Searched for: subject%3A%22groundwater%255C+flow%22
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Nyenje, Philip M. (author), Ocoromac, Denis (author), Tumwesige, Stephen (author), Ascott, Matt J. (author), Sorensen, James P.R. (author), Tindimugaya, Callist (author), Kulabako, Robinah N. (author), Lapworth, Dan J. (author), Foppen, J.W.A. (author)
Weathered basement aquifers are vital sources of drinking water in Africa. In order to better understand their role in the urban water balance, in a weathered basement aquifer in Kampala, Uganda, this study installed a transect of monitoring piezometers, carried out spring flow and high-frequency groundwater level monitoring, slug tests and...
journal article 2022
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Mohamed, Ahmed (author), Ahmed, Ezzat (author), Alshehri, Fahad (author), Abdelrady, Ahmed (author)
The Nubian Sandstone Aquifer System (NSAS) is made up of three major sub-basins: Kufra, Dakhla, and the N. Sudan Platform. It is one of the world’s largest groundwater systems. The aquifer’s hydrologic setting, connectivity of its sub-basins, and groundwater flow across these sub-basins are currently unclear. To address these issues, we used...
journal article 2022
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Li, J. (author), Zhou, Yangxiao (author), Wang, Wenke (author), Liu, S. (author), Li, Ying (author), Wu, Ping (author)
The sustainable development of groundwater resources in arid and semi-arid regions is a challenging task hindered by climate change and human activities. The rational utilization and management of groundwater resources is, therefore, dependent on an understanding of the influences of human and climatic factors on the spatial distribution of...
journal article 2022
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Bouaziz, L.J.E. (author)
Contemplating the Meuse or any other river of the world, one may wonder about the journey of rain in becoming river. This fascinates hydrologists, as they develop theories to understand movement, storage and release of water through the landscape across climates. These theories are translated to hydrological models, which describe the complex...
doctoral thesis 2021
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Verkaik, J. (author), van Engelen, J. (author), Huizer, S. (author), Bierkens, Marc F.P. (author), Lin, H.X. (author), Oude Essink, G.H.P. (author)
Fresh groundwater reserves, being of vital importance for more than a billion of people living in the coastal zone, are being threatened by saltwater intrusion due to anthropogenic activities and climate change. High resolution three-dimensional (3D), variable-density (VD), groundwater flow and salt transport (FT) numerical models are...
journal article 2021
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Bloemendal, Martin (author), Olsthoorn, T.N. (author)
Aquifer thermal energy storage (ATES) is a technology with worldwide potential to provide sustainable space heating and cooling using groundwater stored at different temperatures. In areas with high ambient groundwater flow velocity (>25 m/y) thermal energy losses by displacement of groundwater may be prevented by application of multiple...
journal article 2018
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García Martínez, M.F. (author), Marchi, M. (author), Tonni, L. (author), Gottardi, G. (author), Bezuijen, A. (author), Rosso, A. (author)
The reliability of river embankments is essential for flood risk management. The Po River, which flows through the North of Italy, is safeguarded over half of its length by major river embankments. Performance assessment of such water-retaining structures has become a major concern following some significant flood events in the past. Among the...
conference paper 2017
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van Beek, V.M. (author), Hoffmans, G.J.C.M. (author)
The prediction of backward erosion piping is important for safety assessment of dikes in the Netherlands, where subsurface conditions are prone to this erosion mechanism. In the current assessment methodology, the adapted Sellmeijer rule is in use. In combination with the national safety philosophy and uncertainty in input parameters, this model...
conference paper 2017
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Vandenboer, K. (author), van Beek, V.M. (author), Bezuijen, A. (author)
Backward erosion piping is an important failure mechanism for water-retaining structures, a phenomenon that results in the formation of shallow pipes at the interface of a sandy or silty foundation and a cohesive cover layer. Although the pipe depth reveals a lot of information on the backward erosion process, it has never been measured...
conference paper 2017
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Van Esch, J. (author)
This report assesses the consequences of droughts and periods of heavy precipitation for embankments. The proposed assessment procedure couples an agro-meteorological model based on the Penmann-Monteith expression to a groundwater flow model based on Dupuit's approximation. This approach is justified by the fact that the flow process through the...
report 2012
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Elfeki, A.M.M. (author), Uffink, G.J.M. (author), Lebreton, S. (author)
The combined influence of temporal fluctuations and spatial heterogeneity on non-reactive solute transport mechanisms in porous media can be understood by performing simulations of steady and unsteady flow and transport in heterogeneous media. The study focuses on issues such as the degree of heterogeneity, correlation length, separation of the...
journal article 2011
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Veling, E.J.M. (author)
In this article, we describe horizontal groundwater flow due to a uniform flow at infinity around a cylindrical or elliptical inhomogeneity, where the permeability inside the inhomogeneity is anisotropic and different from the isotropic domain outside the inhomogeneity. The orientation of the uniform flow with respect to the orientation of the...
journal article 2011
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Sibanda, T. (author), Nonner, J.C. (author), Uhlenbrook, S. (author)
The Nyamandhlovu aquifer is the main water resource in the semi-arid Umguza district in Matebeleland North Province in Zimbabwe. The rapid increase in water demand in the city of Bulawayo has prompted the need to quantify the available groundwater resources for sustainable utilization. Groundwater recharge estimation methods and results were...
journal article 2009
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Vermeulen, P.T.M. (author), Te Stroet, C.B.M. (author), Heemink, A.W. (author)
Different upscaling methods for groundwater flow models are investigated. A suite of different upscaling methods is applied to several synthetic cases with structured and unstructured porous media. Although each of the methods applies best to one of the synthetic cases, no performance differences are formed if the methods were applied to a real...
journal article 2006
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Oude Essink, G.H.P. (author)
doctoral thesis 1996
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Smith, G.M. (author)
Rapport is incomplete. Only Chapter 2: Porous Media Flow is included in the PDF. This chapter begins with a general overview of the concepts of porous flow followed by a brief review of Darcy's law, including a description of the parameters comprising this law, its upper limit of vallidity and the reasons for its failure after this limit. Next,...
report 1991
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Wesseling, J.W. (author)
report 1980
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Barends, F.B.J. (author)
Since 1856 when Darcy laid the basis for the calculation of the flow of water through sands, researchers have been interested in groundwater flow. Groundwater is essential for agriculture and water supply, but it also plays an important role when soil is used as a construction element, such as for dykes, roads and foundations. The mechanical...
doctoral thesis 1980
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Vis, F.C. (author)
report 1978
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Steggewentz, J.H. (author)
Method to calculate variations in groundwater level due to the tidal variation at sea and in tidal rivers. Research on groundwater flow and water pressure in ground water due to harmonic variations.
doctoral thesis 1933
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