Searched for: subject%3A%22Geophysics%22
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Dukalski, M. (author), Rovetta, D. (author), van der Linde, S.G. (author), Möller, M. (author), Neumann, N. (author), Phillipson, F. (author)
Much of recent progress in geophysics can be attributed to the adaptation of heterogeneous high-performance computing architectures. It is projected that the next major leap in many areas of science, and hence hopefully in geophysics too, will be due to the emergence of quantum computers. Finding a right combination of hardware, algorithms, and...
article 2023
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Barros, E. (author), Leeuwenburgh, O. (author), Carpentier, S. (author), Wilschut, F. (author), Neele, F. (author)
To manage risks in CO2 storage operations, monitoring systems need to be designed such that the data can inform the operator whether the storage site will continue to behave as expected or not. In order to compare the benefits of different monitoring strategies, we require a measure of ‘efficiency' that is based on a balance between monitoring...
conference paper 2018
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Ruiz-Armenteros, A.M. (author), Lazecky, M. (author), Hlavacova, I. (author), BakoAaˆ, M. (author), manuel Delgado, J. (author), Sousa, J.J. (author), Lamas-Fernandez, F. (author), Marchamalo, M. (author), Caro-Cuenca, M. (author), Papco, J. (author), Perissin, D. (author)
Dams require continuous security and monitoring programs, integrated with visual inspection and testing in dam surveillance programs. New approaches for dam monitoring focus on multi-sensor integration, taking into account emerging technologies such as GNSS, optic fiber, TLS, InSAR techniques, GBInSAR, GPR, that can be used as complementary data...
conference paper 2018
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Bording, T. (author), Christiansen, A.V. (author), Auken, E. (author), Gunnink, J.L. (author), Oude Essink, G.H.P. (author)
conference paper 2017
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Tuma, M. (author), Rorbech, V. (author), Prior, M. (author), Igel, C. (author)
We designed and jointly optimized an integrated signal processing chain for detection and classification of long-range passive-acoustic underwater signals recorded by the global geophysical monitoring network of the Comprehensive Nuclear-Test-Ban Treaty Organization. Starting at the level of raw waveform data, a processing chain of signal...
article 2016
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Bergmann, P. (author), Diersch, M. (author), Götz, J. (author), Ivandic, M. (author), Ivanova, A. (author), Juhlin, C. (author), Kummerow, J. (author), Liebscher, A. (author), Lüth, S. (author), Meekes, S. (author), Norden, B. (author), Schmidt-Hattenberger, C. (author), Wagner, F.M. (author), Zhang, F. (author)
Geophysical monitoring activities were an important component of the CO2 injection program at the Ketzin site, Germany. Here we report on the seismic and electrical resistivity tomography (ERT) measurements performed during the period of the site development and CO2 injection. Details on the site geology, the history of the CO2 injection...
article 2016
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Paap, B.F. (author), Steeghs, T.P.H. (author), Kraaijpoel, D.A. (author)
We present the results of a detailed seismic modeling study of induced seismicity observed at the Groningen gas field, situated in the North-eastern part of the Netherlands. Seismic simulations are valuable to support the interpretation of observed earthquake waveforms recordings and to increase the understanding of the underlying source...
conference paper 2016
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Gunter, W.H. (author), Maritz, B. (author), Koago, M. (author), Wainman, C.K. (author), Gardener, M.E. (author), February, F. (author), van Eijk, A.M.J. (author)
The First European South African Experiment (FESTER) was conducted over about a 10 month period at the Institute of Maritime Technology (IMT) in False Bay, South Africa. One of the important goals was the establishment of the air-sea temperature difference (ASTD) homogeneity along the main propagation link atmospheric path since it is a basic...
conference paper 2016
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Glegola, M. (author), Ditmar, P. (author), Vossepoel, F. (author), Arts, R. (author), Al-Kindy, F. (author), Klees, R. (author)
Gas-Oil Gravity Drainage is to be enhanced by steam injection in a highly fractured, low permeability carbonate field in Oman. Following a successful pilot, field-wide steam injection is being implemented, first of this type in the world. A dedicated monitoring program has been designed to track changes in the reservoir. Various observations are...
article 2015
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Pettazzi, F. (author), Bäumer, S.M.B. (author), van der Donck, J.C.J. (author), Deutz, A.F. (author)
Detection of nanoparticles is of paramount importance for contamination control in ultra-clean systems. Light scattering is a well-known detection method which is applied in many different scientific and technology domains including atmospheric physics, environmental control, and biology. It allows contactless and remote detection of sub-micron...
