We studied how the chemical composition of water in rocks affects the movement of uranium, which is important for the safety of nuclear waste disposal sites. Using computer models, we found that water chemistry inside the host rock for the waste is more decisive for the transport of uranium than groundwater chemistry in adjacent rocks. These findings help improve site selection for a disposal site by indicating which conditions are suitable and less suitable to safely isolate radioactive waste.

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.