Download or read book Three Dimensional Modelling of Hydrodynamics and Tidal Flushing in Deep Bay written by Aiguo Qian and published by . This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Three-dimensional Modelling of Hydrodynamics and Tidal Flushing in Deep Bay" by Aiguo, Qian, 乾愛國, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of thesis entitled "Three-Dimensional Modelling of Hydrodynamics and Tidal Flushing in Deep Bay" submitted by QIAN Aiguo for the degree of Master of Philosophy at the University of Hong Kong in December, 2003 Deep Bay is a semi-enclosed shallow bay on the eastern side of the Pearl Estuary, between Shenzhen to the north and the New Territories of Hong Kong to the south. As a result of large-scale development in Shenzhen, Deep Bay has experienced severe water quality deterioration in recent years. Some isolated water quality studies of Deep Bay have been conducted. However, Deep Bay is a unique embayment which exhibits large seasonal salinity variation, and no three-dimensional (3D) modeling of the tidal flushing process has yet been done. The flushing time, a key parameter that governs water quality and biological processes, needs to be quantified using a robust 3D hydrodynamic model. In the present study, a 3D hydrodynamic model of Deep Bay is developed and the 3D salinity and tidal circulation of the bay are systematically discussed. The flushing and dispersion features are studied, and the tidal flats in inner Deep Bay are simulated. The Environmental Fluid Dynamic Code (EFDC) is used to develop the 3D hydrodynamic model of Deep Bay. The topographical configuration, space and time scales, boundaries and boundary conditions are selected based on physical consideration and extensive numerical tests. The model is calibrated and verified against two different field data sets respectively for the dry and wet season. The effect of salinity on velocity field is also examined via a numerical experiment by eliminating any salinity gradient from the measured wet season tidal conditions. The analysis of field measurements and numerical modeling is synthesized, and it is demonstrated that the flows within Deep Bay are characteristic of a well mixed/weakly stratified estuary. The small freshwater flows make insignificant contribution to the salinity structure of the outer Deep Bay area, which is mainly influenced by the inflow introduced from the Pearl Estuary. Based on the validated hydrodynamic model, the tidal flushing is studied using a 3D conservative mass transport model. The flushing times of different parts of Deep Bay are quantified via systematic numerical simulation including: i) real tidal forcing on Deep Bay model and ii) typical M2 tides on a local model with only one tidal open boundary. It is demonstrated that the flushing rate is approximately 0.04 per day (flushing time 25 days) in the inner bay, and increases beyond the middle bay rapidly, to 0.3-0.4 per day at the outer end. The flushing rate is significantly affected in both the dry and wet season by salinity gradients. The dispersion of a continuous pollutant source into Deep Bay is also studied. It is demonstrated that this dispersion conforms to the flushing features within the bay. The source remains in the inner bay area with a high concentration, but is rapidly diluted beyond the Shekou cape cross section of middle Deep Bay. It is therefore demonstrated that severe water quality deterioration in Deep Bay occurs mainly in its inner bay area, and that any "red tide" occurring from time to time in inner Deep Bay will not spread to the bay as a whole. DOI: 10.5353/th_b2979900 Subjects: Hydrodynamics - Computer sim

Download or read book Environmental Hydraulics Two Volume Set written by George C. Christodoulou and published by CRC Press. This book was released on 2010-06-09 with total page 1288 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the last two decades environmental hydraulics as an academic discipline has expanded considerably, caused by growing concerns over water environmental issues associated with pollution and water balance problems on regional and global scale. These issues require a thorough understanding of processes related to environmental flows and transport

Download or read book ADCIRC written by and published by . This book was released on 1994 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Three dimensional hydrodynamic model developments for a Delaware River and Bay nowcast forecast system written by Richard A. Schmalz and published by . This book was released on 2011 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Environment in Asia Pacific Harbours written by Eric Wolanski and published by Springer Science & Business Media. This book was released on 2006-07-30 with total page 495 pages. Available in PDF, EPUB and Kindle. Book excerpt: Urbanization has reached unprecedented levels in the estuarine and coastal zone, particularly in the Asia Pacific region where mega-cities and mega-harbours are still growing. This book demonstrates the different solutions and pitfalls, successes and failures in a large number of ports and harbours in the Asia Pacific Region, and shows how science can provide ecologically sustainable solutions that apply wherever the growth of mega-harbours occurs.

