The Hunsfels is a former limestone quarry and a young body of water that was created because the groundwater vein was hit during blasting work. The 54m deep, flooded quarry then filled with groundwater and has been open to divers since March 2020. The groundwater vein is still pressing into the lake, so that conclusions can be drawn about the hinterland and the water catchment area. We would like to document the newly formed lake in the long term and collect data of all kinds: flow measurements at the springs, temperature measurements at various depths, visual measurements at various depths, development of flora and fauna, determination and morphological changes to the existing rocks and minerals due to the aquatic environment, 3D model creation and photogrammetry. We plan on documenting the change of the lake for the long term. This will be done year-round and as part of a large team. The Hunsfels is of great importance for us, because it is one of the few lakes in central/west Germany, which has not been over dived, where all different trained divers come together, no matter what level, and because of its depth it offers many diving possibilities.
We installed 3 secchi disks to measure the visibility in different parts of the lake: From shallow to deep and from places that are regularly dived to places hardly dived. We can see, which influence diving has on the visibility (and with this on the plants covered by silt) and how the visibility changes in winter at different depths - in cold water algae disappear. Baggersee Diez is an abandoned querry which is fed by groundwater. It is used for diving and swimming as well.