Walder Altmuehl

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Walder Altmuehl
Data
location Weissenburg-Gunzenhausen district , Middle Franconia district , Bavaria , Germany
River system Danube
Drain over Altmühl  → Danube  → Black Sea
source southeast of Höhberg at a forest tip
49 ° 7 '58 "  N , 10 ° 40' 50"  E
Source height approx.  438  m above sea level NN
muzzle near Gunzenhausen in the Altmühl coordinates: 49 ° 7 '20 "  N , 10 ° 44' 15"  E 49 ° 7 '20 "  N , 10 ° 44' 15"  E
Mouth height approx.  412  m above sea level NN
Height difference approx. 26 m
Bottom slope approx. 4 ‰
length approx. 6.5 km
Catchment area approx. 7.5 km² 
without the catchment area of ​​the Altmühlsee
Right tributaries Förtleinsgraben , Rodelweihergraben

The Walder Altmühl is a right tributary of the Altmühl near Gunzenhausen in the Weißenburg-Gunzenhausen district in Central Franconia . Before the construction of the Altmühlsee in the course of the creation of the Franconian Lake District , it was a right branch of the Altmühl.

course

The Walder Altmühl arises, initially under another name or without a name, southeast of Höhberg at an eastern tip of the forest area around the Spiegelberg at about 438  m above sea level. NN . This upper course initially flows about 300 meters northwards to the side of a field path, where the drainage from another short ditch south-west of Höhberg runs from a nearby dump from the left. From there, the upper course follows eastwards in the direction of Streudorf to this dirt road, where it runs through a lake about 0.3 ha. He then runs through Streudorf underground under streets. At the southeast corner of the settlement area, the body of water, now under the name of Walder Altmühl , occurs at an altitude of about 419  m above sea level. NN and a good one and a half kilometers below its origin again to the surface.

The Walder Altmühl then flows along the southwestern bank of the Altmühlsee at a distance usually less than a hundred meters from its dam. You pass the villages of Mooskorb further away from the lake , then the eponymous forest and also Schweina . At this side of the lake's sports boat harbor, it takes up the Förtleinsgraben coming from the west , after passing the lido on the other side of the lake dam, in only a short distance from the same direction, the Rodelweihergraben . Then it goes around the south ofer of the lake and flows into the wide outlet bed of the Altmühlsee, into which water is only very rarely drained from the lake. It crosses under the B 466 on the southeast run and then flows out at about 412  m above sea level. NN into the stronger, but approaching Altmühl in a narrower bed, which has just run around the other bank of the lake, a little northwest of the settlement area of ​​Gunzenhausen.

The Walder Altmühl, including its upper reaches to Streudorf, is about 6.5 km long, on the name section from Streudorf about 4.9 km, of which about 0.4 km is accounted for by the route in the drainage bed of the Altmühlsee. From Streudorf the watercourse only loses around 7 meters in altitude. Because of the mean slope of the riverbed, which is only around 1.5 ‰ on this 4.5 km long stretch , the water flows very slowly here.

Catchment area

The Walder Altmühl drains, except when the emergency drain of the Altmühlsee drains into it, an area of ​​7.5 km, which naturally belongs to the sub-areas Königshofener Heide and Ornbau-Gunzenhäuser Altmühltal of the Central Franconian Basin . The Altmühltal part is a very flat plain in the northwestern part of the catchment area, in which the entire course of the river is located. The southwestern part of the Königshofener Heide is higher, here to the west of Höhberg, almost on the summit of the Spiegelberg ( 505  m above sea level ), which is about 500  m above sea level. NN highest point of the catchment area at its northwestern tip.

The valley level of the Altmühl is covered by floodplain deposits, in the hills at the edge the sandstone keuper stands . On the summit of the Spiegelberg above the sandstone keuper there is still Feuerletten ( Trossingen formation ).

Tributaries

References and comments

  1. ↑ a b c d e f Detail map of the course and catchment area of ​​the Walder Altmühl on: BayernAtlas of the Bavarian State Government ( information )
  2. ↑ a b c Length and catchment area according to: List of brook and river areas in Bavaria - Lech to Naab river area, page 111 of the Bavarian State Office for the Environment, as of 2016 (PDF; 2.9 MB) (and following page)
  3. ↑ The partial catchment area of ​​the Altmühlsee of 44.6 km² (same source) was not taken into account, since water is almost never given off from the lake via the emergency drain to the Walder Altmühl.
  4. ^ Franz Tichy: Geographical Land Survey: The natural spatial units on sheet 163 Nuremberg. Federal Institute for Regional Studies, Bad Godesberg 1973. →  Online map (PDF; 4.0 MB)
  5. ↑ Geology according to the switchable layer Geological Map of Bavaria 1: 500,000 .

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