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Author : Peter Goodwin
Publisher :
ISBN 13 :
Total Pages : 227 pages
Book Rating : 4.:/5 (632 download)
Download or read book Sediment Transport in Unsteady Flows written by Peter Goodwin and published by . This book was released on 1989 with total page 227 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Shu-Qing Yang
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (139 download)
Download or read book Formulae of Sediment Transport in Unsteady Flows (Part 2) written by Shu-Qing Yang and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sediment transport (ST) in unsteady flows is a complex phenomenon that the existing formulae are often invalid to predict. Almost all existing ST formulae assume that sediment transport can be fully determined by parameters in streamwise direction without parameters in vertical direction. Different from this assumption, this paper highlights the importance of vertical motion and the vertical velocity is suggested to represent the vertical motion. A connection between unsteadiness and vertical velocity is established. New formulae in unsteady flows have been developed from inception of sediment motion, sediment discharge to suspension,Äôs Rouse number. It is found that upward vertical velocity plays an important role for sediment transport, its temporal and spatial alternations are responsible for the phase lag phenomenon and bedform formation. Reasonable agreement between the measured and the proposed conceptual model was achieved.
Author : Maryam Alihosseini
Publisher :
ISBN 13 : 9783967290189
Total Pages : pages
Book Rating : 4.2/5 (91 download)
Download or read book Investigation of Sediment Transport Under Steady and Unsteady Flows in Sewer Systems Using the Coupled CFD-DEM Method written by Maryam Alihosseini and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Shiyan Zhang
Publisher :
ISBN 13 :
Total Pages : 380 pages
Book Rating : 4.:/5 (78 download)
Download or read book Numerical Study of Sediment Transport Under Unsteady Flow written by Shiyan Zhang and published by . This book was released on 2011 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: Numerical model for simulating sediment transport in unsteady flow is incomplete in several aspects: first of all, the numerical schemes have been proved suitable for the simulation of flow over rigid bed needs to be reevaluated for unsteady flow over mobile bed; secondly, existing non-equilibrium sediment transport models are empirically developed and therefore lack of consistency regarding the evaluation of the non-equilibrium parameters; thirdly, the sediment transport in various applications have unique features which needs to be considered in the models. Sediment transport in unsteady flows was studied using analytical and numerical methods. A one dimensional (1D) finite volume method (FVM) model was developed. Five popular numerical schemes were implemented into the model and their performances were evaluated under highly unsteady flow condition. A novel physically-based non-equilibrium sediment transport model was established to describe the non-equilibrium sediment transport process. Infiltration effects on flow and sediment transport was included to make the model applicable to simulate irrigation induced soil erosion in furrows. The Laursen (1958) formula was adopted and modified to calculate the erodibility of fine-grain sized soil, and then verified by laboratory and field datasets. The numerical model was applied to a series of simulations of sediment transport in highly unsteady flow including the dam break erosional flow, flash flood in natural rivers and irrigation flows and proved to be applicable in various applications. The first order schemes were able to produce smooth and reasonably accurate results, and spurious oscillations were observed in the simulated results produced by second order schemes. The proposed non-equilibrium sediment transport model yielded better results than several other models in the literatures. The modified Laursen (1958) formula adopted was applicable in calculating the erodibility of the soil in irrigation. Additionally, it was indicated that the effect of the jet erosion and the structural failure of the discontinuous bed topography cannot be properly accounted for due to the limitation of 1D model. The comparison between the simulated and measured sediment discharge hydrographs indicated a potential process associated to the transport of the fine-grain sized soil in the irrigation furrows.
