document

Inverse modeling of groundwater flow and groundwater mass transport

Nederlands Instituut voor Toegepaste Geowetenschappen TNO (author), Valstar, J. (author)

conference paper 2000

document

Bateriele aantasting van houten paalfunderingen. Literatuurstudie en inventarisatie van de Nederlandse situatie

Nederlands Instituut voor Toegepaste Geowetenschappen TNO (author), Klaassen, R.K.W.M. (author), den Nijs, P.J.M. (author), van Beusekom, G.W. (author)

Van het Ministerie van VROM is de opdracht ontvangen om een literatuurstudie uit te voeren naar de oorzaken van bacteriële aantasting in Nederlandse houten paalfunderingen en om het reeds uitgevoerde funderingsonderzoek aan Nederlandse houten paalfunderingen waarbij bacteriële aantasting is geconstateerd te inventariseren. Door de alarmerende...

report 2000

document

Knowledge-based sampling strategy for soil stockpiles

Nederlands Instituut voor Toegepaste Geowetenschappen TNO Technisch Physische Dienst TNO - TH (author), Lamé, F. (author), Derksen, G. (author), Honders, T. (author), Gadella, M. (author), Maas, T. (author)

Over the last three years the Centre for Soil Treatment has sampled 2570 soil stockpiles for the assessment of soil quality. For all stockpiles the same sampling strategy was used. 100 increments of approximately 180 grams were taken and collected into two batch samples. Appropriate sample pre-treatment and analyses resulted in two sets of...

conference paper 2000

document

Contrasting neogene denudation histories of different structural regions in the transantarctic mountains rift flank constrained by cosmogenic isotope measurements

van der Wateren, F.M. (author), Dunai, T.J. (author), van Balen, R.T. (author), Klas, W. (author), Verbers, A.L.L.M. (author), Passchier, S. (author), Herpers, U. (author), Nederlands Instituut voor Toegepaste Geowetenschappen TNO (author)

Separate regions within the Transantarctic Mountains, the uplifted flank of the West Antarctic rift system, appear to have distinct Neogene histories of glaciation and valley downcutting. Incision of deep glacial outlet valleys occurred at different times throughout central and northern Victoria Land. This is corroborated by measurements of...

article 1999

document

The leaching of trace elements from municipal solid waste incinerator bottom ash at different stages of weathering

Meima, J.A. (author), Comans, R.N.J. (author), Nederlands Instituut voor Toegepaste Geowetenschappen TNO (author)

For a proper assessment of the environmental impact of the utilisation and disposal of Municipal Solid Waste Incinerator (MSWI) bottom ash it is necessary to understand weathering processes and their effects on (trace) element leaching. The authors have investigated the processes that control the leaching of Cd, Pb, Zn, Cu, and Mo from 3...

article 1999

document

Application of fluid flow systems analysis to reconstruct the post-Carboniferous hydrogeohistory of the onshore and offshore Netherlands

Verweij, J.M. (author), Nederlands Instituut voor Toegepaste Geowetenschappen TNO (author)

The reconstruction of the post-Carboniferous hydrogeohistory of the onshore and offshore Netherlands is part of an ongoing TNO project on fluid flow systems analysis on geological timescales. The scope of the project is to assess the present-day hydrogeological and fluid flow conditions of the sedimentary basins in the onshore and offshore...

article 1999

document

Intrinsic and enhanced biodegradation of benzene in strongly reduced aquifers

van Heiningen, W.N.M. (author), Rijnaarts, H.H.M. (author), Langenhoff, A.A.M. (author), Nederlands Instituut voor Toegepaste Geowetenschappen TNO (author)

Laboratory microcosm studies were performed to examine intrinsic and enhanced benzene bioremediation using five different sediment and groundwater samples from three deeply anaerobic aquifers sited in northern Netherlands. The influence of addition of nitrate, sulfate, limited amounts of oxygen, and combinations of these electron acceptors was...

conference paper 1999

document

Simulation of three-phase displacement mechanisms using a 2D lattice-Boltzmann model

van Kats, F.M. (author), Egberts, P.J.P. (author), Nederlands Instituut voor Toegepaste Geowetenschappen TNO (author)

Using a numerical technique, known as the lattice-Boltzmann method, we study immiscible three-phase flow at the pore scale. An important phenomenon at this scale is the spreading of oil onto the gas-water interface. In this paper, we recognize from first principles how injected gas remobilizes initially trapped oil blobs. The two main flow...

article 1999

document

Modelling of the effect of a sea-level rise and land subsidence on the evolution of the groundwater density in the subsoil of the northern part of the Netherlands

van der Meij, J.L. (author), Minnema, B. (author), Nederlands Instituut voor Toegepaste Geowetenschappen TNO (author)

