The bathymetry of a lake is a crucial cornerstone to be able to conduct hydrological and ecological research in lakes. Existing bathymetric data for Lake Bolmen is now more than 30 years old and very limited in detail. A recently purchased echo sounder, which is able to measure the water depth with the help of acoustic waves, will be used in 2022 and 2023 to update current maps. Other than improved resolution for the bathymetric map, the new echo sounder will provide information on submerged aquatic vegetation cover as well as sediment composition in the lake.
The creation of a new bathymetric map for Bolmen will be very time demanding since it is necessary to measure within each little bay. Moreover, driving speed is limited to prevent measurement failures. Currently, the possibility to involve local citizens is discussed, which would significantly reduce the time of completion as well as increase local commitment to ongoing research projects.