Krebsbach (couple)

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Krebsbach
Data
Water code DE : 13452
location Danube-Isar hill country

Bavaria

River system Danube
Drain over Couple  → Danube  → Black Sea
source of the Mühlbach near Igenhausen
48 ° 27 '59 "  N , 11 ° 2' 25"  E
Source height approx.  470  m above sea level NHN  Q. d. Mühlbach's
muzzle At Walchshofen from the left and west in the pair of coordinates: 48 ° 29 ′ 11 ″  N , 11 ° 8 ′ 33 ″  E 48 ° 29 ′ 11 ″  N , 11 ° 8 ′ 33 ″  E
Mouth height approx.  434  m above sea level NN
Height difference approx. 36 m
Bottom slope approx. 4 ‰
length 9.1 km  with OL Mühlbach
Catchment area 29.95 km²

The Krebsbach is a brook in the district of Aichach-Friedberg in the Bavarian administrative district of Swabia , which flows into the middle pair from the left after a 9 km long east-northeast run on the main line near the village of Walchshofen in the district town of Aichach . Its two source branches are called Hirschbach and Mühlbach .

geography

Upper Mühlbach

The right upper course Mühlbach of the Krebsbach arises at about 470  m above sea level. NHN a little southwest of the parish village of Igenhausen in the municipality of Hollenbach next to the AIC 4 district road from the parish village of Haunswies in the neighboring municipality of Affing and runs northeast. He accompanies the street through the town on the right, separated from it by a row of houses. In the local area the half-hectare-sized village pond drains into it, which is elongated in a right side hollow. Below the village he passes two tiny ponds beneath a hillside forest next to the Mühlweg, a thin row of trees now accompanies him and he takes up an approximately 0.6 km long field path ditch lined with a row of trees from the right. A few steps later it flows to about 455  m above sea level. NHN together with the Hirschbach.

The Mühlbach is about 1.6 km long and drains about 4.4 km², it is considered the main upper course of the Krebsbach.

Upper course Hirschbach

The left upper course of the Hirschbach of the Krebsbach arises at about 487  m above sea level. NHN a little west of the hamlet of Hirschbach von Hollenbach on the edge of the forest in a meadow and flows consistently eastwards, first in the south past the village to a small pond surrounded by trees a little to the right of the course on the road from Igenhausen. After crossing under them, he has hardly an open bed for more than a kilometer in the surrounding strip of meadows. In the end there are small groups of trees to the right above the little deep hollow, then it flows open for its last 0.7 km, accompanied by trees, under a strip of forest on the right slope, past some ponds, crosses under the district road AIC 4 from Igenhausen to Schönbach and unites then soon to about 455  m above sea level. NHN with the Mühlbach.

The Hirschbach is about 2.4 km long and drains about 1.8 km².

course

The Krebsbach, which emerged at the confluence and is accompanied by a wood gallery to the end, runs just north towards the church village of Schönbach, before whose edge it turns to the northeast. At its settlement boundary to the adjoining municipality of Hollenbach, a 1.1 km long meadow stream runs next to the Am Herschbach road through the small gap to the Krebsbach, which, like Schönbach before, passes Hollenbach at a distance and flows more and more eastwards.

The village of Motzenhofen , which soon follows down the valley , on the other hand, has a new development area on the right slope opposite the settlement core, here the St 2047 crosses the small valley basin. After the downstream sewage treatment plant of the municipality, the Silberbründlbach flows in from the right, which arises from several branches in the Bernbacher Forest and drains two ponds of approximately 1.0 hectares and 3.4 hectares to the right of its lower course, which are on both sides of the aforementioned state road at the Chapel Aich .

A quarter of a kilometer further down, the Dümpfelbach , coming from the north-west of the Hollenbacher Kirchdorf Mainbach , flows in, which is over 5 km long and drains over a quarter of the catchment area and is therefore the largest tributary of the Krebsbach. At this inlet at 439  m above sea level. NHN at the border triangle of the municipality of Hollenbach, the market in Inchenhofen and the city of Aichach , the brook changes to the Aichach area for just over 2 km of its lower course to the east. It is crossed in the corridor by the district road AIC 1 and then passes through the church village of Walchshofen , where its hollow widens to the floodplain of the couple and it is crossed by the valley road AIC 5 that follows it. At the eastern edge of the village, the Krebsbach then flows out to about 434  m above sea level. NHN from the left into the middle pair .

The Krebsbach is 9.1 km long from the source of the Mühlbach, falls on this route by about 36 meters and has an average bed gradient of about 4 ‰.

Catchment area

The catchment area covers 30.0 km² and has roughly the shape of a right triangle. It has an eastern point at the mouth near Walchenhofen. The branch on the north-northeastern watershed here mostly runs between the Dümpfelbach on this side and the downstream pair tributary Weiherbach on the other side, the north-western branch then divides from the Friedberger Ach with its right tributary Edenhauser Bach and its tributary Kabisbach , it runs over a wooded ridge , at 536  m above sea level. NN reached the greatest height in the catchment area. The southwest corner near Haunsried is somewhat blunted by the catchment area of ​​the Affinger Bach, which also runs to the Friedberger Ach . The hypotenuse in the south borders on the upward catchment area of ​​the couple, for a long time it continues in forest areas, including the Bernbacher Wald , on the opposite side only smaller tributaries of the couple compete after the Schneitbach on the first section.

The cancer Bach pulls it closer to the right watershed by a rather flat Flurtal in natural space Donau-Isar-hills . The predominant geological layer is freshwater molasse, on the mounds to the left of the course there are loess derivatives deposited in the quaternary . The valley basin itself is mostly filled by floodplain sediments. Opposite the Hirschbach tributary there are peat soils in a wide hollow .

Tributaries

  • Mühlbach , right main line upper course, approx. 1.6 km and approx. 4.4 km²
  • Hirschbach , left upper course, approx. 2.4 km and approx. 1.8 km².
  • Silberbründlbach , from the right, 2.6 km and 3.4 km².
  • Dümpfelbach , from the left, 5.1 km and 8.2 km².

nature

Not so long ago, beavers returned to the Krebsbach . Because the animals sometimes cause great damage to agriculture, several animals have already been caught with a specially made beaver trap and transported to England and the Czech Republic .

Flood

The Krebsbach overflows its banks when it rains heavily when the snowmelts. The last time this happened was in March 2006, when half a meter of snow melted in a few days and parts of Walchshofen were flooded.

Individual evidence

BayernAtlas ("BA")

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

  1. ↑ a b c d e f g h Height queried on the background layer Official map (right click).
  2. ↑ a b c Lake area measured on the official map background layer .
  3. ↑ a b c d e Length measured on the background layer of the official map .
  4. ↑ a b c d Catchment area measured on the official map background layer .
  5. ↑ Geology according to the layer geological map 1: 500,000 .

Water directory Bavaria ("GV")

  1. ↑ a b c Length according to: List of brook and river areas in Bavaria - Lech to Naab river area, page 49 of the Bavarian State Office for the Environment, as of 2016 (PDF; 2.9 MB) (number of pages may change.)
  2. ↑ a b c catchment area according to: List of brook and river areas in Bavaria - Lech to Naab river area, page 49 of the Bavarian State Office for the Environment, as of 2016 (PDF; 2.9 MB) (number of pages may change.)

Others

  1. ^ Hans Graul : Geographical land survey: The natural spatial units on sheet 180 Augsburg. Federal Institute for Regional Studies, Bad Godesberg 1962. →  Online map (PDF; 4.1 MB)

literature