Searched for: department%3A%22Geoscience%255C+and%255C+Engineering%22
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Mueller, C. (author), Smilde, P. (author), Werthmüller, D. (author), Becker, V. (author), Krieger, M. (author)
To optimize geological structures a multi-physics inversion of electromagnetic and gravity data is carried out. With the TERRASYS’ Joint Inversion Framework JIF and its modules for 3D EM (here CSEM) and for 3D GRAV (gravity and gradients) the geometry of a salt body located in the Nordkapp Basin is optimized. The physical effects of a complex...
conference paper 2023
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Naranjo, D. (author), Parisi, Laura (author), Jónsson, Sigurjón (author), Jousset, Philippe (author), Werthmüller, D. (author), Weemstra, C. (author)
The timing of the recordings of ocean-bottom seismometers (OBSs) is critical for accurate earthquake location and Earth model studies. GNSS signals, however, cannot reach OBSs deployed at the ocean bottom. This prevents their clocks from being synchronized with a known reference time. To overcome this, we developed OCloC, a Python package that...
abstract 2023
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Eltayieb, M.F.M.I. (author), Werthmüller, D. (author), Drijkoningen, G.G. (author), Slob, E.C. (author)
Tracking temperature changes by measuring the resulting resistivity changes inside low-enthalpy reservoirs is crucial to avoid early thermal breakthroughs and maintain sustainable energy production. The controlled-source electromagnetic method (CSEM) allows for the estimation of sub-surface resistivity. However, it has not yet been proven that...
journal article 2023
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van Rooijen, W.A. (author), Habibi, P. (author), Xu, K. (author), Dey, P. (author), Vlugt, T.J.H. (author), Hajibeygi, H. (author), Moultos, O. (author)
Data for several key thermodynamic and transport properties needed for technologies using hydrogen (H<sub>2</sub>), such as underground H<sub>2</sub> storage and H<sub>2</sub>O electrolysis are scarce or completely missing. Force field-based Molecular Dynamics (MD) and Continuous Fractional Component Monte Carlo (CFCMC) simulations are...
journal article 2023
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Heimovaara, T.J. (author), Gebert, J. (author), Kanen, A.C. (author), Meza Ramos, P.N. (author)
In-situ stabilization of waste bodies can be achieved by the infiltration of water or recirculation of leachate into the landfill, which is thought to enhance the microbial degradation of waste organics by (re-)moisturizing dry zones and flushing out metabolic products of organic matter decay. The success of in-situ stabilization should reflect...
conference paper 2023
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Andrade Corona, C.F. (author), Dieudonné, A.A.M. (author), Gebert, J. (author), Heimovaara, T.J. (author)
Nitrogen undergoes multiple biogeochemical transformations during waste degradation, which depend on speciation, prevailing geochemical boundary conditions, and waste surface properties. This study developed a waste biodegradation model with high flexibility in accommodating reaction pathways to assess different process dynamics. The model was...
conference paper 2023
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Li, Y. (author), Slob, E.C. (author), Werthmüller, D. (author), Wang, Lipeng (author), Lu, Hailong (author)
Natural gas hydrates have been an unconventional source of energy since the beginning of this century. Gas-hydrate-filled reservoirs show higher resistivity values compared with water-filled sediments. Their presence can be detected using marine controlled-source electromagnetic methods. We classify acquisition configurations into stationary and...
journal article 2023
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Wang, Y. (author), Hosseinimehr, S.M. (author), Marelis, A.A. (author), Hajibeygi, H. (author)
We develop a multiscale simulation strategy, namely, algebraic dynamic multilevel (ADM) method, for simulation of fluid flow and heat transfer in fractured geothermal reservoirs under varying thermodynamic conditions. Fractures with varying conductivities are modeled using the projection-based embedded discrete fracture model (pEDFM) in an...
journal article 2023
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Eltayieb, M.F.M.I. (author), Werthmüller, D. (author), Drijkoningen, G.G. (author), Slob, E.C. (author)
Delft geothermal project (DAPwell) is a planned geothermal well doublet, where relatively cold water is going to be injected through one well into a low enthalpy geothermal reservoir to produce hot water from the other well. The volume of the cold water around the injection well will increase over time and, in the end, result in a thermal...
