Simulating Nearshore Environments
DOWNLOAD
Download Simulating Nearshore Environments PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Simulating Nearshore Environments book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page
Simulating Nearshore Environments
DOWNLOAD
Author : P.A. Martinez
language : en
Publisher: Elsevier
Release Date : 2013-10-22
Simulating Nearshore Environments written by P.A. Martinez and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-10-22 with Science categories.
Simulating Nearshore Environments provides computer procedures that realistically represent nearshore processes and supplement or replace trial and error methodology. The procedures simulate transport by waves and fluvial processes on beaches and deltas at various scales. They will aid coastal engineers, oceanographers and sedimentary geologists who focus on both modern and ancient nearshore deposits. How do you simulate nearshore processes using a computer? Can evolving deltaic and coastal environments be simulated realistically by mathematically representing the physical processes that create them? Once the physics and mathematical formulation are described, what are the techniques for transforming them into computer programs? The authors deal with all these aspects and take a "how to" approach in guiding the reader through the development of computer models for simulating sediment transport in coastal environments. In addition to describing the devised computer programs, the book provides a basis for those wishing to formulate their own mathematical models for simulating nearshore processes.
Comparison Of Computer Simulation Models With Field Data From Nearshore Environments
DOWNLOAD
Author : William T. Fox
language : en
Publisher:
Release Date : 1976
Comparison Of Computer Simulation Models With Field Data From Nearshore Environments written by William T. Fox and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with Coast changes categories.
Computer simulation models of coastal processes provide an accurate means of predicting wave and current conditions in the nearshore environment. A 7-year study was undertaken to develop and test a series of computer simulation models based on time-series data from field studies. The field studies include Stevensville, Mich.; Sheboygan, Wis.; Mustang Island, Texas; Cedar Island, Va.; South Beach, Ore.; Zion, Ill. and South Haven, Mich.; and Plum Island, Mass. A series of computer programs were developed for analysis and plotting of the field data. A Fourier analysis program was used to plot smoothed curves for weather, waves and current variables. Topographic maps and maps of erosion and deposition were plotted based on daily beach and nearshore profiles. An 'Area-time Prism' model was formulated to graphically portray changes in beach and nearshore bar configuration through time. A 'Coastal Process Simulation Model' was developed to predict wave and longshore current conditions, and beach and bar erosion on the eastern shore of Lake Michigan. A 'Coastal Storm Model' based on the size, shape and intensity of a coastal storm predicts wind, waves and currents for any coastal orientation. The coastal storm model can hindcast conditions of past storms or produce short term forecast in developing storms. The model is based on an inverted normal curve which is rotated around the center of a storm system.
Computer Modeling And Simulation
DOWNLOAD
Author : Brandon N. Birch
language : en
Publisher:
Release Date : 1998
Computer Modeling And Simulation written by Brandon N. Birch and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with categories.
Nearshore Hydrodynamic Model Comparisons And Predictions Of Bathymetric Evolution
DOWNLOAD
Author : Jamie M. Lescinski
language : en
Publisher:
Release Date : 2004
Nearshore Hydrodynamic Model Comparisons And Predictions Of Bathymetric Evolution written by Jamie M. Lescinski and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Hydrodynamics categories.
