Ostrach (Danube)

	Ostrach; upper reaches: Fronhofer Bach, Schlierbach
	Course of the Ostrach
	Data
Water code	DE : 11332
location	Baden-Württemberg Ravensburg district; District of Sigmaringen ;
River system	Danube
Drain over	Danube → Black Sea
origin	the name run:; shortly before Fleischwangen -Eichenmühle ; 47 ° 52 '46 " N , 9 ° 28' 12" O; of Schlierbach : ; Zsfls. Fronhofer Bach / Dietlensriedbach in Fleischwangen at the church ; 47 ° 52 '46 " N , 9 ° 28' 43" O; of the upper course Fronhofer Bach :; north slope of the large wood west of Fronreute -Feldmoos ; 47 ° 51 '39 " N , 9 ° 29' 10 ″ O
Source height	Origin of name run:
	approx. 621 m above sea level NHN; origin Schlierbach:
	approx. 627 m above sea level NHN; source Fronhofer Bach:; approx. 680 m above sea level NHN
muzzle	In Hundersingen from the right and south into the Danube Coordinates: 48 ° 4 '26 " N , 9 ° 24' 7" E 48 ° 4 '26 " N , 9 ° 24' 7" E;
Mouth height	approx. 542 m above sea level NN
Height difference	approx. 138 m
Bottom slope	approx. 4.2 ‰
length	33.1 km
Catchment area	198.46 km²
	Confluence of the Ostrach (left) into the Danube near Hundersingen

The Ostrach is a river in southern Baden-Wuerttemberg in the districts of Ravensburg and Sigmaringen , which flows into the Danube from the right at Hundersingen in the Herbertingen municipality after a stretching slightly to the left, altogether north-north-west of over 33 kilometers .

geography

The Ostrach in the Pfrunger Ried

course

The Ostrach arises immediately north of the European main watershed near Fleischwangen in the district of Ravensburg , on the official main line it has successively the upper reaches Fronhofer Bach (to Fleischwangen) and Schlierbach (until shortly before its Mühlhof Eichenmühle). In the further course it takes on some drainage canals and ditches from the Pfrunger Ried on the left, some of which extend over the apex to the Rotach , which drains beyond the watershed towards Lake Constance.

Then the Ostrach in the village of Ostrach squeezes between two closely standing moraine hills , flows through the Weithart, the Göge and the Weitried and flows into the Danube in the Hundersingen district of the Herbertingen municipality in the Sigmaringen district .

The Ostrach is 33.1 km long, 11.1 km of which are in the Ravensburg district and 22.0 km in the Sigmaringen district. Its catchment area covers about 198.5 km².

Places on the Ostrach

The Ostrach crosses or grazes on its way the places Fleischwangen , where two of its upper reaches converge, Guggenhausen , Riedhausen , Ostrach and its suburbs Laubbach , Jettkofen , Wangen , Einhart as well as Habsthal , the Quantum district of Rosna , the Hohentengener suburbs Bremen and Beizkofen , around to flow into the Danube at Hundersingen .

Tributaries

List of tributaries and lakes from source to mouth. Water length, lake area, catchment area and height according to the corresponding layers on the LUBW online map. Other sources for the information are noted.
Water body names in brackets are descriptive names, only names that are not in brackets are real proper names.

Origin of the Fronhofer Bach at about 680 m above sea level. NHN on the northern slope of the Großer Holz west of the hamlet of Feldmoos from Fronreute . The stream initially flows east-northeast.

(Other source branch), from the left and west-southwest to 643 m above sea level. NHN near the hamlet of Obelhofen von Fronreute, 1.9 km. Arises at about 691 m above sea level. NHN south of the Großer Holz in the corridor north of the hamlet of Blümetsweiler von Horgenzell . Apparently by length - the official source branch is only 1.2 km long at the confluence - like the catchment area the more important branch. The Fronhofer Bach then flows more and more west.

