Abstract: The influence of sedimentary heterogeneity on the diffusion of radionuclides in the sandy facies of Opalinus Clay at the field scale Chaofan Chen, Tao Yuan, Renchao Lu, Cornelius Fischer, Olaf Kolditz, and Haibing Shao Adv. Geosci., 58, 77–85, https://doi.org/10.5194/adgeo-58-77-2022, 2022 The moving distance of the diffusion front is farther away the canister center, along the direction with the neighboring layer having lower diffusion coefficient. When the bedding angle increases, the diffusion front moves farther in z+ direction, reflecting the increase in effective diffusivity and higher impact of parallel-to-bedding diffusion. The neighboring layers can slightly reshape the diffusion front line of the radionuclide. PubDate: Wed, 23 Nov 2022 18:00:56 +010 DOI: 10.5194/adgeo-58-77-2022 2022
Abstract: Environmental hazard quantification toolkit based on modular numerical simulations Morgan Tranter, Svenja Steding, Christopher Otto, Konstantina Pyrgaki, Mansour Hedayatzadeh, Vasilis Sarhosis, Nikolaos Koukouzas, Georgios Louloudis, Christos Roumpos, and Thomas Kempka Adv. Geosci., 58, 67–76, https://doi.org/10.5194/adgeo-58-67-2022, 2022 The quantification of the impacts on the environment and human health is a crucial prerequisite for geological sub-surface utilisation projects. With the presented approach, the shortcomings of using conceptually simplified models are substantially reduced, since subsurface complexities are accounted for. The transparency of the assessment basis should generally increase the acceptance of geoengineering projects, considered one of the crucial aspects for geological subsurface utilisation. PubDate: Tue, 22 Nov 2022 18:00:56 +010 DOI: 10.5194/adgeo-58-67-2022 2022
Abstract: Numerical Analysis of Potential Contaminant Migration from Abandoned In Situ Coal Conversion Reactors Christopher Otto, Svenja Steding, Morgan Tranter, Torsten Gorka, Mária Hámor-Vidó, Wioleta Basa, Krzysztof Kapusta, István Kalmár, and Thomas Kempka Adv. Geosci., 58, 55–66, https://doi.org/10.5194/adgeo-58-55-2022, 2022 For a potential utilisation of coal resources located in Hungary, an assessment of groundwater pollution resulting from a water-borne contaminant pool has been undertaken. A sensitivity analysis was carried out by means of numerical simulations. Simulation results demonstrate that fluid flow via the regional faults is the main driver for a potential contamination of shallow groundwater aquifers. A parameter correlation analysis is presented. PubDate: Mon, 21 Nov 2022 18:00:56 +010 DOI: 10.5194/adgeo-58-55-2022 2022
Abstract: ASSET project: assessing sustainable urban drainage system (SUDS) efficiency to reduce urban runoff water contamination Laura Scheiber, Marc Teixidó, Rotman Criollo, Francesc Labad, Enric Vázquez-Suñé, María Izquierdo, María José Chesa Marro, and Daniel de Castro Adv. Geosci., 59, 37–44, https://doi.org/10.5194/adgeo-59-37-2022, 2022 The knowledge of the aquifer characteristics and its quality together with these vulnerable areas may lead to improve the installation of SUDS, reducing the input of contaminants through these infrastructures. The implementation of this methodology aims to facilitate water users and urban managers to control their potential negative effects on the receiving water body. In addtion, the outcomes of its application may be used to optimize the groundwater management in the city. PubDate: Fri, 18 Nov 2022 11:43:50 +010 DOI: 10.5194/adgeo-59-37-2022 2022
Abstract: Protection of peri-urban groundwater catchments: a multi-tracer approach for the identification of urban pollution sources Laura Balzani, Philippe Orban, and Serge Brouyère Adv. Geosci., 59, 27–35, https://doi.org/10.5194/adgeo-59-27-2022, 2022 The project develops an integrated methodology to optimise the protection of groundwater catchments from urban pollution. This requires identifying their origins which are not always known, characterising composition and importance in terms of pollutant load, assessing current/future risks for the environment and the catchment itself, and the need for remediation. To do so, a combination of tracers and approaches has been applied and a decision-making reference system is going to be developed. PubDate: Fri, 18 Nov 2022 11:43:50 +010 DOI: 10.5194/adgeo-59-27-2022 2022
