A5080082051- Groundwater flow and contamination studies
- Geothermal Energy Systems and Applications
- Urban Stormwater Management Solutions
- Groundwater and Isotope Geochemistry
- Computability, Logic, AI Algorithms
- Geophysical and Geoelectrical Methods
- Soil and Unsaturated Flow
- Landslides and related hazards
- NMR spectroscopy and applications
- Water Systems and Optimization
- Evolutionary Algorithms and Applications
- Cryospheric studies and observations
- Winter Sports Injuries and Performance
- Neural Networks and Applications
- Fecal contamination and water quality
- Hydrology and Watershed Management Studies
- Drilling and Well Engineering
- Hydraulic Fracturing and Reservoir Analysis
- CO2 Sequestration and Geologic Interactions
- Hydrocarbon exploration and reservoir analysis
- Landfill Environmental Impact Studies
- Granular flow and fluidized beds
- Water Treatment and Disinfection
- Karst Systems and Hydrogeology
- Integrated Energy Systems Optimization
TU Bergakademie Freiberg
2021-2024
University of Basel
2023-2024
Helmholtz Institute Freiberg for Resource Technology
2024
Wallops Flight Facility
2024
Norsk Hydro (Germany)
2023
Groundwater Center
2015-2021
TU Dresden
2015-2021
Helmholtz Centre for Environmental Research
2019-2021
Repurposing groundwater-filled mine cavities for thermal energy storage has demonstrated promising potential to buffer the imbalance of supply and demand. Fractured formations are widespread in old mines due previous excavation activities, which dominates performance efficiency (MTES) system. Therefore, understanding mechanisms fluid flow, heat, solute transport fractured reservoirs MTES system is essential its application assessment environmental impact. In this study, a 3D fracture-matrix...
Underground mines, once vital industrial hubs, hold immense potential for innovative applications, including Mine Thermal Energy Storage (MTES). MTES repurposes partially and fully flooded mine cavities as reservoirs storing surplus heat or cold, presenting a novel alternative to conventional Aquifer (ATES). While promising, faces challenges such scaling, corrosion, energy loss, interactions between the geological matrix technical infrastructure.To address these challenges, TU Bergakademie...
Abstract Leaky urban drainage networks (UDNs) exfiltrating wastewater can contaminate aquifers. Detailed knowledge on spatiotemporal distributions of water-dissolved, sewer-borne contaminants in groundwater is essential to protect aquifers and optimize monitoring systems. We evaluated the effect UDN layouts spreading using a parsimonious approach. Due UDN’s long-term leakage behavior existence non-degradable (equivalent conservative constant contaminant source), we employed concept...
Abstract Gravity‐driven infiltration into the shallow subsurface via small‐diameter wells (SDWs), i.e., with an inner diameter smaller than 7.5 cm (3 inches) and no gravel pack) has proven to be a cost‐efficient flexible tool for managed aquifer recharge (MAR), as it provides relatively high rates minimal construction effort. SDWs have significantly open filter area larger pack, making of low‐quality waters through these more at risk clogging. To investigate their susceptibility biological...
Decentralized water management requires innovative technical solutions due to restricted operational and economic resources. In this study, a combined, decentralized infiltration system in the form of closely-spaced sub-systems for precipitation treated wastewater has been numerically analyzed. Flow transport simulation shows that system, by arranging pipes closely longitudinal manner, is feasible under consideration German national guidelines both methods. Precipitation events up recurrence...
Locally collected precipitation water can be actively used as a groundwater tracer solution based on four inherent signals: electrical conductivity, stable isotopic signatures of deuterium [δ 2 H], oxygen‐18 18 O], and heat, which all may strongly differ from the corresponding background values in tested groundwater. In hydrogeological practice, test is one most important methods for determining subsurface connections or field parameters, such porosity, dispersivity, diffusion coefficient,...
The reuse of treated wastewater (e.g. for irrigation) is a common practice to combat water scarcity problems world-wide. However, the potential spread opportunistic pathogens and fecal contaminants like Enterococci within subsoil could pose serious health hazards. Additional sources (e.g., leaky sewer systems, livestock farming) aggravate this situation. This study contributes an understanding pathogen in environment, using combined modelling experimental approach. impact quartz sediment...
The use of snowmelt as an inexpensive multi-component tracer solution for active aquifer characterization is investigated, creating a valid alternative to existing artificial water isotope labelling using enriched deuterium oxide (2H2O) and water-18O (H218O). approach directly takes advantage natural differences between groundwater precipitation. It shown, at laboratory-scale small field-scale, that direct injection into porous medium allows the tracing flow and, therefore, determination...
High-resolution depth-oriented temperature measurements have been introduced to investigate a groundwater body in the urban area of Basel. In total, four devices were installed with up 16 sensors - located both saturated and unsaturated zone. Measurements performed over period 4 years provide sufficient data set calibrate high-resolution numerical local heat-transport models. Calibration was for zone, respectively. Model results show that although valuable insights into thermal processes,...
Abstract In this study, the influence of varying temperatures on transport behavior conservative solutes in heterogeneous porous media has been investigated. Column flow experiments employing potassium bromide as tracer were conducted at four temperature levels (3°C, 10°C, 20°C, and 30°C) measured electrical conductivity (EC) signal was interpreted through inverse modeling. Additional performed with deuterium‐enriched water 10°C 30°C. For those experiments, deuterium isotope ratios analyzed...
Decarbonizing the industrial and building heating cooling sectors is a crucial step toward achieving carbon neutrality, necessitating innovative sustainable solutions for over-seasonal storage of excess heat energy. With Germany alone having more than 10,000 old mines, repurposing these sites to implement controlled thermal energy strategy, known as mine-based (TES), has emerged potential solution. To effectively utilize such partially flooded artificial cavities, it fully understand...
Thermal Energy Storage (TES) has gained prominence as a viable solution for storing surplus heat and cold underground. While traditional TES systems primarily rely on natural aquifers, an emerging approach known ”Mine Storage“ (MTES) garnered attention repurposing former underground mines. Despite the promise of in both Aquifer (ATES) MTES, several operational challenges persist, including clogging, scaling, corrosion, energy loss across system boundaries. These impact...
Recently, Aquifer Thermal Energy Storage (ATES) systems gained increasing attention as a suitable storage method for local and temporary surplus thermal energy in aquifers. Among others, the success of ATES depends on properties aquifer like hydraulic permeability, conductivity, porosity. During operation, different pressure temperature conditions above below surface can cause clogging scaling processes, eventually leading to operational maintenance issues or failures. In research project...
The (over-)seasonal storage of excess heat and cold in the subsurface is considered a promising solution to manifold challenges energy transition. Many underground thermal (TES) systems are focusing on natural aquifers. In parallel, there has also been increasing attention using artificial cavities (partially) flooded mines. This special form known as mine (MTES). Like other TES systems, MTES faces several challenges. former mines actively dewatered keep defined flooding level and,...
In this article, we present a straightforward random walk model for fast evaluation of push-pull tracer tests. By developing an adaptive algorithm, overcome the problem manually defining how many particles have to be used simulate transport problem. Beside this, validate by evaluating test with drift phase and confirm results MT3DMS. The took less than 1% computational time MT3DMS, thus allowing remarkable faster