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- Hartsuiker, G. (author) report 1984
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- Hartsuiker, G. (author) report 1984
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Olthof, J. (author), Verhagen, H.J. (author)As a continuation of the initial study on the morphology of the Douro mouth, performed by Hydronamic in 1982, the Administracao dos Portos do Douro e Leixoes commisioned Hydronamic bv to construct a mathematical hydro-morphological model of the Douro mouth. This second part of the morphological study of the Douro mouth is divided into three...report 1984
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Termes, A.P.P. (author)In order to predict waterlevel changes in rivers due to floodwaves and local bedshapes for navigation, the local behaviour of the riverbed should be known. In many cases the bed of a river ~onsists of dunes, which propagate downstraam due to the sediment transport along the dunes. In this report mainly the watermovement but also the sediment...master thesis 1984
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Ribberink, J.S. (author), Van der Sande, J.T.M. (author)The problem of aggradation in a river due to overloading is tackled with a mathematical model consisting of a set of one-dimensional (in space) basic equations in which the water motion is assumed to be quasi-steady and the sediment transport is determined by local conditions. Analytical solutions are presented of a linearized simple-wave model,...report 1984
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Nakato, T. (author), Kennedy, J.F. (author), Vadnal, J.L. (author)The principal features of the numerical model developed herein for calculation of flow and sediment-transport distributions in alluvial-river bends may be summarized as follows: i. The secondary-flow strength and the bed topography are uncoupled from the calculation of distributions of lateral shift velocity and streamwise velocity. This is...report 1983
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Verhagen, H.J. (author)The river Douro debouches into the Atlantic Ocean near Oporto (Portugal) with a funnel-shaped mouth, partly closed from the ocean with a sand spit. Both the wave-induced longshore sediment transport as the sediment yield of the river are limited by the available quantity of sediment (non-alluvial conditions). The results of some sediment...report 1983
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Van Staverden, J.H. (author)Detailed analysis of river groynes, extensive literature overview, additonal study on fiction and friction coefficients of several material interfaces (especially between rock and geotextile). Aanlysis of erosion downstream of a groyne with the method of Garde. Field tests.master thesis 1983
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Verhagen, H.J. (author)As a continuation of the initial study on the morphology of the Douro mouth performed by Hydronamic in 1982, the Administracao dos Portos de Douro e Leixoes commissioned by Hydronamic bv to construct a mathematical hydro-morphological model of the Douro mouth. Within the framework of the study also a second measuring campaign was commissioned,...report 1983
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Van Duivendijk, J. (author)Overview report of the final design of the Feni closure dam in Bangladeshreport 1983
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Bolton, P. (author)The terms 'wash load', 'suspended bed material load' and 'bed load' are not clearly defined but, if applied with care, provide a useful basis for sub-dividing the total discharge of sediment in a river for the purpose of measurement. The accuracy with which each of the three types of sediment transport must be measured will depend on their...report 1983
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De Vriend, H.J. (author), Geldof, H.J. (author)Results of a mathematical model for the depth-averaged main flow velocity in shallow river bends are compared with measurements in two consecutive sharply-curved short bends in the river Dommel, The Netherlands. The computed main velocity distribution agrees rather well with the measured one in the larger part of each bend. Near the bend exits,...report 1983
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Olesen, K.W. (author)The paper presents a linear perturbation analysis of a horizontal two-dimensional mathematical model for the flow and bed topography in straight alluvial rivers with dominant bed-load. A sediment transport model including effects of transverse bed slope, secondary (helical) flow and secondary flow inertia is employed. The stability and the...report 1983
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Verhagen, H.J. (author)As a continuation of the initial study on the morphology of the Douro mouth, performed by Hydronamic in 1982, the Administracao dos Portos de Douro e Leixoes commisioned Hydronamic bv to construct a mathematical hydro-morphological model of the Douro mouth. Within the framework of the study an analysis of old charts, available in the archivas of...report 1983
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Loman, G.J.A. (author), De Jong, J.J.A. (author), Moir, J.R. (author), Burgers, A. (author), Verhagen, H.J. (author)Man-made islands in the Mackenzie river (Canada) for oil exploitation may obstruct the free flow of ice during spring break up. These ice dams may cause considerable rise of the water level in the rivers, resulting in floods. A numerical model is presented to simulate ice dam formation an river floods.conference paper 1983
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Verhagen, H.J. (author)The Administracao dos Portos do Douro e Leixoes is confronted with the fact that future expansion of the port area of Leixoes is limited by the surrounding hills and urbanization. One of the alternatives for future expansion might be the creation of port facilities in the Douro estuary, where a relatively large, flat area is available. However,...report 1982
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- Luteijn, J.J. (author), Pagee, J.A. van. (author) report 1982
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- Klaassen, G.J. (author), Buysrogge, R.H. (author), Zanten, B.H.J. van (author) report 1981
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- Klomp, R. (author), Pagee, J.A. van (author), Postma, L. (author) report 1981
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- Klomp, R. (author), Pagee, J.A. van (author), Postma, L. (author) report 1981