Searched for: faculty%3A%22Civil%255C+Engineering%255C+and%255C+Geosciences%22
(5,881 - 5,900 of 11,409)
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Crosato, A. (author), Desta, F.B. (author)Alternate bars in straight alluvial channels are migrating or steady. The currently accepted view is that they are steady only if the width-to-depth ratio is at the value of resonance or if the bars are forced by a steady local perturbation. Experimental observations, however, seem to indicate that steady bars are also present in cases of...conference paper 2009
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Kroon, J. (author)In numerical modelling of water movement wetting and drying is a well known problem. The governing equations are not valid in the dry part of the computational domain which may result in problems with mass conservation, negative water depths and artificially enlarged gradients. A method is proposed that allows for the surface elevation to become...master thesis 2009
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Bakker, M. (author)A new analytic-element solution is presented for a well with a sinusoidal discharge pumping near cylindrical inhomogeneities. Both the transmissivity and the storage coefficient may be different inside each cylinder. The solution consists of separate series solutions inside and outside each cylinder; asymptotic expansions are presented for cases...journal article 2009
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Allsop, N.W.H. (author), Cork, R.S. (author), Verhagen, H.J. (author)This paper introduces a co-operative project between HR Wallingford UK (HRW) and Delft University of Technology, Netherlands, (TUD) to develop, populate, and then to apply a database on all major breakwaters around the world. It builds on, and revives, similar initiatives that originate in the late 1970s. The paper describes the objectives in...conference paper 2009
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Schakel, W.J. (author)EVAQ is a traffic model for ex-ante evaluations of evacuations plans. The model is still in development and it is uncertain whether EVAQ will accurately model network performance degeneration. At the same time it can be said that accurate network performance degeneration is very important for evacuations. The research of this thesis identifies...master thesis 2009
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Mul, M.L. (author), Savenije, H.H.G. (author), Uhlenbrook, S. (author)OA fund TU Delft This paper describes an extreme flood event that occurred in the South Pare Mountains in northern Tanzania. A high spatial and temporal resolution data set has been gathered in a previously ungauged catchment. This data was analysed using a multi-method approach, to gather information about the processes that generated the flood...journal article 2009
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De Groen, F. (author)The goal of this MSc-thesis is to investigate the possibility of calibrating the microscopic traffic simulation model PARAMICS with a phase-based algorithm. The underlying principle is that once the PARAMICS-model is calibrated and validated, its trajectories can be used for the calculation of microscopic traffic emission predictions. This is...master thesis 2009
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Verhagen, H.J. (author)A new construction method of Polyurethane (PUR)-bonded revetments has been tested successfully on various locations in Germany, in the Netherlands, in France, and in the UK. See also the presentation of Bijlsma on this ICE breakwater conference. This year a series of large scale test in the GWK-facility in Hannover have been executed. This...conference paper 2009
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Van der Burg, D. (author), Verdel, A. (author), Wapenaar, C.P.A. (author)Trace inversion for reservoir parameters is affected by angle averaging of seismic data and wavelet distortion on the migration image. In an alternative approach to stochastic trace inversion, the data are inverted prestack before migration using 3D dynamic ray tracing. This choice makes it possible to interweave trace inversion with Kirchhoff...journal article 2009
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Verhagen, H.J. (author), Mertens, M. (author)In the Rock Manual [2007] two sets of equations for the determination of rock stability in breakwaters armour layers are presented. One set is the original formula presented by Van der Meer [1988], valid for deep water conditions. This set uses the parameters Hs and Tm. The other set is an adaptation of these formulae, using the parameters H2%...conference paper 2009
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Zhou, J. (author), Qian, S. (author), Sierra Beltran, M.G. (author), Ye, G. (author), Van Breugel, K. (author), Li, V.C. (author)Nowadays limestone powder and blast furnace slag (BFS) are widely used in concrete as blended materials in cement. The replacement of Portland cement by limestone powder and BFS can lower the cost and enhance the greenness of concrete, since the production of these two materials needs less energy and causes less CO2 emission than Portland cement...journal article 2009
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Benit, M.P. (author)As waves enter the surf-zone, the wave spectra undergo drastic transformations because of depth-induced breaking and triad interactions. Any arbitrary spectrum will converge towards a smooth, universal shape in which initially higher harmonic peaks emerge that disappear as wave propagate further into the surf-zone. The current formulation of...master thesis 2009
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Van den Berg, M. (author)According to the Dutch building regulations, called Building Decree, 135 persons per minute should be able to safely escape via a doorway with a width of 1 meter, which is the same as 2.25 persons per second per meter. Since this value has been based on experiments conducted with healthy students, doubts have been raised on the validity of this...master thesis 2009
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Verhagen, H.J. (author)A new construction method of Polyurethane (PUR)-bonded revetments (Elastocoast) has been tested successfully on various locations in Germany, in the Netherlands, in France, and in the UK. See also the presentation of Bijlsma on this conference. This year a series of large scale test in the GWK-facility in Hannover have been executed. This...conference paper 2009
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Sluijsmans, R.W. (author)The elastocoast system can be used as an armour layer on revetments. The bonding system exists of a mix of crushed stones and 2-component polyurethane. This bonding system creates bonding forces between the stones and an open (porous) structure can be obtained. Elastocoast is developed by Elastogran GmbH, a BASF subsidiary. The response of an...master thesis 2009
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Otto, K. (author)De traditionele manier van aanbesteding waarbij gebruik wordt gemaakt van het gunningscriterium ‘laagste prijs’ zorgt voor een aantal nadelen. Zo leveren aanbieders op deze manier van aanbesteden vaak een oplossing die weliswaar scherp geprijsd is maar hierdoor ook een oplossing die het met de kwaliteit niet zo nauw neemt. Aanbieders die echter...master thesis 2009
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Corzo, G.A. (author), Solomatine, D.P. (author), Hidayat, M.S. (author), De Wit, M. (author), Werner, M. (author), Uhlenbrook, S. (author), Price, R.K. (author)One of the challenges in river flow simulation modelling is increasing the accuracy of forecasts. This paper explores the complementary use of data-driven models, e.g. artificial neural networks (ANN) to improve the flow simulation accuracy of a semi-distributed process-based model. The IHMS-HBV model of the Meuse river basin is used in this...journal article 2009
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Guerdal, Z. (author), Vasiliev, V. (author)The invention relates to a structural panel comprising a core of fibre material and outer layers on opposite sides of the core, wherein the core of fibre material is received in preshaped grooves provided in one outer layer's surface, the remaining area in said grooves being completely filled with resin material so as to avoid any air remaining...patent 2009
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Bakker, M. (author)A new accurate numerical solution is presented for aquifer storage and recovery (ASR) systems in coastal aquifers; flow is approximated as radial Dupuit interface flow. The radial velocities of points on the interface are a function of time, the vertical coordinate, and the dimensionless parameter D (the discharge of the well divided by the...journal article 2009
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Eelkema, M. (author), Wang, Z.B. (author), Stive, M.J.F. (author)The Eastern Scheldt tidal basin has changed drastically in the past five centuries under the influence of both human interventions as well as extreme events. In 1530 A.D. a storm-surge inundated large parts in the landward end of the basin, and in the following four centuries local inhabitants reclaimed about as much land as was inundated in...conference paper 2009
Searched for: faculty%3A%22Civil%255C+Engineering%255C+and%255C+Geosciences%22
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