Abstract: Insights on the hydrological cycle and its interaction with anthropic pressures: the Katari basin and minor Titicaca lake Rotman A. Criollo Manjarrez, Laura Scheiber, Laura Poza, Sonia Valdivielso Mijangos, Pedro Simunovic, and Enric Vázquez-Suñé Adv. Geosci., 59, 17–25, https://doi.org/10.5194/adgeo-59-17-2022, 2022 In the current climate and socioeconomic context, The Katari and Minor Lake Titicaca basin (Bolivia) has special interest because of the sensitive and vulnerable environment and ecosystems around the Titicaca Lake. These environments support traditional local human populations and other beneficial human activities. That is why we made workshops with local authorities and performed a global vision of the aquifer behavior and its vulnerability, which would generate a better decision-make process. PubDate: Tue, 15 Nov 2022 11:41:49 +010 DOI: 10.5194/adgeo-59-17-2022 2022
Abstract: Upwelling mechanisms of deep saline waters via Quaternary erosion windows considering varying hydrogeological boundary conditions Elena Chabab, Michael Kühn, and Thomas Kempka Adv. Geosci., 58, 47–54, https://doi.org/10.5194/adgeo-58-47-2022, 2022 The present study, uses density-driven flow and transport models to evaluate mechanisms of saline water intrusion from deep aquifers into the freshwater column used for drinking water supply under different boundary conditions and for a specific site in the German Federal State of Brandenburg. Results show that mainly decreasing groundwater recharge leads to increased and earlier salinisation which highlights the need for waterworks to initiate effective countermeasures quickly and in time. PubDate: Mon, 14 Nov 2022 12:21:00 +010 DOI: 10.5194/adgeo-58-47-2022 2022
Abstract: Laboratory assessment of corrosion rate of carbon steel ground heat exchangers Gianluca Cadelano, Alessandro Bortolin, Eloisa Di Sipio, Giovanni Ferrarini, Paolo Bison, Adriana Bernardi, Giorgia Dalla Santa, and Antonio Galgaro Adv. Geosci., 58, 41–46, https://doi.org/10.5194/adgeo-58-41-2022, 2022 Within the Cheap-GSHPs and GEO4CIVHIC projects, innovations were advanced in the field of ground heat exchangers design for shallow geothermal systems. Among these, a metallic type has been proposed that can be installed in direct contact with the underground. As carbon steel is prone to corrosion and corrosivity varies based on site-specific underground conditions, a laboratory assessment methodology was applied to metal samples to assess the corrosion rate and forecast the durability. PubDate: Fri, 11 Nov 2022 15:36:34 +010 DOI: 10.5194/adgeo-58-41-2022 2022
Abstract: Geographic Information System (GIS) as a basis for the next generation of hydrogeological models to manage the geothermal area Waiwera (New Zealand) Michael Kühn, Melissa Präg, Ivy Becker, Christoph Hilgers, Andreas Grafe, and Thomas Kempka Adv. Geosci., 58, 31–39, https://doi.org/10.5194/adgeo-58-31-2022, 2022 The geothermal hot water reservoir below the small town of Waiwera in New Zealand has been known to the indigenous Maori for many centuries. Overproduction by European immigrants led to a water level decrease and consequently artesian flow from the wells and the seeps on the beach ceased. The Te Kaunihera o Tāmaki Makaurau Auckland Council established the Waiwera Thermal Groundwater Allocation and Management Plan to allow the geothermal system to recover. PubDate: Tue, 08 Nov 2022 13:27:06 +010 DOI: 10.5194/adgeo-58-31-2022 2022
Abstract: Verification of TRANSPORT Simulation Environment coupling with PHREEQC for reactive transport modelling Thomas Kempka, Svenja Steding, and Michael Kühn Adv. Geosci., 58, 19–29, https://doi.org/10.5194/adgeo-58-19-2022, 2022 The TRANsport Simulation Environment (TRANSE) was coupled with the geochemical reaction module PHREEQC, providing multiple new features that make it applicable to complex reactive transport problems in various geoscientific fields. Two computationally demanding and complex geochemical benchmarks were used in the present study to successfully verify the code implementation. PubDate: Thu, 03 Nov 2022 07:02:53 +010 DOI: 10.5194/adgeo-58-19-2022 2022
