Download or read book Particle tracking model of sediment transport written by A. Kelsey and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Particle Tracking Model of Sediment Transport written by A. Kelsey and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Particle Tracking Model for Sediment Transport in the Nearshore Zone written by D. M. L. Johnson and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Stochastic Particle Tracking Modeling for Sediment Transport in Extreme Flow Environments written by 林彥廷 and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Particle Tracking Sediment Transport Model for the Buffalo River written by Pradeep Nagaraja and published by . This book was released on 2008 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: Particle tracking model (PTM) is developed to simulate sediment movement in a river. It includes the same processes as traditional Eulerian (control volume) based models, but adds the capability to follow the pathways of individual particles, which is useful for making remediation decisions that might include, for example, environmental dredging. The PTM tracks the movement of particles based on velocities and dispersion fields generated from a hydrodynamic model, which is a curvilinear, orthogonal grid-based model that can be conveniently used to follow the system boundaries. The movement of a particle is computed using a random walk algorithm. The PTM can function either as a stand-alone model or can be coupled to a hydrodynamic based model such as the Estuarine, Coastal and Ocean Model (ECOM), as was done in this study. The advantage of using the PTM as a stand-alone model is that it could be used independently for specific cases and hence, would save on computation time. However, it can be coupled with a hydrodynamic model in cases where the velocity and dispersion fields are sensitive to particle movements or bed elevation changes. The PTM includes boundary interactions such as reflection, deposition and resuspension, and can be compared with more traditional sediment transport models by correlating the number of particles in a grid cell to a concentration. The PTM has been used in an application to track the sediments in the Buffalo River, and provides a useful tool for current discussions of possible sediment remediation options.

Download or read book Stochastic Particle Tracking Modeling for Sediment Transport in Open Channel Flows written by Jungsun Oh and published by . This book was released on 2011 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sediment transport in flow has a practical impact on environmental and economic aspects of human society, for instance, water quality, hydraulic structures and land resources. A systematic understanding of the sediment transport processes is of critical significance to establish proper water resources and sediment management plans. Both random properties of flows and varying properties of sediment particles can induce stochastic nature of sediment particle movement in the flows. Thus, stochastic approaches or analyses are beneficial to analyzing the variability associated with the movement of sediment particles. In this context, the focus of this study is to model various features of sediment transport in open channel flow with stochastic approaches.^The scope of the study includes the following main issues: the movement of sediment particles in turbulent open channel flows in the occurrences of extreme flows, the deposition and resuspension processes of sediment particles, sediment concentrations and its uncertainty, and various modeling framework of stochastic particle tracking models. Turbulence in a flow is a primary source of stochastic property of particle movement in the flow. Furthermore, extreme flows that might occur occasionally in a random manner reinforce the randomness of the movement of sediment particles in the flow. The volatile flow velocity of extreme flows will not only affect the mean trend of particle movement but also intensify the uncertainty of particle movement. Specifically, since extreme flow events randomly occur per se, the random manner of the occurrences generates the stochastic property that affects the movement of sediment particles.^Thus, it is effective to employ stochastic approaches for describing sediment transport processes associated with uncertainty. Herein, both a & lsquo;stochastic diffusion process & rsquo; and a & lsquo;stochastic jump diffusion process & rsquo; are introduced to describe stochastic particle movement in open channel flows. The & lsquo;stochastic jump diffusion process & rsquo; represents the particle movement in response to extreme flow events that randomly occur in a turbulent open channel flow, whereas the & lsquo;stochastic diffusion process & rsquo; characterizes the particle movement in a turbulent open channel flow. As a result, both the stochastic diffusion particle tracking model (SD-PTM) and the stochastic jump diffusion particle tracking model (SJD-PTM) can present particle trajectories, and roughly estimated instantaneous velocities.^The ensemble statistics of the particle trajectories and velocities radically contain information on the stochastic characteristics of sediment particle movement. The SD-PTM and SJD-PTM to estimate particle trajectory and velocity is verified with data of Sumer and Oguz (1978), Muste and Patel (1997), Cuthberson and Ervine (2007) and Muste et al. (2009). The sediment concentration and sediment flux are highly-sought, practical variables in that the existence and amount of suspended sediments in surface waters have a direct influence on water quality and its suitability for drinking and industrial purposes. Especially, the estimation of sediment concentrations demonstrates the transporting process of suspended sediment through its spatial and temporal distributions. The sediment concentrations play a significant role as a pragmatic indicator in the decision making process.^Thus, the previous-stated particle-based stochastic approach for sediment transport is enhanced to predict the suspended sediment concentration, and to quantify the uncertainty of the sediment concentrations. The method also allows for particle entrainment into flows and particle settlement on the bed as main processes in open channel flows. Through multiple realizations of the particle movement with stochastic properties, the SD-PTM shows not only sediment concentrations at a specific location and time but also uncertainty for the estimated sediment concentrations. The proposed method, in this context, is a more straightforward method to evaluate uncertainty due to stochastic properties in the particle movement and a unique way to present the uncertainty of sediment concentrations. The proposed stochastic particle tracking model for sediment concentrations is verified with data of Coleman (1986).^The final goal of this study is to pursue further investigation into two different types of stochastic particle tracking approaches describing sediment particle movement associated with randomness. The different types of approaches are classified into the & lsquo;univariate & rsquo; and the & lsquo;multivariate & rsquo; stochastic particle tracking models according to the selection of key stochastic variables that describe the randomness of natural phenomena. In the & lsquo;univariate & rsquo; stochastic particle tracking model, one state vector (e.g., particle position) is regarded as a targeted variable. The above proposed models can be thought of as the & lsquo;univariate & rsquo; stochastic particle tracking model. In the & lsquo;multivariate & rsquo; stochastic particle tracking model, the sediment particle velocity and position are joint Markovian state variables, since the flow velocity evolves in time according to a generalized stochastic differential equation.^Model comparisons are performed and both models are verified with data of Sumer and Oguz (1978).