The surf zone exhibits large energetic signals from wave shoaling and subsequent dissipation due to breaking, forcing circulation. The bathymetry responds to the wave and wave-induced circulation with the growth, transport, and destruction of large scale bathymetric features, such as mega ripples and sand bars. There is an obvious fluctuation of energy, which results in the continual change of the coastline, indicating a need for a predictive tool that includes a feedback between the hydrodynamics and morphology. Modeling of the nearshore environment has been of active interest to the engineering and oceanographic research community for close to a century. Wave and circulation prediction have improved dramatically since the advent of coastal modeling, and has reached a point in the modern day where the solution of the full Navier Stokes equation is in the foreseeable future. However, the computational expense associated with these highly skilled predictions of waves and currents are not always suitable for practical application in the field of coastal engineering. Therefore, in practice, engineers must compromise between computational efficiency and prediction skill of a model. A comparison of various model prediction skills and further discussion of such practical applications will occur in this manuscript. In contrast to the highly evolved wave and current models presently available, bathymetric evolution modeling is still in its infancy and has more recently become a primary focus of the nearshore researching community. The success of sediment transport predictions, and subsequent morphological evolution predictions, among other things, are dependant upon the included physics of the model, quality of input data, and stability of the modeling routines. In this study, hydrodynamic models were compared based upon their skill exhibited when predicting cross-shore profiles of nonlinear wave and wave velocity properties: skewness and asymmetry. These nonlinear characteristics have proven to be challenging to predict in a variety of hydrodynamic climates in combination with variable water depths. Predictions of skewness and asymmetry by three types of models were compared, which ranged dramatically in computational expense and complexity. The more complex models were derived using the physics-based governing equations of fluid systems, where the less complex and extremely computationally efficient models are empirically developed based on physics of the nearshore system. The most complex wave evolution model used in this study was FUNWAVE, which is a fully nonlinear Boussinesq wave model (Wei et al., 1995). The nonlinear, phase-resolving, fully dispersive wave model of Kaihatu (2001), in which the evolution of the waves is governed by the parabolic approximated mild-slope equation, is the second complex wave evolution model. Wave and velocity skewness and asymmetry are thus computed from the predicted time series from each of the two nonlinear wave models. The third type of model was empirical formulations developed to predict wave velocity skewness and asymmetry. Two of these empirical models were used in this study; the Doering and Bowen (1995) formulations, which were derived through bispectral analysis of wave evolution, and the Doering et al. (2000) formula, which was generated using an evolutionary algorithm. These empirically-derived expressions are currently being utilized, but have not been thoroughly testes, hence our comparisons of nonlinear wave characteristics between multiple model predictions and observations. Predictions of skewness and asymmetry were used to gauge the skill of these models. The quantity of wave skewness and asymmetry changes vertically in the water column, due to effects by the bathymetry in the wave boundary layer versus the free streaming flow. The characteristics of the nearshore flow field have been of interest to the engineering community because of the vital role these nonlinear quantities play in predictions of the morphologic evolution. Hence, our investigation of the quality of predictions of nonlinear wave properties by these three types of predictive tools. Another focus of coastal modelers is to ably simulate the hydrodynamics and subsequent morphodynamics of the nearshore using a complete feedback system; i.e. the predicted bathymetry after a pre-defined time step would be used as the initial bathymetry for the following time step and so on. A full feedback model of this sort is afflicted with issues ranging from model validity to stability. Also, there are currently few data sets available which contain all the necessary measurements required to thoroughly test such a proposed set of models. In the second half of this study a model series was implemented, using a feedback system, to simulate the 1DH (1-dimensional-horizontal), cross-shore evolution of sand beaches for a lab and a field experiment. The nonlinear, fully dispersive wave model of Kaihatu (2001) was used to predict the cross-shore evolution of wave field. A Bailard (1981) sediment transport model was used to predict the local cross-shore change of the bathymetry, as a function of time, from which the new cross-shore profile was predicted, and subsequently used as the initial bathymetry for the following time step. The overall goal of this study is to make progress in the direction of building community models, in which compatible wave, circulation, and transport models of differing degrees of complexity can be used in combination for simulating the nearshore environment. It is hopeful that in the near future we will be capable of simulating long term coastal evolution in real time, therefore, providing the ultimate modeling tool for the researching and practicing engineering community.
Free Surface Flow Simulation In Estuarine And Coastal Environments
DOWNLOAD
Author : Andrea Gilberto Filippini
language : en
Publisher:
Release Date : 2016
Free Surface Flow Simulation In Estuarine And Coastal Environments written by Andrea Gilberto Filippini and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
Over the last decades, there has been considerable attention in the accurate mathematical modeling and numerical simulations of free surface wave propagation in near-shore environments. A physical correct description of the large scale phenomena, which take place in the shallow water region, must account for strong nonlinear and dispersive effects, along with the interaction with complex topographies. First, a study on the behavior in nonlinear regime of different Boussinesq-type models is proposed, showing the advantage of using fully-nonlinear models with respect to weakly-nonlinear and weakly dispersive models (commonly employed). Secondly, a new flexible strategy for solving the fully-nonlinear and weakly-dispersive Green-Naghdi equations is presented, which allows to enhance an existing shallow water code by simply adding an algebraic term to the momentum balance and is particularly adapted for the use of hybrid techniques for wave breaking. Moreover, the first discretization of the Green-Naghdi equations on unstructured meshes is proposed via hybrid finite volume/ finite element schemes. Finally, the models and the methods developed in the thesis are deployed to study the physical problem of bore formation in convergent alluvial estuary, providing the first characterization of natural estuaries in terms of bore inception.
