Seebach (Regnitz)

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Seebach
The Seebach near Dechsendorf, 2014

The Seebach near Dechsendorf , 2014

Data
Water code DE : 24242
location Middle Franconian basin

Bavaria

River system Rhine
Drain over Main-Danube Canal  → Regnitz  → Main  → Rhine  → North Sea
source Pond discharge from the uppermost Seebach pond near Gerhardshofen- Sintmannsbuch
49 ° 36 '23 "  N , 10 ° 45' 3"  E
Source height 346  m above sea level NHN
muzzle near Möhrendorf- Kleinseebach in the Main-Danube Canal Coordinates: 49 ° 38 '52 "  N , 11 ° 0' 21"  E 49 ° 38 '52 "  N , 11 ° 0' 21"  E
Mouth height 267  m above sea level NHN
Height difference 79 m
Bottom slope 3.5 ‰
length 22.4 km
Catchment area 116.61 km²

The Seebach is an approximately 22.5 km long left-hand and western tributary of the Main-Danube Canal in Middle Franconia .

geography

course

The Seebach rises near the desert of Sintmannsbuch in the Gerhardshofen community in the Neustadt an der Aisch-Bad Windsheim district and, on its first and foremost eastward moving upper course, flows through an uninterrupted chain of fish ponds over 4.5 km long in the still shallow valley. At the Spirklesweiher she crosses over to the district of Markt Weisendorf in the district of Erlangen-Höchstadt and experiences the first and shortest of three also feeding streams from the left. Then it runs more and more east-northeast. At the hamlet of Sintmann , where the first district road ERH 28 crosses, the second, longer Strietgraben flows from the left . Behind the village of Mitteldorf , which is also to the left of the run, there are only sporadic ponds in the valley basin. In the middle of Weisendorf, where the state road St 2263 crosses the Seebach, the third upstream tributary flows into the Sauerheimer Graben . The following Reinersdorf is the last village of Weisendorf in the Seebachtal, behind which the small river enters the district of Großenseebach , where the middle course begins after a bend to the east-southeast.

On this will follow soon in local Heßdorf the, at the eastern edge A three crosses on a dam rather nondescript valley. Then the Seebach enters the area of ​​the independent city Erlangen , where Dechsendorf is the first valley town. There the Mohrbach , also called Moorbach , flows into it with a length of over 13 km (with its main upper course) , again from the left. From here the state road St 2240 runs for a while in the here quite wide floodplain, to which the Mönau forest joins on the flat slope in the south , while the Seebach runs on the left edge of the corridor to Dechsendorfer Lohe . At the height of the old location Heusteg at the beginning of the Mönau Forest, the Seebach slowly turns to the northeast and with the re-entry into the district of Erlangen-Höchstadt and the district of Möhrendorf , the short lower course begins in a very straight ditch.

From here the Seebach runs constantly to the left of the Main-Danube Canal, which is nowhere more than a quarter of a kilometer away, sometimes less than 50 meters. Right at the Erlangen lock, the forest ditch, which is almost 12 km long from its top source, flows into it from the left . Opposite the southern end of the settlement area of ​​Möhrendorf, the Seebach is - wholly or partially - introduced into the canal, but a trench marked as Seebach on maps continues to closely follow the waterway and runs in the small part of Möhrendorf on this side of the canal under the piped as a district road (ERH 31 ) through the main street of Möhrendorf. The Seebach, which runs in front of the outskirts, now takes in an inflow of less than 5 km from the left from the state forest of Mark , which also feeds its chain of ponds on the lower reaches. It then separates a new building area to the right of the settlement core of the Möhrendorfer village Kleinseebach on the left, both of which are connected via the Seebach bridge of the district road ERH 32, and then flows from the left into the Main-Danube Canal .

Before it was built, the Seebach flowed into the Regnitz east of Kleinseebach .

Catchment area

The Seebach has a catchment area of ​​116.6 km² in size, which roughly has the contour of a parallelogram with two long sides in the south and north and a long diagonal from the south-west to the rounded north-east point. In it, the Seebach flows from the southwestern tip over three quarters of its length to the east and very close to the southern watershed, then on the remainder of the stretch northeast along the southeastern narrow side, just this side of the Main-Danube Canal in the left Regnitz floodplain. The large parts of the area in the north of the catchment area are therefore mainly drained from the large tributaries on the left, these are - from the source to the mouth - the Mohrbach (bearing 37th century), which flows at an acute angle from the west-north-west only quite far to the east at Dechsendorf % of the total catchment area at), the zumündende shortly after the direction of bend of the Seebach run northeast forestry trench (24%), with its significant left feed Roettenbach , both on the western edge of the national forest Mark run, and finally a spite of not less length unnamed on maps inlet at Möhrendorf in the middle of the state forest (6%); only these three together make up two thirds of the total catchment area.