Dietlensriedbach, from the right and east-northeast to about 627 m above sea level. NHN near the church in Fleischwangen , 1.4 km. Arises at about 649 m above sea level. NHN at the Fleischwangener Hof Zippern. This inflow creates the Schlierbach , which flows off to the west.

→ (junction of an oxbow lake), to the right to about 621 m above sea level. NHN shortly before the Fleischwangener oak mill. From here on the water is called Ostrach .

Flows through to about 620 m above sea level. NHN the Eichenmühleweiher at the eponymous Mühlenhof of Fleischwangen, about 0.1 ha.

Reutebach, from the left and south-southeast to about 617 m above sea level. NHN at the mill, 2.1 km. Arises at about 667 m above sea level. NHN on a single farm east of the hamlet of Rimmersberg von Wilhelmsdorf . After this tributary, the Ostrach goes on the northwestern ditch through the Riedwiesen .

← (return of the oxbow lake ), from the right to 614.9 m above sea level. NHN , 0.7 km ..

(Bach from the Sickentobel ), from the right and south to about 614 m above sea level. NHN before passing Nassach, 2.5 km. Rises at about 684 m above sea level. NHN above its Waldtobel between Rimmersberg and the Wilhelmsdorf village of Esenhausen.

Fleischwanger Oh , from the right and east to below 611 m above sea level. NHN west of Guggenhausen , 3.5 km. Flows at about 640 m above sea level. NHN

a forest pond southeast of the Schnaidhöfe of Unterwaldhausen , 0.2 ha and flows through the upper edge of the village at 617.1 m above sea level. NHN

the 9.9 hectare Guggenhauser Weiher.

Weiherbach, from the right and east-northeast to about 610 m above sea level. NHN on the municipality boundary from Guggenhausen to Riedhausen , 0.8 km. Arises at about 621 m above sea level. NHN on the northern edge of the hardwood next to the K 8028 Guggenhausen – Riedhausen.

Auenbach, from the right and north to about 609 m above sea level. NHN in the Outer Ried , 1.4 km. Arises at about 632 m above sea level. NHN a little south of Riedhausen.

Eschhauser Canal , from the left and east-southeast to about 608.5 m above sea level. NHN in the Riemenwiesen , 2.9 km. Arises at about 616 m above sea level. NHN on the northern edge of Wilhelmsdorf. Ried drainage ditch.

Weiherbach, from the right and northeast to about 608.5 m above sea level. NHN almost opposite the previous one, 2.6 km. Arises as Erletbach at about 640 m above sea level. NHN in the Erletwiesen east of Riedhausen.

(Trench inlet), from the right and northeast to a little over 608 m above sea level. NHN , 0.8 km. Arises at about 616 m above sea level. NHN in the Baienwiesen northwest of the Weihermühle von Riedhausen.

(Trench inlet), from the right and northeast to about 608 m above sea level. NHN at MOUNTAIN, 0.9 km. Arises at about 618 m above sea level. NHN in the Baienwiesen northwest of the Weihermühle von Riedhausen.

As a result , a number of drainage canals and ditches run from the Pfrunger-Burgweiler Ried on the left , which also drains partly south to the Rotach and thus to Lake Constance .

Wilhelmsdorfer Kanal , from the left and south-southeast to not much below 608 m above sea level. NHN immediately before the Ostrach bridge on the K 7964 Riedhausen – Wilhelmsdorf, 3.4 km. Northern part of a continuous drainage canal , which continues southwards as the southern main canal , which drains to the Rotach, through Wilhelmsdorf, which is already near, the apex is 614.1 m above sea level. NHN .

Eulenbruck Canal (?), From the left and south to not much below 608 m above sea level. NHN immediately after the Ostrach bridge of the K 7964, 3.3 km. Arises at about 617 m above sea level. NHN between the village of Pfrungen and Wilhelmsdorf on the edge of the Eulenbruch .

