Roarers

Willmandinger Bröller, episodically active spring cave

Active rover of the Zellerbach on the Albtrauf near Hechingen-Boll

Bröller is the Swabian name for periodically pouring karst springs , which are commonly referred to as hunger wells .

Surname

In the description of the Oberamt Reutlingen from 1824 it says of the outwardly little conspicuous cave in Hausen an der Lauchert : "This notorious spring lies in the Lauchartthal (...)." This spring got its name "from the roar or roar that it makes, when it pours. This roar should always precede the pouring for a while, and be a warning sign for the inhabitants of the valley (...) ”. Many, but not all, intermittently active water caves in the Swabian Alb are called roars or roars. In the Franconian Alb these types of springs are known as Tummler , in Westphalia as Quickspring .

geology

If the draining receiving water lies deeper than a spring or than the mouth of an active water cave, karst waterways widen and sooner or later the karst water level sinks lower. Then these springs and caves only pour when increased precipitation rises the local karst water level to a higher, i.e. H. older karst floor, lets rise. Today there are active and intermittently active as well as caves that have fallen dry forever on the Swabian Alb.

In addition, intermittent water caves occur in various geological formations and terrain conditions. Since the erosion phenomena continue to have an effect in the terrain, while water erosion and sedimentation of the Bröller only have a periodic or episodic effect, Bröller and their portals often strike out "in the air" (in blades, rock walls or rubble; see examples below).

Bröller geotopes

Striking roars in the Swabian Alb are:

f1 Map with all coordinates in this section: OSM

In the fear of the Elsachbröllers

Teufelsklingen -Bröller, ND, cave-like spring with a deep blade ; Heubach (LK Ostalb); At the exit of the Heubach – Bartholomä road on forest paths, approx. 2 km ascent to the blade. ^▼48.768980555556 9.9413388888889 600
Farmer's hole near Neuffen, mouth hole in the middle of a 20 m high blade. ^▼48.550013888889 9.4017222222222 530
Höllstern-Bröller near Gutenberg. ^▼48.534244444444 9.5110388888889 540
Elsachbröller in the rubble of a valley directly opposite the Falkensteiner Cave ^▼48.512630555556 9.4517416666667 575
Brunnenstein-Bröller, mouth hole in the rock face at the top of the Schlößlessteige to Lichtenstein Castle , above Honau near Reutlingen.
Willmandinger Bröller, mouth hole in the wooded debris in an old Talheim-Willmandingen climb. ^▼48.388538888889 9.1365277777778 700
Hausener Bröller , Hausen an der Lauchert ; at the edge of the floodplain, right on the road. ^▼48.304794444444 9.1929805555556 700
Bühlen-Bröller, below the edge of the eaves in the steep slope, 900 meters east of the Lochenpass near Weilstetten / Balingen. ^▼48.216830555556 8.8664388888889 910

In the Danube valley

Thiergartenbröller NE Prallhang der Donau, 1 km after Thiergarten (Beuron) . ^▼48.093494444444 9.1083194444444 650
Obere Bröllerhöhle (Heidenloch, Teufelsloch), a little north above the Thiergarten-Bröllers. ^▼48.096255555556 9.1077472222222 700

All of the named Bröller are protected as natural monuments.

Web links

Wikisource: Description of the Oberamt Reutlingen - sources and full texts

teckberg.de: Höllstern-Bröller near Gutenberg

Remarks

↑ This also happens when accumulating layers or layers, so-called aquicludes or aquitards , are a delaying obstacle.
↑ the no longer large amount of water sinks in normal times 20 m inside in a ponor

Individual evidence

^ Description of the Oberamt Reutlingen BOA 1824, p. 21

[A1-2] This also happens when accumulating layers or layers, so-called aquicludes or aquitards , are a delaying obstacle.

[A2-3] the no longer large amount of water sinks in normal times 20 m inside in a ponor

[1] Description of the Oberamt Reutlingen BOA 1824, p. 21