In the south it borders on that of the Steinforstgraben and the Bimbach , which flow directly above the Regnitz. In the southwest the Middle Aurach competes with its tributaries, the Welkenbach with its left tributary Birkenbühlbach and the Reichenbach . In the northwest the Seebach catchment area joins that of the far downward Regnitz tributary Aisch and its right tributaries Reisigbach , Aschenbach , Wintersbachgraben , Schwarzenbach , Staffelbach , Reutgraben , Weihergraben and Willersdorfer Graben . In the north, the catchment area of ​​the Hirtenbach and smaller, eastward running downward Regnitz tributaries, such as that of the Kupfergraben, slide in front of it .

Tributaries

List of tributaries and RiverIcon-SmallLake.svglakes from source to mouth. Partly with water length, lake area, catchment area and altitude. Other sources for the information are noted.

environment

The 114.48 hectare Seebachgrund , designated as a landscape protection area (LSG-00340.05), is considered an ecologically valuable meadow valley and is home to rare bird , insect and plant species . So come u. a. the Common Snipe and the Corn Crake . The exceptionally sandy soil in the Seebach valley contributes to this diversity of endangered species (see also Franconian sand axis ). The Seebachtal is shown in the regional planning as a regional green corridor and thus largely protected from development.

The eastern Seebach valley in the area of Möhrendorf and Kleinseebach used to be flooded regularly. The new, straightened outflow into the canal and an additional overflow into the canal southwest of Möhrendorf, which limits the amount of water in the area of ​​the Möhrendorf municipality, has completely prevented flooding in this section of the river since the early 1970s. In the past, they caused considerable damage in Kleinseebach, for example. B. July 1941.

Nevertheless, there are ecologically particularly valuable sections in this area as well. For areas of the Seebach that have lost their natural character due to human interference, the land use plan of the municipality of Möhrendorf provides for partial renaturation .

The Seebachlauf is not accessible in places where there are no paths in the bank area parallel to the water.

In the catchment area of ​​the Seebach, naturally regarded as part of the Aischgrund , carp pond management is widespread, especially on the upper reaches of the Mohrbach and along the forest trench . The numerous ponds have a total area of ​​several square kilometers.

Individual evidence

BayernAtlas ("BA")

Official online waterway map with a suitable section and the layers used here: Course and catchment area of ​​the Seebach
General introduction without default settings and layers: BayernAtlas of the Bavarian State Government ( notes )

  1. ↑ a b c Height requested on the background layer Official map (right click).
  2. ↑ Length measured on the official map background layer .
  3. ↑ The area of ​​the lake measured on the official map background layer .
  4. ↑ Catchment area measured on the official map background layer .
  5. ^ Name Hörbach developed according to the historical map layer . The run essentially consists of a chain of ponds, including the Hörbachweiher .
  6. ↑ Roughly measured lake area on the background layer of the official map .

Water directory Bavaria ("GV")

  1. ↑ a b c d Length according to: Directory of stream and river areas in Bavaria - Main river area, page 48 of the Bavarian State Office for the Environment, as of 2016 (PDF; 3.3 MB) (number of pages may change.)
  2. ↑ a b c d catchment area according to: Directory of stream and river areas in Bavaria - Main river area, page 48 of the Bavarian State Office for the Environment, as of 2016 (PDF; 3.3 MB) (number of pages may change.)

Others

  1. ↑ According to information from the local administration, the name of the water body is female, at least on the lower reaches of Möhrendorf.
  2. ↑ Kroner Bach to flood Risk Management Plan catchment Bavarian Main map service . The stream could not be found on maps or identified with another.
  3. ↑ Landscape protection area Seebachgrund according to the Green List of Landscape Protection Areas in Middle Franconia
  4. ^ Conflicts of use between pond management, nature conservation and leisure interests in Aischgrund Werner Bätzing, Mitteilungen der Fränkische Geographische Gesellschaft Vol. 59, 2013, pp. 81–100.

literature

Web links