In cities, large thermal plumes often limit groundwater-based heating and cooling. Unidirectional ATES reverses the well arrangement so heat and cold are transported by natural groundwater flow and reused seasonally. At Graz South Hospital, modeling shows efficient energy recovery, strongly reduced off-site impacts, and high potential for climate-friendly energy supply in space-constrained urban areas.

Climate change has negative effects on water resources. It creates conflicts among stakeholders at Lake Velence. This region is undegoing rapid urbanization and economic expansion, while includes significant wetland areas, some are under protection. It has high density of solar panel installations. Our research proposes a water transfer system, using renewable energy potential to reduce water shortages. Besides the recipient area, we also consider the protection of ecosystems at the donor area.

We introduce a novel coupling of GOLEM, a thermal-hydraulic-mechanical simulator, with the PHREEQC geochemical solver. The code is validated via benchmarks against reference 1D models and its functionalities demonstrated on a 2D geochemical heterogeneous domain. This open-source  software enables the simulation of complex subsurface processes for the development of geothermal resources.

On 7–9 January 2005 Storm Erwin passed across northern Europe, causing damage from Ireland to Russia, including power outages. Southern Sweden had the worst impacts with two nuclear stations shut-down and widespread destruction of transmission lines. For offshore wind energy in the North Sea, the storm was important to understand extreme environmental conditions for turbine operation. This work presents an analysis of North Sea tide gauge and wave data to assess extreme wave and surge levels.

Waiwera in New Zealand is a small coastal village with a geothermal reservoir underneath. Hydrogeological models support water management by providing insights into sustainable extraction from the system. It is artesian and the geothermal water is of meteoric origin percolating down to sufficient depth getting heated. It rises through a fault zone into the shallow and leaky aquifer. Most recently the springs have restarted discharging geothermal water on the beach.

We mapped pore networks in carbonate scanning-electron-microscope (SEM) images to aid safe CO₂ storage and radioactive-waste isolation. An open 29 000 × 23 000-pixel mosaic was split into 100 fully hand-labelled tiles. Eight classic computer-vision pipelines were benchmarked: Watershed gave the best recall–precision balance, and a simple Hybrid-Voting of three filters halved false alarms. The data, masks and code offer an immediate reference set for training and testing future 3-D deep-learning models.

To make better use of underground heat storage, we need to understand how water flows through deep rock layers. Normally, this is tested after drilling is finished, but we tried doing it during an earlier stage to save time and effort. At a site in Berlin, we tested a new way to measure how water moves through rock while the borehole was still being developed. The method worked well and gives quicker, reliable insights into underground conditions.

In natural hydrogen exploration, locating deep gas seepage is often done by measuring soil gas content. For that purpose, we developed a long-term hydrogen concentration monitoring instrument named MONHyTOR. Our laboratory test demonstrates its accuracy, and field data indicate that hydrogen circulation in the soil depend on soil type, water circulation in the soil, air pressure, and air temperature. MONHyTOR can prove to be a promising tool in the natural hydrogen exploration scene.

This article presents the map and dataset of critical raw materials (CRM) deposits in Europe produced within the GSEU (Geological Service for Europe) project. The map displays over 800 deposits in 33 countries. The article describes the methodology for compiling and harmonizing data, as well as a global assessment of CRM potential in Europe. It also discusses barriers of compiling and harmonizing CRM data at continental scale, and the limitations of the map and its dataset.