View source for Rench

{{Short description|River in Germany}}
{{Rough translation|1=German|listed=yes|date=February 2024}}
{{No footnotes|date=February 2024}}
{{Use dmy dates|date=February 2024}}
{{Infobox river<!-- de:Template:Infobox Fluss -->
| name = Rench
| map = Rench.png
| map_size = 
| map_caption = Course of the Rench ([http://u.osmfr.org/m/392482/ interactive map])
| image = Renchdamm.jpg
| image_size = 
| image_caption = The Rench dyke near [[Lautenbach (Ortenaukreis)|Lautenbach]]
| subdivision_type1 = Country 
| subdivision_name1 = [[Germany]]
| subdivision_type2 = [[States of Germany|State]]
| subdivision_name2 = [[Baden-Württemberg]]
| subdivision_type3 = Reference no.
| subdivision_name3 = DE:&nbsp;2354
| length = {{convert|57.1|km|abbr=on}} {{GeoQuelle|DE-BW|LUBW}}
| width_avg = 
| depth_avg = 
| source1_location = at [[Kniebis]] near [[Bad Griesbach im Schwarzwald]]-[[Zuflucht (Black Forest)|Zuflucht]] <small>[[source (river)|source]] ''Schöngrundbächle''</small>
| source1_coordinates = {{Coord|48.4908639|08.2469944|type:river_region:DE-BW|format=dms|display=inline,title}}
| source1_elevation = ca.&nbsp;{{Höhe|915|DE-NN|link=true }}
| mouth_location = at Rhine km 314.700, near [[Rheinau (Baden)|Rheinau]]/[[Lichtenau (Baden)|Lichtenau]]/[[Helmlingen]] into the [[Rhine]]
| mouth_coordinates = {{Coord|48.7226583|7.9665861|type:river_region:DE-BW|format=dms|display=inline}}
| mouth_elevation = 123&nbsp;m
| basin_population = 88650<ref>Regierungspräsidium Freiburg: TBG Begleitdokumentation Acher-Rench (33), Freiburg i. Br. 2009.</ref>
| basin_landmarks = {{ubl|Small towns: [[Oppenau]], [[Oberkirch (Baden)|Oberkirch]], [[Renchen]]|Villages: [[Bad Peterstal-Griesbach]], [[Lautenbach (Ortenaukreis)|Lautenbach]], [[Erlach (Renchen)|Erlach]]}}
| progression = {{RRhine}}
| basin_size = {{convert|305.1|km2|abbr=on}} {{GeoQuelle|DE-BW|LUBW}}
| discharge1_location = <ref>Regierungspräsidium Freiburg: TBG Begleitdokumentation Acher-Rench (33), Tab. A 7.2.1, Freiburg i. Br. 2009 (converted from m³/a).</ref>
| discharge1_min = 
| discharge1_avg = 8.37&nbsp;m³/s
| discharge1_max = 
| tributaries_right = [[Lierbach]], [[Acher]] (Teilmenge)
| tributaries_left = Ödsbach, Hesselbach
| waterbodies = 
| ports = 
| bridges = 
| custom_label = References
| custom_data = 
| extra = 
}}
The '''Rench''' is an eastern tributary of the [[Rhine]] in the [[Ortenau]] in [[Baden (Land)|Central Baden]], [[Germany]]. It rises on the southern edge of the [[Northern Black Forest]] at [[Kniebis]] near [[Bad Griesbach im Schwarzwald]]. The source farthest from the mouth is that of the ''Schöngrundbächle'' which rises at a height of around {{Höhe|915|DE-NN}} in the parish of [[Zuflucht (Black Forest)|Zuflucht]]. After flowing through its steep mountainside ''[[klinge_(landform)|klinge]]'' it is joined by other streams to form, first, the Old (''Alter''), then the Wild Rench (''Wilder Rench''), which first becomes the Rench below Bad Griesbach. The Rench runs in a prominent southerly arc through the [[Central Black Forest]] and crosses the hilly region of Ortenau with its orchards and vineyards before breaking out into the Rhine Plain. After just under 57&nbsp;km it, together with the [[Mühlbach (Rench)|Mühlbach]], [[confluence|confluences]] with the Rhine at 314.7&nbsp;km between [[Helmlingen]] ([[Rheinau (Baden)|Rheinau]]) and [[Lichtenau (Baden)|Lichtenau]].

The upper Rench valley around [[Bad Peterstal-Griesbach]] initially cuts into the forested [[bunter sandstone]] plateau before entering a more open, very steep rugged valley, near the town of [[Oppenau]]. There it is joined from the east by the [[Lierbach]], well known for the [[All Saints Waterfalls]].
In [[Lautenbach (Ortenaukreis)|Lautenbach]] the valley abruptly broadens into the [[Foothill zone (Upper Rhine Graben)|Foothill Zone]] with the town of [[Oberkirch (Baden)|Oberkirch]] at the foot of the vineyards and the little town of [[Renchen]].

The [[Bundesstraße 28|B&nbsp;28]] federal road, long an important route through the Black Forest, runs through the Rench valley linking the [[Strasbourg]] area with the upper [[Neckar]] region. It climbs steeply above Bad Griesbach in hairpin bends to the [[Alexanderschanze]] (968&nbsp;m). The [[Rench Valley Railway]] starts at [[Appenweier]] and runs as far as [[Bad Griesbach im Schwarzwald|Bad Griesbach]]. It has also contributed to the development of the thermal baths in the Rench valley, which had already been established in the 16th century in Bad Griesbach, but which soon extended to Bad Antogast near Oppenau (especially for the nobility), Bad Peterstal and Bad Freiersbach (today part of Bad Peterstal-Griesbach).

The "Rench Flood Canal" was built between 1936 and 1953 at the [[Acher Rench Correction]] to divert floodwaters. It branches off the Rench at [[Erlach (Renchen)|Erlach]], picks up the [[Acher]] Canal at Rheinau and merges with the actual Rench at [[Memprechtshofen]].

== Gallery ==
<gallery>
File:Rench river in Oppenau.JPG|The Rench in Oppenau
File:Rench Helmlingen 2.jpg|The Rench near [[Helmlingen]] at low water
File:Rench Helmlingen.jpg|The Rench in riparian woods near Helmlingen
File:Renchmündung.jpg|Confluence of the Rench and the Rhine
</gallery>

== See also ==

* [[Rench Valley Trail]]
* [[Rench Valley Railway]]
* [[Rench (name)]]

== References ==
{{Reflist}}

== External links ==
{{Commons category}}
* "LUBW-BRSWEB": {{GeoQuelle|DE-BW|LUBW|ref=nein}}
* {{GeoQuelle|DE-BW|GeoView|ref=nein}}, especially the map sections and layers
** the [[Landesanstalt für Umwelt, Messungen und Naturschutz Baden-Württemberg|Landesanstalt für Umwelt, Messungen und Naturschutz Baden-Württemberg (LUBW)]]
*** "LUBW-FG10": Rivers, 1:10,000 scale
*** "LUBW-SG10": Lakes and reservoirs, 1:10,000 scale
*** "LUBW-GEZG": Catchments
* [https://www.openstreetmap.org/relation/5691102 Map of the Rench from source to mouth] at [[OpenStreetMap]]

{{Rhine Tributaries}}
{{Rivers of Germany}}
{{Authority control}}

[[Category:Rivers of Baden-Württemberg]]
[[Category:Rivers of the Black Forest]]
[[Category:Rivers of Germany]]