abstract 2022
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Kortleve, Anniek J. (author), Mogollón, José M. (author), Heimovaara, T.J. (author), Gebert, J. (author)
Urbanization influences soil carbon (C) stocks and flows, which, in turn, affect soil-derived ecosystem services. This paper explores soil C storage in urban greenspaces in the Dutch city of The Hague along a transect from the suburban seaside towards the city centre, reflecting a toposequence from dune to peaty inland soils. C storage and C...
journal article 2022
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Meza Ramos, P.N. (author), Lammen, Hans (author), Cruz, Carmen (author), Heimovaara, T.J. (author), Gebert, J. (author)
In-situ aeration of landfills accelerates biodegradation of waste organic matter and hence advances waste stabilization. The spatial outreach of aeration greatly affects stabilization efficiency. This study analyzed the spatial variability of gas composition and flow in 230 wells spread over four compartments of a Dutch landfill which is...
journal article 2022
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Zander, F. (author), Groengroeft, A. (author), Eschenbach, A. (author), Heimovaara, T.J. (author), Gebert, J. (author)
Anaerobic sediment organic matter decay generates methane, delays sediment consolidation, reduces sediment density, viscosity and shear strength, all impacting the sediment rheological parameters and the navigable depth. This study quantifies the share of anaerobically and aerobically degradable sediment organic matter (SOM) in a depth...
journal article 2022
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Zhou, Jianchao (author), Laumann, S.J. (author), Heimovaara, T.J. (author)
This study presents a novel geotechnical engineering approach that utilizes naturally occurring processes to reduce soil permeability in-situ. This approach is inspired by a soil stratification process (Podzolization), where a low permeability layer is formed by metal-organic matter precipitates. In a field experiment, a direct aluminum...
journal article 2022
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Wijdeveld, Arjan J. (author), Schipper, Cor A. (author), Heimovaara, T.J. (author)
Abstract: The use of sediments as soils is an area of interest for Beneficial Use of dredged sediments. In this study the impact of the transition from sediments to soils is researched by looking at the seasonal and long year (10 year) change in pore water metal chemistry of sediments which are considered clean (class A) according to the...
journal article 2022
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Chavez Olalla, J.F. (author), Winkels, T. G. (author), Ngan-Tillard, D.J.M. (author), Heimovaara, T.J. (author)
The geometric variability of soil layers is a large source of uncertainty in the reliability assessment of dikes. Because direct samples of the subsurface soils are often insufficient to capture the complexity of the subsurface, geophysical methods provide a powerful source of complementary information. A combined approach to estimate the...
journal article 2021
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Slob, E.C. (author), Draganov, D.S. (author), Eltayieb, M.F.M.I. (author), Drijkoningen, G.G. (author), Werthmüller, D. (author), Ghose, R. (author)
Difficulties in detecting and characterising shallow objects close the surface with seismic shear waves are often problematic because of dominant surface waves. By sequencing a specific combination of two data driven processing steps followed by diffraction tomography can overcome these problems. Small scattering objects become visible in the...
conference paper 2021
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Wu, S. (author), Verschuur, D.J. (author), Blacquière, G. (author)
In seismic exploration methods, imperfect spatial sampling at the surface causes a lack of illumination at the target in the subsurface. The hampered image quality at the target area of interest causes uncertainties in reservoir monitoring and production, which can have a substantial economic impact. Especially in the case of a complex...
journal article 2021
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Zander, F. (author), Heimovaara, T.J. (author), Gebert, J. (author)
Purpose: The microbial turnover of sediment organic matter (OM) in ports and waterways impacts water quality, sonic depth finding and presumably also rheological properties as well as greenhouse gas emissions, especially if organic carbon is released as methane. As a consequence, sediment management practices as a whole are affected. This...
journal article 2020
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van Turnhout, A.G. (author), Oonk, Hans (author), Scharff, Heijo (author), Heimovaara, T.J. (author)
In order to reduce the environmental and financial burden for future generations, approaches are needed to shorten aftercare of landfills. Aeration of the waste-body is a promising approach, however, the poor understanding of transport of gas and water through a waste-body makes it difficult to design an effective aeration strategy. The aim of...
journal article 2020
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Zhou, Jianchao (author), Laumann, S.J. (author), Heimovaara, T.J. (author)
Using naturally occurring processes to modify the engineering properties of the subsurface has received increasing attention from industry and research communities as they aid in the development of cost-effective, robust and sustainable engineering technologies. In line with this trend, we propose to use precipitates of aluminum (Al) and organic...
journal article 2019
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