Download or read book Particle Tracking Model PTM II Overview of Features and Capabilities written by and published by . This book was released on 2005 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Dredging Operations and Engineering Research (DOER) Technical Note (TN) is the second in a series. It describes the features and capabilities of a new Particle Tracking Model (PTM) for analysis of sediment transport and sediment pathways in coastal waters, estuaries, rivers, and waterways. This note is applicable to Version 1.0 of PTM. The PTM graphical user interface is described in the first TN (Demirbilek et al. 2005a) in this series. A tutorial with examples is described in the third TN (Demirbilek et al. 2005b). PTM has been designed to meet the needs of two U.S. Army Corps of Engineers (USACE) research programs, the Coastal Inlets Research Program (CIRP) and the DOER Program. Examples are presented that illustrate key features of the PTM s application in coastal and estuarine environments. Accurate prediction of the fate of sediments and other waterborne particulates is a key element in coastal engineering and dredging operations. The PTM simulates sediment movement in a flow field, including erosion, transport, settling, and deposition. In addition to predicting sediment transport pathways and sediment fate, the model produces maps of sediment transport processes, such as sediment mobility, which can be useful in understanding sediment behavior. The reader is referred to MacDonald and Davies (2005) for a comprehensive description of the theoretical formulation and numerical implementation aspects of the PTM.

Download or read book Particle Tracking Model PTM in the SMS written by Zeki Demirbilek and published by . This book was released on 2005 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Particle Tracking Model PTM in the SMS I Graphical Interface written by and published by . This book was released on 2005 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Dredging Operations and Environmental Research (DOER) Technical Note (TN) describes the graphical interface for the Particle Tracking Model (PTM). The Coastal Inlets Research Program (CIRP) and the DOER Program are jointly developing the PTM. The PTM is described in a series of three technical notes. This technical note, Part I, describes the graphical user interface of Version 1.0 of PTM. Part II (Demirbilek et al. 2005a) provides an overview of general features and capabilities of PTM. Part III (Demirbilek et al. 2005b) is a tutorial with examples. The PTM has been developed for application to dredging and coastal projects, including dredged material dispersion and fate, sediment pathway and fate, and constituent transport. A technical report (MacDonald and Davies, in preparation) provides details about the theory and implementation aspects of the PTM. PTM methodology is based on a parcel calculation technique, in which parcels represent a given mass of sediment subjected to the same forces and exhibiting the same kinematics as a single sediment particle. Each parcel has its own set of attributes (e.g., grain diameter, specific gravity), which influence parcel behavior (entrainment, transport, settling). The PTM employs a Lagrangian particle tracking technique to estimate migration of sediment particles as influenced by the hydrodynamic forcing inputs, including current velocity and wave fields. This approach compliments the Eularian sediment transport and morphological models, and can provide information about a specified subset of sediment processes. This information may be applied in projects without the more resource-intensive application of a Eularian sediment transport model.

Download or read book Application of Queueing Theory and Stochastic Particle Tracking Model to Simulating Stochastic Sediment Transport written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Using Machine Learning Particle Tracking and Grain Shape Modeling to Characterize Bedload Sediment Transport written by Matthew R. Rushlow (S.B.) and published by . This book was released on 2020 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rivers are generally understood through their bulk characteristics and on a river by river scale, while the motion and characteristics of the individual sediment that progresses through those rivers is poorly understood. This project sought to track the bed-load transport of individual natural and artificial sediment grains through a flume to understand the effects of grain shape on motion, and creation of multi spherical approximations of natural sediment grains for use in numerical simulations. Machine learning tools processed the position of millions of grains through a flume. Successful identification and tracking of nearly 75% of all grains within a flume, and multi spherical approximations of natural grains using 20 spheres or less that reproduced important shape characteristics of natural grains were achieved. Accurate grain locations allowed the possibility for velocities, accelerations, entrainments, and flux to be studied with uniquely high resolution. Efficient flume simulations that better represent actual sediment became possible.