Download or read book Three dimensional Hydrodynamic Model Developments for a Galveston Bay Nowcast forecast System written by Richard A. Schmalz and published by . This book was released on 2000 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Three dimensional Numerical Simulation of Mobile bed Hydrodynamics written by Miodrag Spasojevic and published by . This book was released on 1993 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This report describes the theoretical principles of three-dimensional sediment transport and bed-evolution processes, and numerical solution of the appropriate governing equations. It also includes technical documentation and user's instructions for the sediment-operations program module developed as an integral part of the CH3D code."--P. ii.

Download or read book Use of Three dimensional Hydrodynamic Model and Accurate Advection Scheme for Modeling Flushing Dynamics and Developing Segmentation Schemes in Indian River Lagoon written by Haifeng Du and published by . This book was released on 2000 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of a Three dimensional Hydrodynamic Model Applied to Chesapeake Bay Through Long term Simulation of Transport Processes written by Sŭng-chʻan Kim and published by . This book was released on 2013 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book User s Guide for a Three dimensional Numerical Hydrodynamic Salinity and Temperature Model of Chesapeake Bay written by Billy H. Johnson and published by . This book was released on 1991 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Numerical Model for the Simulation of Tidal Hydrodynamics in Shallow Irregular Estuaries written by Frank D. Masch and published by . This book was released on 1969 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Three dimensional Models of Marine and Estuarine Dynamics written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Three dimensional Models of Marine and Estuarine Dynamics written by Jacques C. J. Nihoul and published by . This book was released on 1987 with total page 629 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Committee on Tidal Hydraulics Report written by and published by . This book was released on 1980 with total page 640 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Three Dimensional Coastal Flow Modelling Using the Finite Volume Method written by Reza Ghiassi and published by . This book was released on 1995 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: Three-dimensional hydrodynamic modelling of estuarine and coastal basins is an efficient means of analysing and predicting water flow characteristics for further use in sedimentation, morphological and environmental studies. To date, two-stage solution schemes have generally been used in such models, whereas in this thesis a one-stage solution formulation is introduced and applied for three-dimensional coastal hydrodynamic modelling. The governing hydrodynamic equations are reviewed in their integral form by satisfying the conservation laws of mass and momentum and rewriting them in their differential equation form for a three-dimensional spatial domain. The original continuity equation is modified for the cells in the surface layer of a multi-layer computational domain, giving rise to the establishment of the one-stage solution algorithm. The general momentum equations are rewritten, with regard to the conditions applicable to coastal waters. The integral form of the governing hydrodynamic equations have been discretized by applying the finite volume method. An orthogonal Cartesian co-ordinate system have been chosen for discretizing the computational domain. The equations have been discretized for mesh cells within the boundary and, consequently, corrections made to the discretized equations for the cells adjacent to a boundary. The one-stage solution formulation is explained in detail for solving the discretized equations using the Alternating Direction Implicit scheme. A new computer model, namely THEMFIV, has been developed for three-dimensional numerical flow simulation, based upon the one-stage algorithm. A series of experimental tests, undertaken for a laboratory model rectangular harbour, are detailed. The measured velocity values are presented to show the velocity field profile within the rectangular harbour. The numerical model has been run for several case studies to simulate (1) two-dimensional tidal circulation in the rectangular harbour, (2) three-dimensional flow.

Download or read book An Intercomparison Three dimensional Tidal Hydrodynamic Models of the Irish Sea written by A. M. Davies 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 Contributions to Modern and Ancient Tidal Sedimentology written by Bernadette Tessier and published by John Wiley & Sons. This book was released on 2016-03-03 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tidal deposits have been a specific research topic for about 40 years, and whilst this has resulted in a proliferation of papers in scientific journals, there have only been a few book-length syntheses. Over the years, tidal sedimentology has been reinforced by fluid mechanics and numerical modelling but has remained rooted in facies and stratigraphic studies. Recent developments in tidal sedimentology lean toward a more quantitative assessment of the imprint of tides in the facies record of intertidal and shallow subtidal areas. They highlight the increasing relevance of tidal deposits studies, from high resolution subsurface reservoir geology to climate change and sea-level rise. This volume gathers 17 contributions to the Tidalites 2012 congress held in Caen, France. It reflects current advances in the sedimentology and stratigraphy of tidal deposits, in both ancient and modern environments. It shows the current diversity of this field of research, through a wide spectrum of methods including remote sensing, in-situ hydrodynamical measurements, and ichnology, in addition to classic field studies and petrography.