|Location||Ravensburg and Bodenseekreis in Baden-Württemberg|
|• location||Confluence of Untere Argen and Obere Argen, between Neukirch and Neuravensburg|
|• elevation||496 m (1,627 ft)|
|Into Lake Constance between Kressbronn am Bodensee and Langenargen|
|395 m (1,296 ft)|
|Length||23.2 km (14.4 mi) (with Obere Argen 73.2 km or 45.5 mi)  |
|Basin size||654 km2 (253 sq mi)  |
|• average||20.5 m3/s (720 cu ft/s)|
|Progression||Lake Constance→ Rhine→ North Sea|
The Argen is a river in Baden-Württemberg, Germany. It flows into Lake Constance between Kressbronn am Bodensee and Langenargen as the third largest tributary to the lake. It is 23.4 kilometres (14.5 mi) long; if one includes the Obere Argen and its source river Seelesgraben, the combined length is 73.2 kilometres (45.5 mi).
The headwaters of the Argen rise in the Allgäu. There are two headwaters: the Obere Argen and the Untere Argen. The two arms wrap around the Große Kreisstadt of Wangen im Allgäu and meet each other in the Neuravensburg district of Wangen im Allgäu.
The origin of the Untere Argen is the confluence of Börlasbach and Stixnerbach at the western entrance to Missen at about 850 metres (2,790 ft) above sea level in the Allgäu region of Bavaria. From the confluence, it first flows north to Isny im Allgäu, then northwest to Waltershofen, then southwest to Primisweiler. Past Primisweiler, it merges with the Obere Argen.
The main tributaries are the Wengener Argen and the Haslach.
The Federal highway A96 crosses it a number of times.
The Obere Argen originates in a marshy area north-west of Oberstaufen in the Allgäu and initially flows through a gorge named Eistobel, then underneath the Argentobelbrücke, then past Grünenbach towards Wangen im Allgäu. From there it goes on via Neuravensburg to Pflegelberg, where it is united with the Untere Argen.
Geomorphologically, the Argen has cut a deep and wide valley into the landscape, which has led to place names such as Gitzensteig. In some place, the valley is over a kilometer wide. The edges of the valley rise steeply up to 100 metres (330 ft) in places, and the valley floor is at the level of Lake Constance.
Further down its course, the river bed becomes increasingly broad. The river here flows past the villages of Laimnau, Apflau and Badhütten. In the lower part of its course, the Argen was straightened considerably. Oxbow lakes no longer exist because of the intensive agriculture of the valley. In recent years at least the massive concrete walls alongside the river have been replaced in most of the shallower zones by large stones. Near the estuary at Kressbronn, gravel will be mined in larger quantities, creating new lakes along the river.
The ruins of several castles and palaces flank the lower reaches of the Argen: Altsummerau, Neusummerau, the late medieval Gießen Castle at Kreisbrunn, Achberg Castle and Neuravensburg Castle. Remains of an ancient hill fort can be found in the woods above the river.
The mouth into Lake Constance is flanked on both sides with ports or pleasure boats. On the left is a camping grounds name Gohren. Another camping grounds can be at Laimnau, next to a restaurant. Further leisure facilities can be found in this area.
At its mouth, the Argen is 30 metres (98 ft) wide, which is fairly wide for such a short river. Depending on the weather, is may have a large discharge as well. To defend against floods, protective walls have been constructed along the river.
Kayaking is possible; bathing facilities are available.
About 200 metres (660 ft) below the Gießenbrücke bridge in Kressbronn (river km 5.8), a water level measuring station exists on the Kresbronn side of the river. It is operated by the "Flood Forecasting Center Baden-Württemberg" and the "State Institute for Environment, Measurements and Nature Conservation Baden-Württemberg". It is operated by the Regierungsbezirk Tübingen. The zero level for this station is at an elevation of 420.13 metres (1,378.4 ft).
- Mean lowest water level 1980–2003: 0.29 metres (0.95 ft), 4.87 cubic metres per second (172 cu ft/s)
- Average water level in the years 1980–2003: 0.57 metres (1.9 ft), 20.50 cubic metres per second (724 cu ft/s)
- Historical record levels, flooding on 22 May 1999: 3.58 metres (11.7 ft)
An area of approximately 296 hectares (730 acres) flanking the Argen was declared a nature reserve by the regional council of Tübingen on 16 December 1997. Its official name is Naturschutzgebiet Argen and it is registered as reserve number 4282. The reserve covers the area between the confluence of the Obere and Untere Argen and the mouth into Lake Constance. It includes the river, including the steep slopes, floodplain forest and swamp forests, valleys and flood embankments. Of the total, 234.8 hectares (580 acres) of the reserve are in the Bodenseekreis district and 61.54 hectares (152.1 acres) in the Ravensburg district.
The roads along the Argen between Argensteg and Gießenbrücke are used in the annual Bodensee-Marathon. Runners must run on the road on the Kresbronn side to Gießenbrücke, then cross the bridge and run along the river on the Langenargen side to Argensteg, then via Gohren to the finish at Kressbronn Lakeside Sports Hall.
Bridge at Achberg Castle
References and sources
- Norbert Kruse: Die Argen und ihre Namen, in: Im Oberland, issue 2, 2002, pp. 55–64
- Hermann Vogelmann (1988), Die Argen. Von den Quellen bis zur Mündung, Eppe, ISBN 3-89089-009-1
- Complete table of the Bavarian Waterbody Register by the Bavarian State Office for the Environment (xls, 10.3 MB)
- Map services of the Baden-Württemberg State Office for the Environment, Survey and Conservation (Landesanstalt für Umwelt, Messungen und Naturschutz Baden-Württemberg)
|Wikimedia Commons has media related to Argen.|
- Pictures around the Argen
- Data from the level measuring station below Gießen Bridge
- Vibrational modes of the suspension bridge over the Argen at Achberg