Broad Scale Coastal Simulation
DOWNLOAD
Author : Robert J. Nicholls
language : en
Publisher: Springer
Release Date : 2015-08-26
Broad Scale Coastal Simulation written by Robert J. Nicholls and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-08-26 with Science categories.
Coastal zones exemplify the environmental pressures we face: their beauty attracts settlement, they offer potential for diverse economic activities, and they are sensitive natural habitats for important species, as well as providing a range of ecosystem services. They are also extremely vulnerable to the vicissitudes of climate change, which include rising sea levels and changes in extreme events such as storms. With large populations living in coastal and estuarine cities facing the ongoing threat of inundation, coordinated management is essential, especially as coastal zones form a linked system in which piecemeal, uncoordinated management could be counterproductive.
Memoirs
DOWNLOAD
Author : JOHN WARVELLE HARBAUGH
language : en
Publisher: Lulu.com
Release Date : 2013-02-23
Memoirs written by JOHN WARVELLE HARBAUGH and has been published by Lulu.com this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-02-23 with History categories.
John W. Harbaugh has had a career in geology and academia and is a Professor Emeritus of Geological Sciences at Stanford University. He is the author or coauthor of 12 books and has also been connected with oil industry for much of his career. He currently manages oil and gas properties in Oklahoma and Texas.
Hydrodynamic Characteristics And Pollutant Transport In Rivers And Nearshore Environments
DOWNLOAD
Author : Biyun Guo
language : en
Publisher: Frontiers Media SA
Release Date : 2024-03-01
Hydrodynamic Characteristics And Pollutant Transport In Rivers And Nearshore Environments written by Biyun Guo and has been published by Frontiers Media SA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024-03-01 with Science categories.
With the development of societies and economies, the process of industrialization and urban modernization is accelerating, urban populations are increasing, and more and more wastewater is generated and released. Large quantities of hazardous industrial and agricultural wastewater and domestic sewage are discharged directly into reservoirs, lakes, rivers and the sea, without adequate treatment. The wide range of pollutants discharged can degrade, interact, and transform in aquatic environments. When light, temperature, nutrients and other natural conditions are suitable, it is common for algal species to burst into bloom, causing serious damage to the ecological environment of the receiving water body. As the flux of river discharge into the sea increases year by year, the deterioration of coastal water environments accelerates. Meanwhile, variations in climate and vegetation impact basin hydrological proceses and river runoff into the sea.
From Depositional Systems To Sedimentary Successions On The Norwegian Continental Margin
DOWNLOAD
Author : Allard W. Martinius
language : en
Publisher: John Wiley & Sons
Release Date : 2014-10-06
From Depositional Systems To Sedimentary Successions On The Norwegian Continental Margin written by Allard W. Martinius and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-10-06 with Science categories.
The Norwegian Continental Shelf (NCS), focus of this special publication, is a prolific hydrocarbon region and both exploration and production activity remains high to this day with a positive production outlook. A key element today and in the future is to couple technological developments to improving our understanding of specific geological situations. The theme of the publication reflects the immense efforts made by all industry operators and their academic partners on the NCS to understand in detail the structural setting, sedimentology and stratigraphy of the hydrocarbon bearing units and their source and seal. The papers cover a wide spectrum of depositional environments ranging from alluvial fans to deepwater fans, in almost every climate type from arid through humid to glacial, and in a variety of tectonic settings. Special attention is given to the integration of both analogue studies and process-based models with the insights gained from extensive subsurface datasets.
Sandy Beach Morphodynamics
DOWNLOAD
Author : Derek Jackson
language : en
Publisher: Elsevier
Release Date : 2020-05-19
Sandy Beach Morphodynamics written by Derek Jackson and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-05-19 with Science categories.
Sandy beaches represent some of the most dynamic environments on Earth and examining their morphodynamic behaviour over different temporal and spatial scales is challenging, relying on multidisciplinary approaches and techniques. Sandy Beach Morphodynamics brings together the latest research on beach systems and their morphodynamics and the ways in which they are studied in 29 chapters that review the full spectrum of beach morphodynamics. The chapters are written by leading experts in the field and provide introductory level understanding of physical processes and resulting landforms, along with more advanced discussions. Includes chapters that are written by the world’s leading experts, including the latest up-to-date thinking on a variety of subject areas Covers state-of-the-art techniques, bringing the reader the latest technologies/methods being used to understand beach systems Presents a clear-and-concise description of processes and techniques that enables a clear understanding of coastal processes