Background information on the joint projects


Isotope map (IsoGW)

The LURCH joint project "IsoGW" is working to develop a high-resolution and dynamically adaptable isotope distribution map for stable water isotopes (δ18O and δ2H) and tritium concentrations (3H) of groundwater throughout Germany. This isotope map, also called "isoscape", is not yet available in Germany.

By combining the isotope distributions of precipitation, surface waters and groundwater, hydrological processes such as the recharge of groundwater can be specifically identified and questions about drinking water production from bank filtrate can be answered. The isotope map and the underlying database thus provide valuable tools for sustainable groundwater management in Germany.

The isotope map is produced through comprehensive data research, including existing data from the state offices, literature and new measurement campaigns. The collected data will be compiled in a public database and continuously updated. The long-term goal of the project is to make this data available to the public free of charge and freely accessible.

The development of an area-wide isotope map of groundwater in Germany enables us to deepen our understanding of hydrological processes, especially against the background of changing land uses and climate change. It is an important step towards sustainable use and management of our valuable water resources.

Figure: Distribution map of the deutierum isotopes of rain over Germany (annual mean). Similarly, an isotope map of groundwater is to be created in the future. Data basis: GNIP (Global Network of isotopes in precipitation), IAEA Vienna


iMolch: Innovative monitoring

Did you know that there are about 100,000 potential substances in the aquatic environment? The iMolch project is developing a comprehensive indicator concept to efficiently assess the water quality and quantity of groundwater.
It is impossible to measure all substances, as this would represent an enormous cost factor. Therefore, iMolch focuses on selected substances that have a high information content and can provide information about processes and pollutant sources in groundwater. Through this innovative indicator concept, more targeted strategies can be developed to reduce contamination. Stay tuned to learn more about iMolch's fascinating research!

Image source: Pexels, Chokniti Khongchum

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CHARMANT: The groundwater fauna

Did you know that an entire ecosystem lies hidden beneath our feet? Despite complete darkness, lack of space and food, groundwater harbors a variety of fascinating creatures that play a crucial role in the quality of our precious water resource.

Groundwater fauna consists of a wide variety of organisms including tiny microbes, insect larvae, crustaceans, and even small fish. These invisible heroes of groundwater perform important functions.


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