Triboldingerbohl, also known as Triboltingen or großes Bohl or Langenrain, is the fourth largest island of
Lake Constance
Lake Constance (, ) refers to three bodies of water on the Rhine at the northern foot of the Alps: Upper Lake Constance (''Obersee''), Lower Lake Constance (''Untersee''), and a connecting stretch of the Rhine, called the Seerhein (). These ...
, with an area of . It is long and up to wide. It is located in the easternmost part of the
Untersee (Lake Constance)
The ''Untersee'' (German language, German for ''Lower Lake''), also known as Lower Lake Constance, is the smaller of the two lakes that together form Lake Constance. The boundary between Switzerland and Germany runs through it. The lake surround ...
, near the point where the
Seerhein flows into the lake. This part of the lake is also known as the
Rheinsee. It belongs to the
Wollmatinger Ried nature conservation area; administratively it belongs to the district ''industrial area'' of the City of
Constance. Until 1934, it belonged to the municipality of
Wollmatingen, which was then annexed by Constance. Triboldingerbohl lies southeast of
Reichenau Island
Reichenau Island () is an island in Lake Constance in Southern Germany. It lies almost due west of the city of Konstanz, between the Gnadensee and the Untersee, two parts of Lake Constance. With a total land surface of and a circumference o ...
and from the dam that connects Reichenau to the mainland. The area between Triboldingerbohl island and the Reichenau dam is called ''Ermatinger pool'' and is an ecologically important shallow-water zone.
Triboldingerbohl is uninhabited. It is a bird sanctuary. It takes its name from the former
Swiss
Swiss most commonly refers to:
* the adjectival form of Switzerland
* Swiss people
Swiss may also refer to: Places
* Swiss, Missouri
* Swiss, North Carolina
* Swiss, West Virginia
* Swiss, Wisconsin
Other uses
* Swiss Café, an old café located ...
municipality
Triboltingen, which was located on the southern shore of Lake Untersee. Between Triboldingerbohl and the mainland lies the smaller island of ''Mittler Bohl'', also known as ''Langbohl''. The two islands are separated by a channel which is only wide. This channel and the channel separating Langbohl from the mainland are collectively known as ("tubes").
Both island are covered with
reeds. They consist of a several meters thick layer of ''Schnegglisand'', a calcareous deposits from
Blue-green algae
Cyanobacteria ( ) are a group of autotrophic gram-negative bacteria that can obtain biological energy via oxygenic photosynthesis. The name "cyanobacteria" () refers to their bluish green (cyan) color, which forms the basis of cyanobacteria' ...
), which is covered by a layer of humus.
Although the island is uninhabited, it is listed in the Constance street directory. It falls under postal code 78467 (Constance-Wollmatingen).
Street directory: Triboldingerbohl (Island)
/ref>
Footnotes
Uninhabited islands of Germany
Islands of Lake Constance in Germany
Landforms of Baden-Württemberg
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