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Meekes, J.A.C. (author), Gunnink, J.L. (author)TNO heeft opdracht gekregen van Koninklijke Smals NV voor het uitvoeren van onderzoek met de tTEM methode voor het detecteren van breuken in de ondergrond ten noorden Boerdonk. Smals is voornemens ter plaatse zand te winnen uit de Formatie van Beegden. In het gebied zijn in het verleden breuken gekarteerd, echter de precieze ligging en het...report 2022
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Gunnink, J.L. (author), Meekes, J.A.C. (author)De lithologische samenstelling van de ondergrond is van belang voor verschillende geotechnische en hydrologische toepassingen. Zo is de ligging en kennis over de continuïteit van kleilagen in de bovenste 60m vaak cruciaal om doelgerichte maatregelen te ontwerpen. Met de nieuwe tTEM kan de opbouw van de ondergrond snel in beeld worden gebracht.other 2021
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Gunnink, J.L. (author), Pham, H.V. (author), Oude Essink, G.H.P. (author), Bierkens, M.F.P. (author)Over the last decades, economic developments in the Vietnamese Mekong Delta have led to a sharp increase in groundwater pumping for domestic, agricultural and industrial use. This has resulted in alarming rates of land subsidence and groundwater salinization. Effective groundwater management, including strategies to work towards sustainable...article 2021
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Fokker, P.A. (author), Gunnink, J.L. (author), Koster, K. (author), de Lange, G. (author)The natural surface area of many coastal and delta plains has been increased by land reclamation in response to growing populations. These reclaimed lands are often experiencing subsidence. The reclaimed South Flevopolder in the coastal plain of the Netherlands has experienced severe subsidence after its reclamation in 1968. The subsidence is...article 2019
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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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Revil, A. (author), Coperey, A. (author), Shao, Z. (author), Florsch, N. (author), Fabricus, I.L. (author), Deng, Y. (author), Delsman, J.R. (author), Pauw, P.S. (author), Karaoulis, M. (author), de Louw, P.G.B. (author), van Baaren, E.S. (author), Dabekaussen, W. (author), Menkovic, A. (author), Gunnink, J.L. (author)The complex conductivity of soils remains poorly known despite the growing importance of this method in hydrogeophysics. In order to fill this gap of knowledge, we investigate the complex conductivity of 71 soils samples (including four peat samples) and one clean sand in the frequency range 0.1 Hz to 45 kHz. The soil samples are saturated with...article 2017
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Kruiver, P.P. (author), Wiersma, A. (author), Kloosterman, F.H. (author), de Lange, G. (author), Korff, M. (author), Stafleu, J. (author), Harting, R. (author), Gunnink, J.L. (author), Green, R.A. (author), van Elk, J. (author), Doornhof, D. (author)The shallow subsurface of Groningen, the Netherlands, is heterogeneous due to its formation in a Holocene tidal coastal setting on a periglacially and glacially inherited landscape with strong lateral variation in subsurface architecture. Soft sediments with low, small-strain shear wave velocities (VS30 around 200ms-1) are known to amplify...article 2017
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Kruiver, P.P. (author), van Dedem, E. (author), Romijn, R. (author), de Lange, G. (author), Korff, M. (author), Stafleu, J. (author), Gunnink, J.L. (author), Rodriguez-Marek, A. (author), Bommer, J.J. (author), van Elk, J. (author), Doornhof, D. (author)A regional shear-wave velocity (VS) model has been developed for the Groningen gas field in the Netherlands as the basis for seismic microzonation of an area of more than 1000 km2. The VS model, extending to a depth of almost 1 km, is an essential input to the modelling of hazard and risk due to induced earthquakes in the region. The detailed VS...article 2017
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Fokker, P.A. (author), Gunnink, J.L. (author), de Lange, G. (author), Leeuwenburgh, O. (author), van der Veer, E.F. (author)The Southern part of the Flevopolder has shown considerable subsidence since its reclamation inconference paper 2015
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Gunnink, J.L. (author), Siemon, B. (author)Airborne electromagnetic (AEM) measurements provide information regarding the electrical properties of the subsurface for large spatial coverage in a limited time. In mapping and modelling for geological and geohydrological purposes, electrical properties (e.g. resistivity) need to be converted to relevant parameters, like lithology. Helicopter...article 2015
