Mineral, thermal and deep groundwater of Hesse, Germany

[摘要] The composition of mineral, thermal or deep groundwaters is of interest for several geotechnical applications, such as drinking-water supply, spasor geothermal energy. Verified and reliable knowledge of temperature, pH, hydrochemical composition and other parameters is crucial to extractfluids with as few technical problems as possible and exploit groundwater reservoirs economically and environmentally sustainably. However, atsites where empirical data are lacking, the correct prediction of fluid properties is often difficult, resulting in considerable economicrisks. Here we present the first comprehensive and publicly available database of mineral, thermal and deep groundwaters of Hesse compiled frompublished and our own data. Presently, it contains 1035 datasets from 560 different springs or wells sampled since 1810. A dataset consists of metadatalike location; altitude; depth; rock type or stratigraphic unit; information on the water type; references; physical–chemical parameters;concentrations of major, minor and trace elements; and content of dissolved and free gases as well as isotope data. The dataset allows the evaluation oftime series and distribution of groundwater properties both laterally and vertically. We show a simple statistical evaluation based on the fivemajor hydrogeological regions of Hesse. Our database can be used to re-evaluate genesis and circulation of deep groundwaters, to estimate reservoirtemperatures with a solution geothermometer, or to assess groundwater ages by means of isotope data. It can also be useful for a first conception ofdeep geothermal utilization. In the future, an update and extension of the database is intended. The database of mineral, thermal and deep groundwaters of Hesse has been made available by Schäffer et al. (2020) in xlsx and csv file format atTUdatalib, https://doi.org/10.25534/tudatalib-340 . The second updated version of the database can be accessed directly at https://tudatalib.ulb.tu-darmstadt.de/handle/tudatalib/2508.2 (last access: 20 October 2021).

[学科分类] 眼科学