Searched for: subject%3A%22Groundwater%255C%2Bflow%22
(1 - 14 of 14)
document
Gies, C. (author), Struijk, M. (author), Bekesi, E. (author), Veldkamp, H. (author), van Wees, J.D. (author)
We present a new method to incorporate paleo-surface temperature effects in steady state 3D conductive temperature models. The workflow approximates the transient effects and incorporates these into steady state models, using appropriate source and sink terms for radiogenic heat production. This allows for rapid models, which can be easily used...
article 2021
document
Kuijpers, C.J. (author), Huinink, H.P. (author), Tomozeiu, N. (author), Erich, S.J.F. (author), Adan, O.C.G. (author)
Due to the increased use of nanoparticles in everyday applications, there is a need for theoretical descriptions of particle transport and attachment in porous media. It should be possible to develop a one dimensional model to describe nanoparticle retention during capillary transport of liquid mixtures in porous media. Water-glycerol...
article 2018
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Sangers, M. (author), Trujillo, R. (author), Voskov, D. (author), Leeuwenburgh, O. (author)
We investigate the potential for improved recovery of subsurface energy resources (hydrocarbons or heat) through in-depth diversion technology. A number of pilot studies in the North Sea have demonstrated in recent years that sodium silicate can be used to block preferential flow paths and divert water to previously unswept areas of a reservoir....
conference paper 2018
document
van den Brink, C. (author), Zaadnoordijk, W.J. (author), van der Grift, B. (author), de Ruiter, P.C. (author), Griffioen, J. (author), TNO Bouw en Ondergrond (author)
A negotiation support system (NSS) was developed to solve groundwater conflicts that arose during land-use management. It was set up in cooperation with the stakeholders involved to provide information on the impact of land use, e.g., agriculture, nature (forested areas), recreation, and urban areas, on the quality of both infiltrating and...
article 2008
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van der Grift, B. (author), Griffioen, J. (author), TNO Bouw en Ondergrond (author)
Historic emissions from ore smelters typically cause regional soil contamination. We developed a modelling approach to assess the impact of such contamination on groundwater and surface water load, coupling unsaturated zone leaching modelling with 3D groundwater transport modelling. Both historic and predictive modelling were performed, using a...
article 2008
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Visser, A. (author), Broers, H.P. (author), Bierkens, M.F.P. (author), TNO Bouw en Ondergrond (author)
The production of gases in groundwater under contaminated locations by geochemical and biological processes is not uncommon. Degassing of these gases from groundwater and repartitioning of noble gases between water and gas phase distorts groundwater dating by 3H/3He. We observed noble gas concentrations below atmospheric equilibrium in 20 out of...
article 2007
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Berendrecht, W.L. (author), Heemink, A.W. (author), van Geer, F.C. (author), Gehrels, J.C. (author), TNO Bouw en Ondergrond (author)
A non-linear state space model is developed for describing groundwater fluctuations. Non-linearity is introduced by modeling the (unobserved) degree of water saturation of the root zone. The non-linear relations are based on physical concepts describing the dependence of both the actual evapotranspiration and the percolation rate on the degree...
article 2006
document
Vermeulen, P.T.M. (author), Heemink, A.W. (author), Valstar, J.R. (author)
Numerical groundwater flow models often have a very high number of model cells (greater than a million). Such models are computationally very demanding, which is disadvantageous for inverse modeling. This paper describes a low-dimensional formulation for groundwater flow that reduces the computational burden necessary for inverse modeling. The...
article 2005
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Valstar, J.R. (author), McLaughlin, D.B. (author), te Stroet, C.B.M. (author), van Geer, F.C. (author)
Groundwater inverse problems are concerned with the estimation of uncertain model parameters, such as hydraulic conductivity, from field or laboratory measurements. In practice, model and measurement errors compromise the ability of inverse procedures to provide accurate results. It is important to account for such errors in order to determine...
article 2004
document
Vermeulen, P.T.M. (author), Heemink, A.W. (author), te Stroet, C.B.M. (author)
Numerical models are often used for simulating groundwater flow. Written in state-space form, the dimension of these models is of the order of the number of grid cells used and can be very high (more than a million). As a result, these models are computationally very demanding, especially if many different scenarios have to be simulated. In this...
article 2004
document
Orlic, B. (author)
Coupled flow-stress numerical models have been increasingly used in geomechanical studies for a better understanding and more accurate prediction of subsurface behaviour due to the extraction of hydrocarbons and geological storage of energy residues. Two application studies are described demonstrating various ways of integration of the flow...
article 2003
document
van Weert, F.H.A. (author), van Gijssel, K. (author), Leijnse, A. (author), Boulton, G.S. (author), Netherlands Geological Survey (author)
A large-scale hydrological model study is carried out to investigate the geohydrological responses to glacial climate conditions in Northwest Europe. The vertically integrated groundwater model is based on a supraregional hydrogeological model of the Cenozoic and Mesozoic subsurface in Northwest Europe. Three different layers are distinguished...
article 1997
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Stolwijk, N.H.M. (author), Zijl, W. (author), Boekelman, R. (author), Nederlands Instituut voor Toegepaste Geowetenschappen TNO (author)
In this paper, we present a method that may lead to a better quantitative insight into the relation between the size (horizontal dimensions) of a natural groundwater flow modelling area and the schematization required for a numerical model. The method is based on a decomposition of the spatial variability of the groundwater table into a Fourier...
article 1996
document
Nieuwenhuizen, R. (author), Zijl, W. (author), van Veldhuizen, M. (author), Nederlands Instituut voor Toegepaste Geowetenschappen TNO (author)
This paper deals with the analytical description of single-phase flow caused by abstraction wells and governed by Darcy's law. Since we are mainly interested in the velocity field upon which an analysis of transport phenomena can be based, we may assume that the flow is quasi steady. A well may be composed of a number of point sinks, therefore...
article 1995
Searched for: subject%3A%22Groundwater%255C%2Bflow%22
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