Author : Herman Depeweg
Publisher : CRC Press
ISBN 13 : 1138026956
Total Pages : 314 pages
Book Rating : 4.1/5 (38 download)
Download or read book Sediment Transport in Irrigation Canals written by Herman Depeweg and published by CRC Press. This book was released on 2014-10-01 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sediment transport in irrigation canals influences to a great extent the sustainability of an irrigation system. Unwanted erosion or deposition will not only increase maintenance costs, but may also lead to unfair, unreliable and unequitable distribution of irrigation water to the end users. Proper knowledge of the characteristics, including behaviour and transport of sediment will help to design irrigation systems, plan effi cient and reliable water delivery schedules, to have a controlled deposition of sediments, to estimate and arrange maintenance activities, etc. The main aim of these lecture notes is to present a detailed analysis and physical and mathematical descriptions of sediment transport in irrigation canals and to describe the mathematical model SETRIC that predicts the sediment transport, deposition and entrainment rate as function of time and place for various flow conditions and sediment inputs. The model is typically suited for the simulation of sediment transport under the particular conditions of non-wide irrigation canals where the flow and sediment transport are strongly determined by the operation of the flow control structures. The lecture notes will contribute to an improved understanding of the behaviour of sediments in irrigation canals. They will also help to decide on the appropriate design of the system, the water delivery plans, to evaluate design alternatives and to achieve an adequate and reliable water supply to the farmers.
Author : Geological Survey (U.S.)
Publisher :
ISBN 13 :
Total Pages : 308 pages
Book Rating : 4.3/5 (121 download)
Download or read book Data for Calibrating Unsteady-flow Sediment-transport Models, East Fork River, Wyoming, 1975 written by Geological Survey (U.S.) and published by . This book was released on 1976 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Lechoslaw Suszka
Publisher :
ISBN 13 :
Total Pages : 266 pages
Book Rating : 4.:/5 (85 download)
Download or read book Sediment Transport at Steady and Unsteady Flow written by Lechoslaw Suszka and published by . This book was released on 1988 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : A. Mueller
Publisher : CRC Press
ISBN 13 : 1000151417
Total Pages : 550 pages
Book Rating : 4.0/5 (1 download)
Download or read book Mechanics of Sediment Transport written by A. Mueller and published by CRC Press. This book was released on 2020-08-26 with total page 550 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the studies on sediment transport in suspension and sediment transport in steep channels. It discusses the degradation and particle sorting processes.
Author : Herman Depeweg
Publisher : CRC Press
ISBN 13 : 0203945816
Total Pages : 236 pages
Book Rating : 4.2/5 (39 download)
Download or read book A New Approach to Sediment Transport in the Design and Operation of Irrigation Canals written by Herman Depeweg and published by CRC Press. This book was released on 2007-04-05 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: The transport of sediment greatly influences the sustainability of an irrigation system. Erosion and deposition not only increase maintenance costs, but may result in an inequitable and inadequate distribution of irrigation water. Understanding the behaviour and transport of sediment allows efficient planning and reliable water delivery schedules,
Author : Jonathan William Kean
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (125 download)
Download or read book Bedload Sediment Transport Interdependency in Unsteady Flows written by Jonathan William Kean and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Andrew J. Manning
Publisher : BoD – Books on Demand
ISBN 13 : 1838811184
Total Pages : 208 pages
Book Rating : 4.8/5 (388 download)
Download or read book Sediment Transport written by Andrew J. Manning and published by BoD – Books on Demand. This book was released on 2022-10-12 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effective governance and administration of many aquatic environments requires a detailed understanding of sediment transport and behavioral dynamics. This has both environmental and economic implications, especially where there is any anthropogenic involvement. Sediment Transport - Recent Advances examines sediment transport-related issues in estuarial, coastal, or freshwater environments as well as non-intrusive seismic monitoring of fluid mud, sediment removal from oil storage tanks, and formulae of sediment transport in both unsteady and steady flows.
Author : Pierre Y. Julien
Publisher : Cambridge University Press
ISBN 13 : 1107462770
Total Pages : 527 pages
Book Rating : 4.1/5 (74 download)
Download or read book River Mechanics written by Pierre Y. Julien and published by Cambridge University Press. This book was released on 2018-04-12 with total page 527 pages. Available in PDF, EPUB and Kindle. Book excerpt: Completely updated and with three new chapters, this analysis of river dynamics is invaluable for advanced students, researchers and practitioners.
