watershed is a hydrological term, which has been adopted in other fields in a more or less figurative sense. It may refer to:
Hydrology
* Drainage divide, the line that separates neighbouring drainage basins
* Drainage basin, called a "watershe ...
(the great
European Watershed). Beyond that, but only about 900 metres away is the source of the
Elz, which flows in the same longitudinal
valley
A valley is an elongated low area often running between hills or mountains, which will typically contain a river or stream running from one end to the other. Most valleys are formed by erosion of the land surface by rivers or streams over ...
but initially in the opposite direction, to the north, and later flows into the
Rhine
The Rhine ; french: Rhin ; nl, Rijn ; wa, Rén ; li, Rien; rm, label=Sursilvan, Rein, rm, label=Sutsilvan and Surmiran, Ragn, rm, label=Rumantsch Grischun, Vallader and Puter, Rain; it, Reno ; gsw, Rhi(n), including in Alsatian dialect, Al ...
.

In its upper section, known as the ''Katzensteig'', the Breg valley is clearly a result of glaciation, with a strikingly low gradient and landscape characterized by large
Black Forest houses. Between the towns of Furtwangen and Vöhrenbach, the Breg flows eastwards through a broader and somewhat more densely populated valley, then in a generally southeasterly direction through a solitary forest valley, accompanied by a road and the route of the former
Breg Valley Railway, which is now a bicycle track. Shortly before Hammereisenbach-Bregenbach, the Breg is joined by the Linach just below the
Linach Dam and, in the village, by the
Hammerbach, a short tributary, but the most important thanks to its two large headstreams. Near
Bräunlingen, the Breg meets the Röthenbach stream at the
Kirnbergsee. Here the Breg leaves the Black Forest and continues via
Hüfingen to
Donaueschingen, through wide, open countryside on the plateau of the Baar.
After 46.2 kilometres, the Breg merges with the
Brigach in Donaueschingen to form the Danube - ''"Brigach und Breg bringen die Donau zuweg"'' ("Brigach and Breg bring the Danube together") as the well known rhyme goes. Since the Breg is not only the longest, but also the most voluminous river of the Danube with a
catchment area
In human geography, a catchment area is the area from which a location, such as a city, service or institution, attracts a population that uses its services and economic opportunities. Catchment areas may be defined based on from where people ar ...
of 291.5 km², its source is considered hydrographically as the source of the Danube (''Donauquelle'').
Tributaries
:This list only shows the more important tributaries. For the full list see
:de: Liste der Zuflüsse der Breg
* Schützenbach (left)
*
Hintere Breg (right)
* Rohrbach (left)
* Langenbach (left)
* Linach (right)
*
Hammerbach (right) with the upper reaches of the
Eisenbach and
Urach
* Forbach (left)
* Kohldobelbächle (left)
*
Reichenbächle (right)
* Weiherbach (left)
* Landgraben (right)
* Röthenbach (right)
References
[Length based on the ''Gewässernetz ( AWGN)'' layer of the online map server of the LUBW.]
[Catchment totalled from the ''Aggregierte Gebiete 05 (AWGN)'' layer of the online map server of the LUBW.]
External links
*
Catchment of the Bregon the map services of the LUBW
{{Danube
Rivers of Baden-Württemberg
Danube
Rivers of the Black Forest
Rivers of Germany