Luckengraben , from the left and south-southwest to below 608 m above sea level. NHN opposite the cattle pasture at a slight right bend, 4.3 km and 4.8 km². Arises at about 690 m above sea level. NHN still in a Waldtobel in Großholz north of the village of Ruschweiler von Illmensee .

Hornbach , from the left and southwest to below 608 m above sea level. NHN at MOUNTAIN, 3.1 km and 3.6 km². Arises at about 618 m above sea level. NHN east of the Ostrach hamlet Egelreute .

(Drainage ditch), from the right and southeast to below 608 m above sea level. NHN in the Riedwiesen (community exclave of Königseggwald ), 1.7 km. Arises at about 609 m above sea level. NHN next to the K 7964 in the cattle pasture .

Grape pit, from the left and southwest to about 607 m above sea level. NHN , 1.6 km. Arises at about 608 m above sea level. NHN on the north-western edge of the vineyard Große Trauben .

Laubbacher Mühlenbach , from the right and southeast to about 607 m above sea level. NHN on a bridge at the Laubbacher Mühle von Ostrach, 2.7 km. Arises at about 612 m above sea level. NHN on the eastern edge of the Lohwiesen forest to the Bühlhof in Riedhausen.

Tiefenbach , from the left and west to about 607 m above sea level. NHN little after the previous one, 5.1 km and 14.7 km². Arises at about 635 m above sea level. NHN between the hamlet of Hahnennest and the village of Burgweiler Ostrach on the L 620. The Tiefenbach is the last of the major drainage routes from the Pfrunger-Burgweiler Ried. After that, the Ostrach turns more and more to the north.

Laubbach, from the right and east to below 607 m above sea level. NHN on a field path bridge west below the hamlet of Laubbach von Ostrach, 1.1 km. Arises at about 631 m above sea level. NHN in the hills on the eastern edge of the village.

Krebsbach , from the left and west to below 607 m above sea level. NHN a little after the previous one, 3.1 km. Arises at about 638 m above sea level. NHN on the western edge of the Ostrach village of Spöck .

(Slope inlet), from the left and southwest to about 605 m above sea level. NHN a little before Ostrach, 1.3 km. Arises at about 613 m above sea level. NHN under the Ostrach hamlet of Dichtenhausen. Here the Ostrach now flows north.

(Slope and path ditch), from the left to about 605 m above sea level. NHN just before the first houses in Ostrach, 1.3 km. Arises at about 624 m above sea level. NHN at the southern entrance of the L 280 to Ostrach .

The Ostrach in the middle of the town of the same name

Seebach , from the right and east-southeast to about 605 m above sea level. NHN opposite the southern Ostrach, 6.3 km and 17.6 km². Arises at about 632 m above sea level. NHN between the Hoßkircher Forsthaus and the 15.2 hectare Königseggsee, which he then immediately to about 626.5 m above sea level. NHN passes through.

Weiherbach , from the left and southwest in the center of Ostrach, 3.0 km. Arises at about 638 m above sea level. NHN west of the Wolfsberg .

Passes between Ostrach and Jettkofen at a distance to the left of Muterer Eichholzsee and two other quarry ponds, a total of 21.7 ha.

Passed close to the left the good half dozen Jettkofer lakes in a gravel plant below the village and across from Wangen, which are at about 595 m above sea level. A total of 28.7 ha.

Wolfgraben, from the right and northeast to below 590 m above sea level. NHN shortly before the Ostrach village Einhart , 2.0 km. Arises at about 629 m above sea level. NHN east of Einhart.

Sägebach, from the left and southwest to about 588 m above sea level. NHN next to the Ostrach bridge, estuary of the Störenbach, s. u., 0.6 km. Digging away.

→ Exit of Einhart's engine duct, immediately after the previous one to the right

← Return of the Einhart engine duct, from the right to about 586 m above sea level. NHN shortly after a dirt road bridge, 0.4 km.