Author : Ahmed A. Kassem
Publisher :
ISBN 13 :
Total Pages : 312 pages
Book Rating : 4.:/5 (375 download)
Download or read book Two-dimensional Numerical Modeling of Sediment Transport in Unsteady Open-channel Flows written by Ahmed A. Kassem and published by . This book was released on 1996 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Zheng "Ken." Kuai
Publisher :
ISBN 13 :
Total Pages : 131 pages
Book Rating : 4.:/5 (83 download)
Download or read book Non-uniform Sediment Transport and Time Scale Analysis in Unsteady and Non-equilibrium Conditions written by Zheng "Ken." Kuai and published by . This book was released on 2012 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt: While sediment transport in steady uniform flows has been studied extensively, significant amount of sediment movement occurs in unsteady flows. A nonhomogeneous discrete-time Markov chain model is proposed in this study to quantify the bedload discharges under unsteady flow conditions. The proposed two-state Markovian bedload model can be further extended to a three-state sediment transport model by adding a suspended load layer as the third state. As opposed to the homogenous two-state Markovian bedload models in literature, the proposed nonhomogeneous Markov chain model ensures the transition probabilities are really time dependent as they are function of local flow conditions. Furthermore, a full model of both the bedload and the suspended load that does not require an equilibrium sediment transport assumption can be achieved by adding a third layer (the suspended load layer) to the existing two-state model. The proposed stochastic sediment transport model can be used to calculate sediment discharges for an arbitrary size fraction of nonuniform sediment. Sediment transport processes vary at a variety of time scales - from seconds, hours, days to months and years. Recognizing the importance of different varying time scales in the fluvial processes of sediment transport, the Hilbert-Huang Transform method (HHT) is introduced to the field of sediment transport for the time scale analysis. The HHT uses the Empirical Mode Decomposition (EMD) method to decompose a time series into a collection of the Intrinsic Mode Functions (IMFs), and uses the Hilbert Spectral Analysis (HSA) to obtain instantaneous frequency data. The EMD extracts the variability of data with different time scales, and improves the analysis of data series. The HSA can display the succession of time varying time scales,which cannot be captured by the often-used Fast Fourier Transform (FFT) method. This study is one of the earlier attempts to introduce the state-of-the-art data analysis technique for the multiple time sales analysis of sediment transport processes. Three practical applications of the HHT method for data analysis of both suspended sediment and bedload transport time series are presented.
Author : JORGEN. FREDSOE
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (965 download)
Download or read book UNSTEADY FLOW IN ALLUVIAL STREAMS AT HIGH SEDIMENT TRANSPORT RATES. written by JORGEN. FREDSOE and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Le Wang
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (16 download)
Download or read book Bedload Sediment Transport and Bed Evolution in Steady and Unsteady Flows written by Le Wang and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Peter Nielsen
Publisher : World Scientific
ISBN 13 : 9789810204730
Total Pages : 356 pages
Book Rating : 4.2/5 (47 download)
Download or read book Coastal Bottom Boundary Layers and Sediment Transport written by Peter Nielsen and published by World Scientific. This book was released on 1992 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is intended as a useful handbook for professionals and researchers in the areas of Physical Oceanography, Marine Geology, Coastal Geomorphology and Coastal Engineering and as a text for graduate students in these fields. With its emphasis on boundary layer flow and basic sediment transport modelling, it is meant to help fill the gap between general hydrodynamic texts and descriptive texts on marine and coastal sedimentary processes. The book commences with a review of coastal bottom boundary layer flows including the boundary layer interaction between waves and steady currents. The concept of eddy viscosity for these flows is discussed in depth because of its relation to sediment diffusivity. The quasi-steady processes of sediment transport over flat beds are discussed. Small scale coastal bedforms and the corresponding hydraulic roughness are described. The motion of suspended sand particles is studied in detail with emphasis on the possible suspension maintaining mechanisms in coastal flows. Sediment pickup functions are provided for unsteady flows. A new combined convection-diffusion model is provided for suspended sediment distributions. Different methods of sediment transport model building are presented together with some classical models.
