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Rijsberman, F.R. (author)In river engineering practice it is often required to set up a mathematical model for (part of) a river. A standard computer programme for one-dimensional unsteady flow is of ten available. The input data for the model are obtained through measurements in the prototype. The aim of this study is to provide information on this subject which could...master thesis 1981
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- Postma, L. (author) report 1981
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- Postma, L. (author) report 1981
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- Postma, L. (author) report 1981
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De Vriend, H.J. (author)Making use of a mathematical model solving the complete NavierStokes equations for steady flow in coiled rectangular pipes, fully-developed laminar flow in shallow curved channels is analysed physically and mathematically. Transverse convection of momentum by the secondary flow is shown to cause important deformations of the main velocity...doctoral thesis 1981
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Olesen, K.W. (author)l model whithout this restriction this has been done by taking more grain fractions into consideration. (Model for non - uniform or graded sediment). This extension of the mathematical model for uniform sediment is described in chapter 1, where the basic equations of the model for uniform as well as for non - uniform sediment are derived. The...master thesis 1981
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Papetti, A. (author)Set of design manuals for the use of gabions and mattresses in river and channel training works. The four volumes focus on: - Flexible structures in river and stream training works (section 1, weirs for river training and water supply); - Flexible linings in Reno mattresses and gabions for canals and canalized water courses; - Flexible gabion...report 1981
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White, W.R. (author), Paris, E. (author), Bettess, R. (author)Rational regime relationships for the width, depth and slope of a river in equilibrium are developed using the Ackers and White sediment transport formula and the White, Paris and Bettess friction relationships, together with a principle of maximum sediment transporting capacity. This concept of maximising the sediment transporting capacity is...report 1981
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Verhagen, H.J. (author), Loman, G.J.A. (author)Norman Hells is situated on the north bank of the Mackenzie River, 145 km south of the Arctic Circle. The use of a pool-wide water flood system for secondary recovery and the features of the oil-bearing structure require six man-made platforms to provide vertical access to the portion of the oil pool that 1 ies beneath the Mackenzie River (60%)....report 1980
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- Peerbolte, E.B. (author) report 1980
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Ribberink, J.S. (author)In Chapter I a derivation of the equations and an extension of the mathematical model will be carried out. The sediment-mixture is separated in a number of fractions - each with a representative grain size - and the equations describing the sediment-movement are split up for every fraction separately. In order to get some insight in the new...report 1980
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Kalkwijk, J.P.T. (author), De Vriend, H.J. (author)The mathematical model presented describes the flow in rivers of which: i the depth is small compared with the width, ii the width is small compared with the radius of curvature, iii the horizontal length scale of the bottom variations is of the order of magnitude of the width. Within these limits, the channel alignment can be arbitrary and it...report 1980
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- Pagee, J.A. van (author) report 1979
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De Vriend, H.J. (author)This report describes an extensive experiment on steady turbulent flow in a rather sharply curved U-shaped flume with a shallow rectangular cross-section, under almost the same conditions as earlier, less extensive measurements in the same flume. The experiment was carried out as a part of a research project aiming at a mathematical model of the...report 1979
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De Vriend, H.J. (author)The relationship between streamline curvature and bed resistance in shallow water flow with little side constraint, as derived in 1970 by H.J. Schoemaker, is reconsidered. Schoemaker concluded that the bed resistance causes the curvature of a free streamline to grow exponentially with the distance along this streamline, thus giving rise to a...report 1979
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- Dronkers, J. (author) report 1978
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Verhagen, H.J. (author)During the dry season shipping between Mongu and Kalabo is impossible, therefore this project was started to improve the situation by dredging. Dredging was started at Mongu harbour, where a new dredger was delivered, assembled and launched. Due to the urgency of the project dredging had to be started before a profound survey concerning the...report 1978
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Farleigh, D.R.P. (author)A mathematical model was used to simulate the long-term movements of the high water slack longitudinal salinity profile in the estuary of the Sg Kuantan, Malaysia. The proven model was then used to predict the effects on salinity of increased abstractions from the estuary under various drought conditions. The predicted longitudinal profiles were...report 1978
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Kerssens, P.J.M. (author)The present report gives a description of the mathematical model for suspended sediment transport. The model can be used to simulate the movement of suspended sediment in a two-dimensional (longitudinal and vertical) flow field. It can also be applied to determine bed level changes caused by any human interference in the regime or geometry of a...report 1978
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De Vriend, H.J. (author)A mathematical model of steady, fully developed laminar flow in curved ducts is developed and used to derive a simplified computation method to be applied in another mathematical model predicting the flow in river bends. The laminar flow model is verified by comparing its results with analytical, numerical and experimental results reported in...report 1978