The Province of Friesland is conducting a study on possible future changes in the surface water and groundwater systems of Friesland. The aim of the study is to assess what changes might be caused by land subsidence and a rise in sea level - focusing in particular on the salinization of the surface water - by modelling the flow of groundwater in...

article 1999

document

Ground penetrating radar images of selected fluvial deposits in the Netherlands

van den Berghe, J. (author), van Overmeeren, R.A. (author), Nederlands Instituut voor Toegepaste Geowetenschappen TNO (author)

Ground penetrating radar (GPR) surveys have been carried out in order to characterise reflection patterns and to assess the method's potential for imaging palaeofluvial sediments in the Mass-Rhine former confluence area in the southern Netherlands. The results show that the deposits of meandering, braided and transitional river types produce...

article 1999

document

The grey areas in soil pollution risk mapping: The distinction between cases of soil pollution and increased background levels

van der Gaast, N. (author), Leenaers, H. (author), Zegwaard, J. (author), Nederlands Instituut voor Toegepaste Geowetenschappen TNO (author)

The progress of soil clean up in the Netherlands is severely hindered by the lack of common agreement on how to describe the grey areas of increased background levels of pollutants. In this study practical methods are proposed in which background levels are described as distribution functions within map units of comparable homogeneity. To...

article 1998

document

Radar facies of unconsolidated sediments in The Netherlands: A radar stratigraphy interpretation method for hydrogeology

van Overmeeren, R.A. (author), Nederlands Instituut voor Toegepaste Geowetenschappen TNO (author)

Since 1990, The Netherlands Institute of Applied Geoscience TNO has been carrying out ground penetrating radar (GPR) measurements to assess the potential for imaging and characterising different hydrogeological targets in more than 30 pilot areas in The Netherlands. The experience gained by processing this large amount of radar data has enabled...

article 1998

document

Samenvattinen symposium Van gegevens naar informatie en sturing: 50 jaar archief grondwaterstanden. 5 november 1998 Delft

Nederlands Instituut voor Toegepaste Geowetenschappen TNO (author)

conference paper 1998

document

Suitability of the first-order mass transfer concept for describing cyclic diffusive mass transfer in stagnant zones

Griffioen, J. (author), Nederlands Instituut voor Toegepaste Geowetenschappen TNO (author)

The concept of first-order mass transfer between mobile and immobile regions, which mathematically simplifies the concept of Fickian diffusion in stagnant areas, has often been used to describe physical nonequilibrium transport of solutes into natural porous media. This study compares the two concepts, using analytical expressions describing...

article 1998

document

Report on the geo-environmental inquiry project, central and eastern Europe

Mattig, U. (author), de Mulder, E.F.J. (author), Nederlands Instituut voor Toegepaste Geowetenschappen TNO (author)

The Commission on Geological Sciences for Environmental Planning (COGEOENVIRONMENT) of IUGS and UNESCO have initiated a joint project to develop a worldwide data base on earthscience-related environmental problems and to assess which geoscientific information is available locally for prevention, prediction or mitigation of such problems. As a...

article 1998

document

Jaarverslag Nederlands instituut voor toegepaste geowetenschappen TNO [1997-2003]

Nederlands instituut voor toegepaste geowetenschappen TNO (author)

report 1998

document

Resistive heating enhanced soil vapor extraction of chlorinated solvents from trichloroethylene contaminated silty, low permeable soil

Nederlands Instituut voor Toegepaste Geowetenschappen TNO (author), van Zutphen, M. (author), Heron, G. (author), Enfield, C.G. (author), Christensen, T.H. (author)

A 2D-laboratory box experiment (12 x 56 x 116 cm) was conducted to simulate the enhancement of soil vapor extraction by the application of low frequency electrical heating Uoule heating) for the remediation of a low permeable, silty soil contaminated with trichloroethylene. Joule heating enlarged the flux of extracted TCE with a factor 19 (when...

conference paper 1998

document

Intrinsic bioremediation in the case of a diesel oil contamination at a railway yard: investigation and possible implementation

Nederlands Instituut voor Toegepaste Geowetenschappen TNO (author), Staps, J.J.M. (author), Griffioen, J. (author), Kok, A.P. (author)

conference paper 1998

document

On diffusive mass-transfer limitations in relation to remediation of polluted groundwater systems

Nederlands Instituut voor Toegepaste Geowetenschappen TNO (author), Griffioen, J. (author), Hetterschijt, R.A.A. (author)

Limited diffusive mass transfer is one cause for stagnant groundwater remediations. We characterise the diffusive mass transfer process as a three stage cyclic process of mass transfer into and out of stagnant or immobile zones. The first stage is the contamination stage, where net inward diffusive mass transfer happens and the last stage is the...

conference paper 1998

document

Biostratigraphy of Cretaceous/Tertiary boundery strata in Curfs quarry, The Netherlands

Nederlands Instituut voor Toegepaste Geowetenschappen TNO (author), Herngreen, G.F.W. (author)

book 1998