Störenbach , from the left and south to about 585 m above sea level. NHN between Einhart and Eimühle , 5.4 km and 20.2 km². Arises at about 610 m above sea level. NHN southeast of the village of Magenbuch in Ostrach in the Bühl forest . Has a left source arm of the same name from the west of hardly less length but clearly predominant catchment area, which is north of the Ostrach hamlet Lausheim at about 600 m above sea level. NHN runs through the 9.3 hectare Lausheimer Weiher .

→ Exit of a flood channel, to the right to about 584 m above sea level. NHN at the egg mill

← Return of the flood canal, from the right to about 580 m above sea level. NHN at the Ostrach sewage treatment plant, 0.8 km.

(Inflow), from the left and west-southwest to just under 577 m above sea level. NHN , 1.5 km. Arises at about 606 m above sea level. NHN southwest of the Mengening village of Rosna on the edge of the Fohrenstock .

Fohrenstockgraben, from the left and west near Rosna at about 576 m above sea level. NHN , 2.2 km. Arises at about 615 m above sea level. NHN west of Rosna in the Bühlhäule .

Altensweiler Graben, from the right and south-east to 574.7 m above sea level. NHN at the bridge on the road from Rosna to Altensweiler, 2.1 km. Arises at about 604 m above sea level. NHN near the hamlet of Altensweiler von Hohentengen .

← → Departure and return of the engine duct at the entrance to the Hohentengen village of Bremen , to and from the left, 0.4 km.

Krebsbach , from the right and south-southeast to about 565 m above sea level. NHN next to the first Ostrach bridge in Bremen, 6.7 km and 10.5 km². Arises at about 606 m above sea level. NHN in the Breiten Wiesen northeast of Jettkofen.

→ Exit of the engine duct of the cooperative mill, to the left to about 564 m above sea level. NHN in Bremen shortly before the second Ostrach bridge.

Soppengraben, from the left in Bremen immediately after its exit into the engine duct, 1.8 km. Arises at about 594 m above sea level. NHN northwest of Bremen on the edge of the Bremerholz .

Color brook , from the right and south-southeast to about 562 m above sea level. NHN from Hohentengen to the Ostrach itself, 7.0 km and 17.9 km. Arises as a pond brook at about 614 m above sea level. NHN west of the Ostrach village of Tafertsweiler .

← Return of the engine duct of the cooperative mill, from the left a little after the previous one at Hohentengen, 0.4 km.

→ Exit of an engine duct , to the right to 561.1 m above sea level. NHN near the Hohentengener village of Beizkofen .

← Return of the engine duct , from the right to 558.1 m above sea level. NHN on the northern edge of Beizkofen, 0.6 km.

→ Exit of the engine duct of the Riedmühle, to the right at the Hohentengener Riedmühle .

Beizkofer Bach, from the left and southwest into the Ostrach itself at about 557 m above sea level. NHN opposite the Riedmühle, 1.3 km. Is a drainage ditch below 560 m above sea level. NHN arises in the wide valley west of Beizkofen.

← Return of the engine duct of the Riedmühle, from the right a little towards the Riedmühle, 0.4 km.

→ Exit of the Ostrach flood canal, to the right to about 547 m above sea level. NHN just before the Hundersinger electricity works on the Ostrach, 0.4 km. Empties into the Friedberger Ach , which already runs parallel to the Ostrach , which then continues canalized.

Shortly before the next, it cuts the damp depression of an old loop of the river, in the course of which two remains of oxbow water lie one after the other, a total of 0.6 ha.

Friedberger Bach , from the right and south-southeast to below 545 m above sea level. NHN between the sports fields on the southern edge of Hundersingen, 12.7 km and 20.4 km² (with the end of the flood channel and the associated catchment area). Arises at about 635 m above sea level. NHN near Bachhaupten.

