Searched for: department%3Ahydraulic
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Wentholt, L.R. (author)
Description of the Dutch (sandy) coastline, data on high water line, low water line and dunefoot, description of groynes along the coast, effects of harbour moles and breakwaters on the sandy coastline. Detailed analysis on the efficiency of groins along the coast of Holland as well as the Wadden islands
doctoral thesis 1912
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De Glee, G.J. (author)
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.
doctoral thesis 1930
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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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Mazure, J.P. (author)
Ter oplossing van het, aan de "Staatscommissie inzake hooge waterstanden als gevolg van de afsluiting der Zuiderzee" voorgelegde probleem, heeft de voorzitter dezer commissie, de groote natuurkundige H. A. Lorentz, als eerste een betrouwbare en practisch uitvoerbare methode gegeven tot het berekenen. van getijverschijnselen in zeeannen. Deze...
doctoral thesis 1937
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Van der Meer, Z.Y. (author)
Beschrijving van de opkomst van de waterschappen, hoogheemraadscahppen, heemraadschappen en polderdistricten in de Nederlanden in de 16e en 17e eeuw. Beschrijving van de situatie in de afzonderlijke provincien. De regeling van de financien van de waterstaat. Aandacht voor interprovinciale belangen
doctoral thesis 1939
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Lindenbergh, P.C. (author)
Investigation on the use of groundwater storage for drinking water in the dune area near Leiden, Netherlands. Optimization of the ratio of infiltration and extraction of drinking water
doctoral thesis 1941
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Tchen, C.M. (author)
A theoretical treatment of diffusion as function of turbulence, by working out the dispersion of small particles in turbulent fluid. The method of Kolmogoroff is used to decribe the movement in a statistical ways
doctoral thesis 1947
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Riad, K. (author)
It has long been observed that at most canal bifurcations the water diverted to the branch does not carry sediment in direct proportion to the rate of flow. Usually, the major part of sediment reaching a bifurcation is diverted into the small branches. This phenomenon has always bothered engineers responsible for the maintenance of irrigation...
doctoral thesis 1961
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Abraham, G. (author)
Submarine outfall disposal of domestic and industrial sewage is a method of disposal of steadily growing importance. The flow from an ocean outfall is essentially that of a submerged horizontal or vertical jet. Thus a study of the hydrodynamics of such jets is needed to evaluate the dilution of the sewage flow. A study of this kind is presented...
doctoral thesis 1963
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Wells, D.R. (author)
In this dissertation some characteristics of the horizontal water velocity for single, multiple, and random gravity wave trains are studied. This work consists of two parts, an analogue study and hydraulic measurements. An important aspect in this work is to suggest the horizontal water velocity asymmetry as a criterion for sand movement by...
doctoral thesis 1964
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De Vries, M. (author)
The quantitative determination of bed-material-transport by means of tracers has been considered. For a stationary-stochastical transport-condition the dispersion of tracers has been described by a diffusion-equation of the gradienttype. The parameters of the dispersion-model are derived from the measured concentrations by a least-squares...
doctoral thesis 1966
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Vreugdenhil, C.B. (author)
A great deal of literature has been devoted to gravity currents in estuaries. However, more or less detailed theoretical models of these phenomena are scarce. This is partly due to the fact that the equations have been difficult to solve if they describe the situation with some generality. This difficulty is surmounted by the use of digital...
doctoral thesis 1970
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Kalkwijk, J.P.T. (author)
This thesis treats the fluid and ship motion in a navigation lock and their mutual interaction as caused by surges, which occur in the chamber during filling or emptying. The other phenomena, which possibly play a role during these processes are ignored. The considerations of this treatise hold good for one ship in the chamber of the navigation...
doctoral thesis 1973
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Kranenburg, C. (author)
The aim of the present study is to set up a one-dimensional mathematical model, which describes the transient flow in pipelines, taking into account the influence of cavitation and free gas. The flow will be conceived of as a three-phase flow of the liquid, its vapour and non-condensible gas. The wave attenuation following transient cavitation...
doctoral thesis 1974
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Van de Sande, E. (author)
Gas entrainment caused by the impact of liquid jets upon liquid pool surfaces is a subject which has received too little attention. This well-known phenomenon,which occurs In nature and in numerous industrial operations, has only recently received interest from scientific workers. The influence on product quality and applications in waste water...
doctoral thesis 1974
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Fernandez Luque, R. (author)
In this thesis first a general derivation is given of the 'macro'-equations of mass- and linear-momentum balance that govern the mo'mentum transfer from a Newtonian fluid to rigid particles in a fluid-solid mixture. In particular, attention is paid to a) the attenuation of viscous-momentum transfer from the boundary to the interior of a granular...
doctoral thesis 1974
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Kolkman, P.A. (author)
The objective of this study is to develop design criteria for the dynamic behaviour of gates and valves. To this end, a resume of existing theories is given as well as an extended analysis of the added water mass, hydrodynamic rigidity and damping (also negative damping or self-excitation) and excitation by turbulent flow. New computation...
doctoral thesis 1976
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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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Booij, N. (author)
A mathematical model for the combined refraction-diffraction of linear periodic gravity waves on water is developed, in which the influence of inhomogeneities of depth and current is taken into account. The model is used to compute partial reflection of waves a gully or an undersea slope, with influence of a current. The model is also applied to...
doctoral thesis 1981
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Holthuijsen, L.H. (author)
The objective of the present study is to determine characteristics of the directional energy distribution of wind generated waves on the basis of observations with a relatively high resolution. Approximately 75 observations of the above distribution are studied. They are selected from five spectra which are determined from stereophotographic...
doctoral thesis 1981
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