Comparison of groundwater recharge estimation methods for the semi-arid Nyamandhlovu area, Zimbabwe

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...

Limitations to upscaling of groundwater flow models dominated by surface water interaction

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...

Impact of sea level rise on groundwater flow regimes: A sensitivity analysis for the Netherlands

Comparison of Stationary and Oscillatory Flow through Porous Media

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,...

Waterverlies van de rivier de Hadejia

De rivier de Hadejia in Nigeria stroomt over de goed waterdoorlatende bodem van het Tsjaadbekken. De grondwaterstand in het Tsjaadbekken ligt op 5 meter of dieper onder de rivierbodem. Er stroomt dus water af vanuit de rivier door de bodem naar het grondwater. Het is belangrijk te weten wat de grootte van het waterverlies door de bodem is ten...

Gebruikershandleiding GROFLOD: Tweedimensionale grondwaterstroming in een dijklichaam met een gesloten bekleding

Model voor het simuleren van grondwaterstroming in dijklichamen onder invloed van golfbelastingen. Uitgevoerd onder auspicien van werkgroep 4 van de TAW.

Berekening basisdrainage in DEMGEN: Verslag onderzoek naar aanpak en problemen

Nonlinearity in groundwater flow

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...

Stormvloedkering Oosterschelde: Belasting op putten ten gevolge van grondwaterstroming

De invloed van de getijbeweging van zeeën en getijrivieren op de stijghoogte van grondwater

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.

Over grondwaterstroomingen bij wateronttrekking door middel van putten

Calculation method for groundwaterflow in case of subraction of groundwater via vertical pumping wells for drinking water purposes. Both permanent and instationary pumping are considered.

De capillaire werkingen in den bodem

Beschouwing over de capillaiewerking van grondwater en waar dit een functie van is. Beschrijving funiculair en pendulair water. Uitwisseling van water en lucht in de bodem