Sasbach (Acher)
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Sasbach Local names on the lower reaches: Sasbach-Flutkanal, Sasbach-Laufbach-Röderbach-Flutkanal, Sulzbach, Mühlbach |
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,_Br%C3%BCcke_bei_Balzhofen_(2).jpg) Bridge over the Sulzbach near Balzhofen |
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| Data | ||
| Water code | DE : 2357278 | |
| location |
Northern Black Forest valley
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| River system | Rhine | |
| Drain over | Rhine side ditch → Rhine → North Sea | |
| source | Weiler Schönbüch, Sasbachwalden 48 ° 35 ′ 57 ″ N , 8 ° 9 ′ 9 ″ E |
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| Source height | approx. 614 m above sea level NN | |
| muzzle | At Söllingen as Mühlbach in the Rheinseitengraben ( Acher -Uunterlauf) and then in the Rhine Coordinates: 48 ° 47 '14 " N , 8 ° 3' 44" E 48 ° 47 '14 " N , 8 ° 3' 44" E |
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| Mouth height | below 118 m above sea level NN | |
| Height difference | approx. 496 m | |
| Bottom slope | approx. 16 ‰ | |
| length | 31.6 km | |
| Left tributaries | Büchelbach, Laufbach , Kanalbach | |
| Right tributaries | Brandbach, Langertbach, Aubächle, Laufbach-Röderbach-Flutkanal, Kleines Sulzbächle | |
.jpg) Flood relief system of the HRB Hägenich , in the foreground the Sasbach with the confluence of the Kleiner Sulzbächles |
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The Sasbach is a body of water in the Ortenaukreis in Baden-Württemberg and in the Rastatt district . It initially runs north-west in the northern Black Forest , then in the Upper Rhine Plain, first north-north-east, later as Sulzbach again north-west. Its mouth is 31.6 kilometers below its source near Söllingen , where, coming from the right, it finally runs under the name Mühlbach into the Acher underflow Rhine side ditch .
geography
The source area of the Sasbach lies in the hamlet of Schönbüch in Sasbachwalden am Hagenberg at an altitude of about 614 m above sea level. NN . Here it rises on a meadow near a building and first flows northwest towards the central town of Sasbachwalden, at whose church the Brandbach and Langertbach, coming from the right, flow into it. About 800 m further on, the Büchelbach meets the Sasbach from the left.
From the village of Sasbach , the Sasbach continues to flow in a north-northwest direction. There the Aubächle flows into it from the right. After the Sasbach has passed under the B3 and the Rhine Valley Railway , it is called the Sasbach Flood Canal and flows north when it is straightened. At Ottersweier , the Laufbach-Röderbach-Flutkanal flows from the right into the Sasbach-Flutkanal, which again changes its name to Sasbach-Laufbach-Röderbach-Flutkanal. Shortly afterwards, in the nature and landscape protection area of Waldhägenich, the small Sulzbächle meets the Sasbach from the right. From here on he calls himself Sulzbach. When it widens , the canal makes a curve in a north-westerly direction and a few hundred meters further on it is met by the water-rich Laufbach , which has already crossed under the Sasbach before.
At Stollhofen, the Kanalbach , a branch of the Achern Mühlbach , which crosses the lower-lying Scheidgraben to the left and parallel to the Sasbach shortly before its mouth, is tired from the left . A little below the estuary of the Kanalbach, the short stitch of a first Mühlbach discharge leads part of the Sasbach waterway to the companion on the left. Thereupon his name changes to Mühlbach for the last time. Under this name it runs for about 2 km parallel to the Rhine Low Canal , which has taken up the Scheidgraben, and then passes under the new companion; Another short Mühlbach discharge also supplies water to the Niederungskanal. From here on, the Sasbach itself still flows about 350 m through the floodplain forest to the right of the Rhine, shortly before which it finally flows into the right bank of the Rhine . This then runs parallel to the Rhine for a long time and then flows into the river from the right at Wintersdorf .
Correction
In the course of the Acher-Rench correction , the flood channels for Sasbach, Laufbach and Röderbach were built and the Sulzbach straightened. The Sasbach-Laufbach-Röderbach flood canal is dimensioned for a discharge of 31 cubic meters per second. In 1963 the Hägenich flood retention basin was completed with a normal storage space of 1.4 million m³. The retention basin, previously partly used as litter meadow , was reforested with balsam poplars - the only tree species that could produce yields with irregular damming. A guide published by the city of Bühl in 1992 through the nature and landscape protection area Waldhägenich , in which the retention basin is located, characterizes the flood canal and the Sulzbach as "the opposite of a species-rich brook, suitable only as an example of a water management hostile to nature".
The measures of the Acher-Rench correction enabled the expansion of the settlement areas in the Bühl area and more intensive agricultural use of the area, in particular the conversion of meadows to fields. The enlarged settlement areas led to increased surface runoff, so that the retention basin was no longer sufficient in the mid-1980s. At the beginning of the 1990s, another basin with storage space of 540,000 m³ was built at the Kleiner Sulzbächle in the Mältig district . Both basins are connected to each other by overflow thresholds.
During the floods in May and June 2013 , the retention basins were completely filled by prolonged heavy rainfall, so that water flowed into the Sulzbach via the flood relief system for 22 hours . There was extensive flooding at the Sulzbach; larger damage in built-up areas could be prevented by the construction of sandbag dams. The flood had an annual frequency of five to ten years with an unusually large discharge.
Individual evidence
LUBW
Official online waterway map with a suitable section and the layers used here: Course and catchment area of the Sasbach
General introduction without default settings and layers: State Institute for the Environment Baden-Württemberg (LUBW) ( notes )
- ↑ a b Height according to the contour line image on the topographic map background layer .
- ↑ Length according to the waterway network layer ( AWGN ) .
- ↑ Mouth conditions and names according to the layer water names of the LUBW's online map server.
Other evidence
- ↑ Heinz Fischer: Geographical Land Survey: The natural spatial units on sheet 169 Rastatt. Federal Institute for Regional Studies, Bad Godesberg 1967. → Online map (PDF; 4.4 MB)
- ^ Josef Riegelsberger: Acher-Rench correction. In: Ministry of the Interior of Baden-Württemberg (Ed.): Water management in Baden-Württemberg. Water supply, sewage disposal, river engineering, dam construction, agricultural hydraulic engineering, administration, organization. Verwaltungs-Verlag, Munich 1969, pp. 146–152, here p. 150.
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↑ a b City of Bühl (ed.): The Waldhägenich. A guide through the nature and landscape reserve. Bühl 1992, p. 18 f;
Zweckverband flood protection area Baden-Baden / Bühl: flood retention basin No. 18 (extension) Bühl-Balzhofen. (Accessed April 28, 2019). - ↑ Stadt Bühl, Waldhägenich , pp. 16, 20 f, 36 (quotation).
- ^ Rainer Ell: Flood in June 2013 - processing and citizen participation. In: WBW Fortbildungsgesellschaft für Gewässerentwicklung mbH (Ed.): Exchange of experience in the operation of flood retention basins in Baden-Württemberg. Volume of reports 21st Annual Conference 2014. Karlsruhe 2015, pp. 52–53 ( Download )