Abstract: Reactive transport simulations of uranium migration in the Opalinus Clay depend on ion speciation governed by underlying thermodynamic data Theresa Hennig and Michael Kühn Adv. Geosci., 58, 11–18, https://doi.org/10.5194/adgeo-58-11-2022, 2022 Safety assessments must demonstrate that radionuclides in potential disposal sites are retained within the containment providing rock zone using reactive transport simulations. Here, this is quantified for the example of uranium in the hydrogeological system of the Opalinus Clay at Mont Terri. Our work clearly shows how sensitive migration lengths resulting from simulations are to the model conceptualisation and selection of underlying data. PubDate: Thu, 20 Oct 2022 09:54:54 +020 DOI: 10.5194/adgeo-58-11-2022 2022
Abstract: Influence of shallow geothermal energy on the behaviour of organic contaminants of emerging concern in urban aquifers Estanislao Pujades, Laura Scheiber, Marc Teixidó, Rotman Criollo, Olha Nikolenko, Victor Vilarrasa, Enric Vázquez-Suñé, and Anna Jurado Adv. Geosci., 59, 9–15, https://doi.org/10.5194/adgeo-59-9-2022, 2022 This paper explores the impact of low enthalpy geothermal energy (LEGE) on the behaviour of organic contaminants of emerging concern (CECs). Specifically, we investigate the impact of LEGE on phenazone that is an analgesic drug commonly reported in urban aquifers. CECs pose a risk for the environment and human health, and thus, they must be eliminated to increase the available fresh-water resources in urban areas, where water scarcity is a matter of concern due to the population growth. PubDate: Wed, 19 Oct 2022 09:54:54 +020 DOI: 10.5194/adgeo-59-9-2022 2022
Abstract: Occurrence of pharmaceuticals and risk assessment in urban groundwater Anna Jurado, Francesc Labad, Laura Scheiber, Rotman Criollo, Olha Nikolenko, Sandra Pérez, and Antoni Ginebreda Adv. Geosci., 59, 1–7, https://doi.org/10.5194/adgeo-59-1-2022, 2022 The occurrence of pharmaceuticals was investigated in an urban aquifer that might be a resource for water supply. Among the 92 pharmaceuticals, 35 were detected in all groundwater samples, ranging from the low ng/L to 44.5 µg/L. The concentration of some substances decreased along the bank filtration, suggesting the occurrence of natural attenuation processes. Finally, risk quotients showed that these substances did not pose a risk to human health at groundwater measured concentrations. PubDate: Fri, 14 Oct 2022 09:59:29 +020 DOI: 10.5194/adgeo-59-1-2022 2022
Abstract: Hysteresis in permeability evolution simulated for a sandstone by mineral precipitation and dissolution Maria Wetzel, Thomas Kempka, and Michael Kühn Adv. Geosci., 58, 1–10, https://doi.org/10.5194/adgeo-58-1-2022, 2022 Porosity-permeability relations are simulated for a precipitation-dissolution cycle in a virtual sandstone. A hysteresis in permeability is observed depending on the geochemical process and dominating reaction regime, whereby permeability varies by more than two orders of magnitude. Controlling parameters for this hysteresis phenomenon are the closure and re-opening of micro-scale flow channels, derived from changes in pore throat diameter and connectivity of the pore network. PubDate: Tue, 11 Oct 2022 21:15:20 +020 DOI: 10.5194/adgeo-58-1-2022 2022
Abstract: Statistical approach to assess radon-222 long-range atmospheric transport modelling and its associated gamma dose rate peaks Arnaud Quérel, Khadija Meddouni, Denis Quélo, Thierry Doursout, and Sonia Chuzel Adv. Geosci., 57, 109–124, https://doi.org/10.5194/adgeo-57-109-2022, 2022 A radon long-range atmospheric transport modelling is set up from soil (exhalation) to soil (deposition of its progeny) and the consequent ambient gamma dose rate is evaluated. The whole is statistically assessed in regards to more than 15 000 gamma dose rate peaks. The model has proven to be of the correct magnitude, with room for substantial improvements. It may be used to validate an atmospheric transport modelling and to test any exhalation maps of radon at continental scale. PubDate: Wed, 27 Jul 2022 18:00:36 +020 DOI: 10.5194/adgeo-57-109-2022 2022
