University for Children (Kinder-Universität)
Head of working group
AG Hydrogeologie/ Landschaftswasserhaushalt
IBU, Fk. V, Gebäude A1
Carl von Ossietzky Universität
Raum: A1 1-130
Tel.: ++49 (0) 441 / 798 - 4236
Fax: ++49 (0) 441 / 798 -3769
Explanation to the film 'Is there water under the ground?'
The film is intended to prove that there is also water underground (often very close to the surface in Germany). This water is called groundwater and is normally not visible and is therefore a 'secret treasure'
Explantation to the film "Water balance Germany":
The film is intended to show how high the water would stand on average in Germany if it accumulated over a year (up to the shoulder of the 1. 20 m tall Lina). In the next step, the part of precipitation that evaporates on average in Germany disappears again (most of it, water is now still standing up to the top edge of the rubberboots). If you subtract the portion that corresponds to the surface effluent, about 10 cm of water height (water up to the ankle) remains, which seeps into the subsoil and forms the groundwater anew.
Explanation to the film 'Water balance Australia':
The film shows how high the water would stand on average in drier climates in comparison to Germany (values from South Australia, even if the background picture actually does not come from South Australia) if it would accumulate over a year (only up to the lower legs of the 1. 20 m tall Lina). Next, the part of the precipitation disappears (evaporates) again (almost everything, water only up to the soles of the feet). Subtracting the portion that corresponds to the above-ground runoff (about 1 cm), about 0. 3 cm of water height remain (i. e. at most a few puddles) , which seep into the subsoil and form new groundwater.
Explanation to the film 'How does it look under the ground?':
Using a sand pit as an example, the film is intended to illustrate what it often looks like underground (at least in the Geest): Below the ground, many metres of sand follow, which was deposited as meltwater sand during the iceages. Ulrike removes sand for an experiment which is supposed to show that water seeps away in such sands,or rather can flow as groundwater (as soon as the sands are at groundwater level).