Preprints
https://doi.org/10.5194/essd-2021-139
https://doi.org/10.5194/essd-2021-139

  15 Jun 2021

15 Jun 2021

Review status: this preprint is currently under review for the journal ESSD.

Mineral, thermal and deep groundwater of Hesse, Germany

Rafael Schäffer1, Kristian Bär1, Sebastian Fischer2, Johann-Gerhard Fritsche3, and Ingo Sass1 Rafael Schäffer et al.
  • 1Geothermal Science and Technology, Technical University of Darmstadt, Darmstadt, 64287, Germany
  • 2Federal Institute for Geosciences and Natural Resources, Berlin, 13593, Germany
  • 3Hessian Agency for Nature Conservation, Environment and Geology, Wiesbaden, 65203, Germany

Abstract. The composition of mineral, thermal or deep groundwaters is of interest for several geotechnical applications, such as drinking water supply, spas or geothermal energy. A verified and reliable knowledge of temperature, pH, hydrochemical composition and other parameters is crucial to extract fluids with as few technical problems as possible and exploit groundwater reservoirs economically and environmentally sustainable. However, at sites where empirical data are lacking, the correct prediction of fluid properties is often difficult, resulting in considerable economic risks. Here we present the first comprehensive and publicly available database of mineral, thermal and deep groundwaters of Hesse compiled from published and own data. Presently, it contains 1035 datasets from 560 different springs or wells sampled since 1810. A dataset consists of metadata like location, altitude, depth, rock type or stratigraphic unit, information on the water type, references, physical-chemical parameters, concentrations of major, minor and trace elements, content of dissolved and free gases as well as isotope data. The dataset allows the evaluation of time series and distribution of groundwater properties both laterally and vertically. We show a simple statistical evaluation based on the five major hydrogeological regions of Hesse. Our database can be used to re-evaluate genesis and circulation of deep groundwaters, to estimate reservoir temperatures with a solution geothermometer, or to assess groundwater ages by means of isotope data. It can also be useful for a first conception of deep geothermal utilizations. In future, an update and extension of the database is intended.

Rafael Schäffer et al.

Status: open (until 11 Aug 2021)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on essd-2021-139', Anonymous Referee #1, 07 Jul 2021 reply
  • RC2: 'Mineral, thermal and deep groundwater of Hesse, Germany', Anonymous Referee #2, 09 Jul 2021 reply
  • RC3: 'Comment on essd-2021-139', Mirko Mälicke, 14 Jul 2021 reply

Rafael Schäffer et al.

Data sets

Database of Mineral, Thermal and Deep Groundwaters of Hesse, Germany Rafael Schäffer, Kristian Bär, Sebastian Fischer, Johann-Gerhard Fritsche, Ingo Sass https://tudatalib.ulb.tu-darmstadt.de/handle/tudatalib/2508

Rafael Schäffer et al.

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Short summary
Knowledge of groundwater properties are relevant e.g. for drinking water supply, spas or geothermal energy. We compiled groundwater data almost exclusively from publications resulting in 1035 datasets from 560 springs or wells sampled since 1810. The database is useful to describe spatial or temporal variation of groundwater composition and to reduce uncertainties. It also serves to re-evaluate the movement of deep groundwaters or the estimate its characteristics such as temperature and age.