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Gunnink, J.L. (author), Maljers, D. (author), van Gessel, S.F. (author), Menkovic, A. (author), Hummelman, H.J. (author)A 3D geological raster model has been constructed of the onshore of the Netherlands. The model displays geological units for the upper 500 m in 3D in an internally consistent way. The units are based on the lithostratigraphical classification of the Netherlands. This classification is used to interpret a selection of boreholes from the national...article 2013
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van der Meulen, M.J. (author), Doornenbal, J.C. (author), Gunnink, J.L. (author), Stafleu, J. (author), Schokker, J. (author), Vernes, R.W. (author), van Geer, F.C. (author), van Gessel, S.F. (author), van Heteren, S. (author), van Leeuwen, R.J.W. (author), Bakker, M.A.J. (author), Bogaard, P.J.F. (author), Busschers, F.S. (author), Griffioen, J. (author), Gruijters, S.H.L.L. (author), Kiden, P. (author), Schroot, B.M. (author), Simmelink, H.J. (author), van Berkel, W.O. (author), van der Krogt, R.A.A. (author), Westerhoff, W.E. (author), van Daalen, T.M. (author)Over the last ten to twenty years, geological surveys all over the world have been entangled in a process of digitisation. Their paper archives, built over many decades, have largely been replaced by electronic databases. The systematic production of geological map sheets is being replaced by 3D subsurface modelling, the results of which are...article 2013
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Paap, B.F. (author), Dubelaar, C.W. (author), Gunnink, J.L. (author), Post, A.P. (author)Modelling of the shallow subsurface of the Dutch Wadden Sea is merely based on lithological information extracted from a limited amount of core samples. In order to improve the subsurface model and to provide a better basis for engineering purposes, seismic data have recently been acquired, processed and interpreted. This study focuses on the...article 2012
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Faneca S̀anchez, M. (author), Gunnink, J.L. (author), van Baaren, E.S. (author), Oude Essink, G.H.P. (author), Siemon, B. (author), Auken, E. (author), Elderhorst, W. (author), de Louw, P.G.B. (author)The forecast of climate change effects on the groundwater system in coastal areas is of key importance for policy makers. The Dutch water system has been deeply studied because of its complex system of low-lying areas, dunes, land won to the sea and dikes, but nowadays large efforts are still being done to find out the best techniques to...article 2012
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- Gunnink, J.L. (author), Bosch, J.H.A. (author), Siemon, B. (author), Roth, B. (author), Auken, E. (author) article 2012
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de Lange, G. (author), Bakr, M. (author), Gunnink, J.L. (author), Huisman, D.J. (author)Weak soils like unconsolidated clay and peat may deform and compress considerably by loading, for example, by sand bodies for roads and railways. Archaeological sites within such easily compressible soil layers may therefore be heavily affected by different kinds of construction works. The vulnerability of archaeological sites to compression is...article 2012
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Maljers, D. (author), Stafleu, J. (author), Busschers, F. (author), Gunnink, J.L. (author)The Geological Survey of the Netherlands aims at building a 3D geological property model of the upper 30 meters of the Dutch subsurface. This model, called GeoTOP, provides a basis for answering subsurface related questions on, amongst others, sand and gravel resources. Modelling is carried out per province using a core-database containing...conference paper 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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TNO Bouw en Ondergrond (author), Vonhögen, L.M. (author), Doornenbal, P.J. (author), de Lange, G. (author), Fokker, P.A. (author), Gunnink, J.L. (author)The low-lying part of The Netherlands is very vulnerable in terms of surface subsidence due to peat oxidation and peat/clay compaction. To gain knowledge about this kind of subsidence and the factors driving it, a study was performed in which as many surface elevation data were collected as possible and processed to obtain a subsidence map....conference paper 2010