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| Rench | |
|---|---|
 The Rench dyke nearLautenbach | |
 Course of the Rench (interactive map) | |
| Location | |
| Country | Germany |
| State | Baden-Württemberg |
| Reference no. | DE: 2354 |
| Physical characteristics | |
| Source | |
| • location | atKniebis nearBad Griesbach im Schwarzwald-ZufluchtsourceSchöngrundbächle |
| • coordinates | 48°29′27″N8°14′49″E / 48.4908639°N 08.2469944°E /48.4908639; 08.2469944 |
| • elevation | ca. 915 m above sea level (NN) |
| Mouth | |
• location | at Rhine km 314.700, nearRheinau/Lichtenau/Helmlingen into theRhine |
• coordinates | 48°43′22″N7°58′00″E / 48.7226583°N 7.9665861°E /48.7226583; 7.9665861 |
• elevation | 123 m |
| Length | 57.1 km (35.5 mi)[1] |
| Basin size | 305.1 km2 (117.8 sq mi)[1] |
| Discharge | |
| • location | [2] |
| • average | 8.37 m³/s |
| Basin features | |
| Progression | Rhine→North Sea |
| Landmarks |
|
| Population | 88650[3] |
| Tributaries | |
| • left | Ödsbach, Hesselbach |
| • right | Lierbach,Acher (Teilmenge) |
TheRench is an eastern tributary of theRhine in theOrtenau inCentral Baden,Germany. It rises on the southern edge of theNorthern Black Forest atKniebis nearBad Griesbach im Schwarzwald. The source farthest from the mouth is that of theSchöngrundbächle which rises at a height of around915 m above NN in the parish ofZuflucht. After flowing through its steep mountainsideklinge 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 theCentral 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 km it, together with theMühlbach,confluences with the Rhine at 314.7 km betweenHelmlingen (Rheinau) andLichtenau.
The upper Rench valley aroundBad Peterstal-Griesbach initially cuts into the forestedbunter sandstone plateau before entering a more open, very steep rugged valley, near the town ofOppenau. There it is joined from the east by theLierbach, well known for theAll Saints Waterfalls.InLautenbach the valley abruptly broadens into theFoothill Zone with the town ofOberkirch at the foot of the vineyards and the little town ofRenchen.
TheB 28 federal road, long an important route through the Black Forest, runs through the Rench valley linking theStrasbourg area with the upperNeckar region. It climbs steeply above Bad Griesbach in hairpin bends to theAlexanderschanze (968 m). TheRench Valley Railway starts atAppenweier and runs as far asBad 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 theAcher Rench Correction to divert floodwaters. It branches off the Rench atErlach, picks up theAcher Canal at Rheinau and merges with the actual Rench atMemprechtshofen.