conference paper 2015
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Noorlandt, R.P. (author), de Kleine, M.P.E. (author), Kruiver, P.P. (author), Bakker, M.A.J. (author), Mesdag, C.S. (author), Hoogendoorn, R.M. (author)
A geophysical survey has been carried out on the Juliana Canal and levee in the south of the Netherlands. For a stretch of about 35 km along this canal various construction works are planned, to deepen and widen the canal. The canal is in a geological setting such that leakage from the canal to the surrounding landscape during the construction...
conference paper 2011
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Meekes, J.A.C. (author), Zhang, X. (author), Abdul Fattah, R. (author)
Geophysical monitoring of the dynamical behavior of subsurface reservoirs (oil, gas, CO2) remains an important issue in geophysical research. A new idea for reservoir monitoring based on electrical resistivity tomography was developed at TNO. The essential element of the so-called BSEMT (Borehole to Surface Electrical Monitoring Technique)...
conference paper 2011
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Cremer, H. (author), Bunnik, F.P.M. (author), Donders, T.H. (author), Hoek, W.Z. (author), Koolen-Eekhout, M. (author), Koolmees, H.H. (author), Lavooi, E. (author), TNO Bouw en Ondergrond (author)
A 400-year sediment record from an 18 m deep scour hole lake (Haarsteegse Wiel) near the Meuse River in the Netherlands was investigated for past changes in water quality, flooding frequency and landscape change using geophysical, geochemical and micropaleontological information. The results are highly significant for determining long-term...
article 2010
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Paap, B.F. (author), Dubelaar, C.W. (author), Gunnink, J.L. (author)
Mapping of the Dutch Wadden Sea is a major challenge as it is an intertidal zone and therefore has limited accessibility by surveying vessels. Hence, the current subsurface model of the Dutch Wadden Sea is based on a sparse density of lithological information derived from core samples and seismic data. To improve the vertical and lateral detail...
conference paper 2010
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Kruiver, P.P. (author), Westerhoff, R.S. (author), Noorlandt, R.P. (author), Hoekstra, N.N. (author), Woelders, H. (author), van Vossen, W.J. (author), TNO Bouw en Ondergrond (author)
Geophysical investigations were carried out on two modern landfill sites in the Netherlands. The objective of the geo-electrical and EM31 measurements was to reveal the effect of recirculation of leachate on homogenising moisture content in the waste to stimulate the process of attenuation. At Vlagheide, geo-electrical and EM31 measurements were...
conference paper 2009
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Arts, R.J. (author), Baradello, L. (author), Girard, J.F. (author), Kirby, G. (author), Lombardi, S. (author), Williamson, P. (author), Zaja, A. (author), TNO Bouw en Ondergrond (author)
CO2 storage in the subsurface is becoming more and more attractive as a means to reduce CO2 emissions to the atmosphere and hence minimize human-induced global warming. The ability to monitor and verify these CO2 storage reservoirs is a key element for further implementation of other storage sites. Since the current sites fortunately do not...
article 2009
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Westerhoff, R.S. (author), Noorlandt, R.P. (author), TNO Bouw en Ondergrond (author)
With the increasing amount of innovative geophysical sensors and sensor networks there is a need for faster and more controlled data processing and interpretation in order to cope with the abundance of data coming from monitoring systems. In this article, we are presenting a possible method to deal with automated processing of multi-station...
conference paper 2008
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Busschers, F.S. (author), Kasse, C. (author), van Balen, R.T. (author), van den Berghe, J. (author), Cohen, K.M. (author), Weerts, H.J.T. (author), Wallinga, J. (author), Johns, C. (author), Cleveringa, P. (author), Bunnik, F.P.M. (author), TNO Bouw en Ondergrond (author)
High-resolution continuous core material, geophysical measurements, and hundreds of archived core descriptions enabled to identify 13 Late Pleistocene Rhine-Meuse sedimentary units in the infill of the southern part of the North Sea basin (the Netherlands, northwestern Europe). This sediment record and a large set of Optical Stimulated...
article 2007
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van Vossen, R. (author), Trampert, J. (author), TNO Defensie en Veiligheid (author)
Near-surface wavefield perturbations can be very complex and completely mask the target reflections. Despite this complexity, conventional methods rely on parameterizations characterized by simple time and amplitude anomalies to compensate for these perturbations. Determining and compensating for time shifts is generally referred to as (residual...
article 2007
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Schroot, B.M. (author), Klaver, G.T. (author), Schüttenhelm, R.T.E. (author)
Expressions of gas seepage observable within North Sea seismic and acoustic data include seabed pockmarks, seepage plumes in the water column, acoustic blanking, shallow enhanced reflectors, and shallow seismic chimneys. Three areas were selected for a marine survey in
article 2005
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