Mouth of the Ostrach at about 542 m above sea level. NHN from the right and south in the Hundersingen district of Herbertingen just below the river bridge into the Danube . It is 33.1 km long here and has a catchment area of 198.5 km² behind it.

level

Jettkofen / Ostrach gauge

South of Ostracher location Jettkofen is located at flow kilometers 16.0 the level Jettkofen / Ostrach the flood forecasting center Baden-Württemberg and the State Institute for Environment, Measurements and natural Baden-Württemberg (LUBW); The operator is the Tübingen regional council . The level zero point is 598.37 m above sea level. NN .

Statistical values

Stand / drain	m	m³ / s
Average water level	0.30
Lowest water level in 1992–2003 on July 10, 1993	0.07
50-year high water level / runoff	1.09	13.3
100-year flood runoff		14.6
Lowest discharge from 1992–2003 on June 16, 1996		0.09
Average runoff		0.95

environment

fauna

There has been a beaver population in Pfrunger-Burgweiler Ried since 2005 - verifiable since October 2008. In the upper area of the Ostrach, which serves the drainage function here, a few meters below the mouth of the Hornbach, one or more beavers built a dam across the stream. The dam held back thousands of cubic meters of water, whereupon the water has already overflowed its banks not only to the upper edge of the embankment, but to the great annoyance of agricultural businesses in Riedhausen and Laubbach. The Hornbach also overflowed its banks. At the end of November 2008, the dams were removed by 40 centimeters, the structure could not be removed entirely. In order to keep the beavers away from the Ostrach in the future, a wire fence with electricity was laid above the water level.

A large nature conservation project costing seven million euros aims to wet the core areas in order to restore the reed to its original state. Among other things, logs are transported to the barriers that are supposed to prevent the water from flowing out of the drainage ditches that were once created. Trench weirs have already led to visible successes in places. The project ended in 2015.

Web links

Commons : Ostrach - Collection of images, videos and audio files

Course and catchment area of the Ostrach on: State Institute for the Environment Baden-Württemberg (LUBW) ( information )
Flood hazard map in the area of the Jettkofen gauge

Individual evidence

↑ ^a ^b ^c ^d ^e Height according to the contour line image on the background layer Topographic map of the online map server of the State Institute for the Environment, Measurements and Nature Conservation Baden-Württemberg (LUBW). See the → web links .

↑ ^a ^b Length according to the water network layer ( AWGN ) of the LUBW's online map server.

↑ ^a ^{b Catchment} area after the layer aggregated areas XY of the online map server of the LUBW.

^ German Hydrological Yearbook Danube Region 2006 Bavarian State Office for the Environment, p. 87, accessed on October 4, 2017, at: bestellen.bayern.de (PDF, German, 24.2 MB).

↑ Lake area according to the layer standing waters of the LUBW's online map server.

↑ Catchment area according to the basic catchment area (AWGN) layer of the LUBW's online map server.

↑ ^a ^b ^c ^d ^e ^f ^g ^h Height according to the blue lettering on the background layer Topographic map of the LUBW's online map server.

↑ Catchment area added up from the sub-catchment areas according to the basic catchment area (AWGN) layer of the LUBW's online map server.

↑ Information on the website of the flood forecast center Baden-Württemberg , accessed on August 13, 2015

^ According to Pia Wilhelm, employee in the nature conservation center of the Swabian Heimatbund Pfrunger-Burgweiler Ried

↑ Josef Unger: Water stagnation in Pfrunger-Burgweiler Ried removed during work. Beaver dam now a little lower . In: Südkurier of November 21, 2008

↑ Florian Unger: Nature. Dam across the Ostrach. Beavers are at work in Pfrunger-Burgweiler Ried - worrying about congestion and flooded meadows . In: Südkurier of November 11, 2008

[LUBW-TK-HLB-Höhe-1] Height according to the contour line image on the background layer Topographic map of the online map server of the State Institute for the Environment, Measurements and Nature Conservation Baden-Württemberg (LUBW). See the → web links .