3-D model of lake yields some surprises
This is not the first time the lake has been surveyed. In 1893, the famous Graf Zeppelin (Ferdinand Graf von Zeppelin) had it measured – making use of the tools available during his time. Then, around 1986 to 1990, measurements were taken once again.
However, the data obtained was not precise or detailed enough to facilitate scientific water management and conservation. Hence, a fresh investigation was initiated to obtain more data.
In this current survey, multi-beam and laser scanners were used, giving rise to a full-scale three-dimensional terrain model of the lake basin. The data collected has since resulted in some surprises: At its deepest point, the lake is 251.14 metres, about two metres less than previously thought.
Researchers also discovered numerous elevations in the canton of Thurgau, along the Swiss shore between Romanshorn and Güttingen. Archaeologists are currently diving into the lake to investigate this.
Other surprises included the discovery of underwater freshwater springs and the wreck of the steamship Helvetia, which sank in 1933.
More information: www.tiefenschaerfe-bodensee.info