Abstract: Experimental and Simulated Spectral Gamma-Ray Response of a NaI(Tl) Scintillation Detector used in Airborne Gamma-Ray Spectrometry David Breitenmoser, Gernot Butterweck, Malgorzata Magdalena Kasprzak, Eduardo Gardenali Yukihara, and Sabine Mayer Adv. Geosci., 57, 89–107, https://doi.org/10.5194/adgeo-57-89-2022, 2022 Airborne Gamma-Ray spectrometry (AGRS) is a rapid method to identify and quantify natural as well as man-made radionuclides in large areas. The quantitative response of a standard AGRS detection system was simulated with the Monte Carlo radiation transport code FLUKA. Based on validation measurements with radiation sources, the simulation results show superior accuracy compared to previous models. The validated model can be used for an improved calibration of AGRS systems. PubDate: Fri, 24 Jun 2022 12:37:39 +020 DOI: 10.5194/adgeo-57-89-2022 2022
Abstract: Indoor/outdoor air exchange affects indoor radon – the use of a scale model room to develop a mitigation strategy Carlo Lucchetti, Gianfranco Galli, and Paola Tuccimei Adv. Geosci., 57, 81–88, https://doi.org/10.5194/adgeo-57-81-2022, 2022 Indoor/outdoor air exchange on indoor radon concentration was investigated. We evaluated the effect of air exchange on radon concentration in a scale model room. Air introduction was more effective than air extraction to reduce indoor radon, especially at higher flow rates. The presence of plasterboard shields on the inner walls of the room improved the results. This suggests that the combined use of inner coatings and outdoor air introduction are a good strategy for radon mitigation. PubDate: Wed, 15 Jun 2022 10:49:56 +020 DOI: 10.5194/adgeo-57-81-2022 2022
Abstract: Portable two-filter dual-flow-loop 222Rn detector: stand-alone monitor and calibration transfer device Scott D. Chambers, Alan D. Griffiths, Alastair G. Williams, Ot Sisoutham, Viacheslav Morosh, Stefan Röttger, Florian Mertes, and Annette Röttger Adv. Geosci., 57, 63–80, https://doi.org/10.5194/adgeo-57-63-2022, 2022 There is a growing need in health and climate research for high-quality radon observations. A variety of radon monitors, with different uncertainties, operate across global networks. Better compatibility between the measurements is required. Here we describe a novel, portable two-filter radon monitor with a calibration traceable to the International System of Units, and demonstrate the transfer of a traceable calibration from this instrument to a separate monitor under field conditions. PubDate: Wed, 18 May 2022 12:20:59 +020 DOI: 10.5194/adgeo-57-63-2022 2022
Abstract: The role of risk communication in radon mapping, risk assessment and mitigation activities in Sardinia (Italy) Liliana Cori, Elisa Bustaffa, Massimo Cappai, Olivia Curzio, Ivana Dettori, Natalina Loi, Pierpaolo Nurchis, Augusto Sanna, Grazia Serra, Elio Sirigu, Marcello Tidore, and Fabrizio Bianchi Adv. Geosci., 57, 49–61, https://doi.org/10.5194/adgeo-57-49-2022, 2022 Sardinia Region promoted a plan to protect the population from exposure to radon gas. Communication activities are ancillary to develop the whole monitoring and risk identification, a work in collaboration among professionals, a dialogue with policy-makers and the community in general, to develop awareness and prevention. Strengths, weaknesses and lessons learned are shown. PubDate: Thu, 28 Apr 2022 10:09:25 +020 DOI: 10.5194/adgeo-57-49-2022 2022
Abstract: Radon metrology for use in climate change observation and radiation protection at the environmental level Stefan Röttger, Annette Röttger, Claudia Grossi, Arturo Vargas, Ute Karstens, Giorgia Cinelli, Edward Chung, Dafina Kikaj, Chris Rennick, Florian Mertes, and Ileana Radulescu Adv. Geosci., 57, 37–47, https://doi.org/10.5194/adgeo-57-37-2022, 2022 Radon gas is the largest source of public exposure to naturally occurring radioactivity. Radon can also be used, as a tracer to improve indirectly the estimates of greenhouse gases important for supporting successful GHG mitigation strategies.Both climate and radiation protection research communities need improved traceable low-level atmospheric radon measurements. The EMPIR project 19ENV01 traceRadon started to provide the necessary measurement infrastructure and transfer standards. PubDate: Thu, 10 Mar 2022 12:41:30 +010 DOI: 10.5194/adgeo-57-37-2022 2022
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