Download or read book Coastal and Shelf Sediment Transport written by Peter S. Balson and published by Geological Society of London. This book was released on 2007 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume provides a timely review of a representative selection of the different approaches undertaken for coastal and shelf investigations, operating at a variety of temporal and spatial scales, within different regions of the UK/European continental shelf, and elsewhere.

Download or read book Sediment Transport written by Andrew Manning and published by BoD – Books on Demand. This book was released on 2013-03-13 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sediment Transport Processes and their Modelling Applications is a book which covers a wide range of topics. The effective management of many aquatic environments, requires a detailed understanding of sediment dynamics. This has both environmental and economic implications, especially where there is any anthropogenic involvement. Numerical models are often the tool used for predicting the transport and fate of sediment movement in these situations, as they can estimate the various spatial and temporal fluxes. However, the physical sedimentary processes can vary quite considerably depending upon whether the local sediments are fully cohesive, non-cohesive, or a mixture of both types. For this reason for more than half a century, scientists, engineers, hydrologists and mathematicians have all been continuing to conduct research into the many aspects which influence sediment transport. These issues range from processes such as scour, erosion and deposition, to how sediment process observations can be applied in sediment transport modelling frameworks. This book reports the findings from recent research in applied sediment transport which has been conducted in a wide range of aquatic environments. The research was carried out by researchers who specialise in the transport of sediments and related issues.

Download or read book Seameo Tropmed Technical Meeting on Advanced Knowledge on the Vaccines for Tropical Deseases of Public Health Importance in Southeast Asia written by and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Sediment Transport and Morphodynamics Modelling for Coasts and Shallow Environments written by Vanesa Magar and published by CRC Press. This book was released on 2020-03-09 with total page 231 pages. Available in PDF, EPUB and Kindle. Book excerpt: This reference for engineers, and graduate students covers sediment transport and morphodynamics modelling in nearshore environments. It presents the fundamentals required for understanding the physics and for setting up numerical models. This book covers hydrodynamics of estuarine and coastal environments, properties of seafloor and estuarine composition, and hydroenvironmental interactions; emphasising the inter-relations of small- and large-scale processes, and short- and large-evolution timescales. The focus is, principally, on the application of shallow-water theory, but some surface wave models, and coupling of shallow-water models with surface waves is also discussed to some extent. The guidance on running regional models and the case studies presented are directed to managed realignment, coastal protection, climate change impacts, and offshore renewables. Key features: Gives a balanced review of this rich interdisciplinary area Bridges practical engineering and research Offers both large- and small-scale application Suits graduate students and researchers as well as consulting engineers Vanesa Magar is a senior researcher and associate professor at the Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE) in Baja California, Mexico. She was formerly a researcher and then a lecturer at Plymouth University, UK.

Download or read book An Introduction To Hydraulics Of Fine Sediment Transport written by Ashish J Mehta and published by World Scientific Publishing Company. This book was released on 2013-09-30 with total page 1060 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents observations on the phenomena of fine sediment transport and their explanations under process-related divisions such as flocculation, erosion, and deposition.The text is a compilation of the author's lecture notes from nearly four decades of teaching and guiding graduate students in civil and coastal engineering. Illustrations of fine sediment transport processes and their complexities given in the book are taken from field and laboratory-based observations by the author and his students, as well as numerous investigators.The wide-ranging composition of particles (of inorganic and organic matter), their universal presence and their complex interactions with hydraulic forces make this branch of science a difficult one to deal with in a single treatise. It is therefore essential to study fine sediment transport as an independent subject rather than cover it in no more than a single chapter as many texts on coarse sediment transport have done.Even though the entire coverage is “introductory”, the twelve chapters collectively include more material than what can be reasonably dealt with in a one semester, three-credit course.The book includes an extensive description of the components of fine-grained — especially cohesive — sediment transport. It covers the development of the subject in scientific and engineering applications mainly from the 1950s to its present state. Solved examples and chapter-end exercises are also included.This text is aimed at senior civil engineering undergraduates and graduate students who, in the normal course of their study, seldom come across the subject of fine sediment transport in their curricula. Interested students should have a basic understanding of the mechanics of fluid flow and open channel hydraulics.

Download or read book Modeling of Estuarial Fine Sediment Transport for Tracking Pollutant Movement written by E. J. Hayter and published by . This book was released on 1982 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: