- By : Alok Srivastava
- Shorelines
A Least-squares Approach to Improved Shoreline Modeling
Author: Alok Srivastava
Publisher:
ISBN:
Category : Shorelines
Languages : en
Pages : 170
Book Description
Abstract: The primary objectives of this thesis are to develop and implement a quantitative method for predicting shoreline changes within reasonable temporal and spatial limits, and to better understand the processes controlling shoreline movement. A mathematical model for the prediction of future shorelines is developed for integration of the relevant spatio-temporal shoreline data to support continued analysis of on-going research in the coastal regions. This shoreline-erosion prediction model of Lake Erie can forecast shoreline changes in annual and 10-year increments. It was developed by using historical shoreline data of year 1973, 1990, 1994, and 2000 at Lake Erie provided and developed by NOAA, local government agencies and Mapping and GIS lab of the Ohio State University. The relationships among these previous shorelines are analyzed using a Least-Squares method. Erosion rates are then derived from shoreline changes. The research also involves method of acquiring, comparing, analyzing, and presenting historical shoreline positions for the Painesville region of the Lake Erie, Ohio. In this regard, a Geographic Information System (GIS) offers a potential platform to incorporate spatio-temporal characteristics, accuracy improvement, reliability and usefulness of the prediction model.
- By : Jennifer Montano Munoz
Modelling Shoreline Evolution Over Multiple Time-scales
Author: Jennifer Montano Munoz
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
In recent decades, research efforts to understand and predict beach evolution have increased since it is becoming clear that coastal erosion is likely to be exacerbated as a result of the intensification of storms and increased rates of sea level rise. The social and economic implications of changes along the beach are vast, hence the importance of developing predictive models. Despite the development of a variety of models based on different approaches to address shoreline evolution, the predictive capability of these models is still limited by an incomplete understanding of interactions between drivers and responses, and the different spatial and temporal scales at which they act. In general, traditional shoreline models (based on the equilibrium concept), have shown good performance at predicting shoreline changes from seasonal to multi-annual time-scales but still struggle to predict faster changes in the shoreline position. Therefore, a modi cation of one of the most popular shoreline evolution models (Yates et al., 2009) is introduced, showing good performance when predicting time-scales longer than seasonal but also the faster shoreline changes. The model was presented in a competition where 19 numerical models (a mix of established shoreline models and machine learning techniques) were tested at Tairua beach, New Zealand. The results showed that although traditional models and machine learning techniques had a good performance at reproducing the shoreline evolution during the 15 years of calibration, skill decreased during the 3 years of forecast prediction (unseen data). A model ensemble results in better performance than any individual model, accounting for uncertainties in model architecture. The study gave evidence of the difficulty in achieving reliable predictions over both short and long-term shoreline time-scales. For this reason, a new model approach based on the Complete Ensemble Empirical Mode Decom- position method is introduced and tested at two study sites (Narrabeen, Australia and Tairua, New Zealand). The new approach estimates the characteristic oscillations in the shoreline and drivers, allowing to predict the shoreline changes at individual time-scales, identifying the drivers with the largest contribution to shoreline change. Then the total shoreline position is predicted as the sum of all the significant time-scales. The approach is novel also because it uses as model drivers, sea level pressure fields and gradients, in addition to the more traditional bulk wave information. The new model displays better performance when compared to an established shoreline model. This approach bridges the short-term shoreline change driven by waves with longer-term changes driven by large-scale climate oscillations (e.g. El Ni~no Southern Oscillation). Finally, the new model approach was applied to a beach with an entirely different setting, Vougot beach, France. This beach is unique in many aspects: the large tidal range, the presence of o shore rocks, and the frequently observed dune erosion during storm events followed by resilience phases in between stormy winters, making the modelling extremely challenging. The dune/beach interactions were analysed throughout a centroid analysis in which the dominant beach change modes were identified The analysis allows to identify how the sediment contribution resulting from the dune erosion events `resets' the shoreline behavior. As a result, the shoreline oscillations at time-scales related to dune erosion and recovery events account for a large part of the explained variance. This methodology allows improving understanding of beach-dune interactions, and even more generally, prediction horizons at beaches where many processes operate and traditional approaches fail. Overall, the research provides useful insights to understand that in addition to the expected seasonal-annual shoreline changes caused by incident wave variability or long-term changes associated with longshore sediment transport, many other time-scales of change may co-exist and have significant impacts on shoreline evolution and its prediction.
- By :
Savannah Harbor Section 203 Expansion Project, Channel Deepening, Harbor Improvements, Georgia Ports Authority, Federal Navigation Project [GA,SC]
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 1164
Book Description
- By : Joseph Hun-wei Lee
Asian And Pacific Coasts 2011 - Proceedings Of The 6th International Conference
Author: Joseph Hun-wei Lee
Publisher: World Scientific
ISBN: 981439713X
Category : Technology & Engineering
Languages : en
Pages : 2187
Book Description
This is a compilation of papers presented at the 6th International Conference on Asian and Pacific Coasts (APAC2011) held on December 14-16, 2011 in Hong Kong, China. It contains more than 200 articles addressing a wide spectrum of issues, ranging from conventional coastal engineering problems (such as wave hydrodynamics and sediment transport) to issues of contemporary interest (such as tsunami, coastal development, climate change and seawater level rise, shoreline protection, marine energy, nearshore ecology, oil spill, etc.). Authors present their experiences in tackling these problems, by means of theoretical modeling, numerical simulation, laboratory and field observations, with an aim to advance fundamental understanding of the controlling mechanisms, as well as to develop solutions for practical designs. This volume serves to promote technological progress and activities, technical knowledge transfer and cooperation on an international scale.
- By : Jane Mckee Smith
Coastal Engineering 2008 (In 5 Volumes) - Proceedings Of The 31st International Conference
Author: Jane Mckee Smith
Publisher: World Scientific
ISBN: 9814467561
Category : Technology & Engineering
Languages : en
Pages : 5136
Book Description
This proceedings contains papers presented at the 31st International Conference on Coastal Engineering, which has held in Hamburg, Germany (31 August - 5 September 2008). The proceeding is divided into five parts: Waves; Long Waves, Nearshore Currents, and Swash; Sediment Transport and Morphology; Coastal Management, Environment, and Risk; and Coastal Structures. The papers cover a broad range of topics including theory, numerical and physical modeling, field measurements, case studies, design, and management. Coastal Engineering 2008 provides coastal engineers, scientists, and planners, with state-of-the-art information on coastal engineering and coastal processes.
- By : Russ Altman
- Science
Pacific Symposium on Biocomputing 2009, Kohala Coast, Hawaii, USA, 5-9 January 2009
Author: Russ Altman
Publisher: World Scientific
ISBN: 9812836934
Category : Science
Languages : en
Pages : 567
Book Description
The Pacific Symposium on Biocomputing (PSB) 2009 is an international, multidisciplinary conference for the presentation and discussion of current research in the theory and application of computational methods in problems of biological significance. Presentations are rigorously peer reviewed and are published in an archival proceedings volume. PSB 2009 will be held on January 5OCo9, 2009 in Kamuela, Hawaii. Tutorials will be offered prior to the start of the conference. PSB 2009 will bring together top researchers from the US, the Asian Pacific nations, and around the world to exchange research results and address open issues in all aspects of computational biology. It is a forum for the presentation of work in databases, algorithms, interfaces, visualization, modeling, and other computational methods, as applied to biological problems, with emphasis on applications in data-rich areas of molecular biology. The PSB has been designed to be responsive to the need for critical mass in sub-disciplines within biocomputing. For that reason, it is the only meeting whose sessions are defined dynamically each year in response to specific proposals. PSB sessions are organized by leaders of research in biocomputing''s OC hot topics.OCO In this way, the meeting provides an early forum for serious examination of emerging methods and approaches in this rapidly changing field."
- By :
- Aeronautics
Scientific and Technical Aerospace Reports
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 464
Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
- By : A. C. Lietz
- Nutrient pollution of water
Methodology for Estimating Nutrient Loads Discharged from the East Coast Canals to Biscayne Bay, Miami-Dade County, Florida
Author: A. C. Lietz
Publisher:
ISBN:
Category : Nutrient pollution of water
Languages : en
Pages : 46
Book Description
- By : P. Malanotte-Rizzoli
- Science
Modern Approaches to Data Assimilation in Ocean Modeling
Author: P. Malanotte-Rizzoli
Publisher: Elsevier
ISBN: 0080536662
Category : Science
Languages : en
Pages : 469
Book Description
The field of oceanographic data assimilation is now well established. The main area of concern of oceanographic data assimilation is the necessity for systematic model improvement and ocean state estimation. In this respect, the book presents the newest, innovative applications combining the most sophisticated assimilation methods with the most complex ocean circulation models. Ocean prediction has also now emerged as an important area in itself. The book contains reviews of scientific oceanographic issues covering different time and space scales. The application of data assimilation methods can provide significant advances in the understanding of this subject. Also included are the first, recent developments in the forecasting of oceanic flows. Only original articles that have undergone full peer review are presented, to ensure the highest scientific quality. This work provides an excellent coverage of state-of-the-art oceanographic data assimilation.
- By : Alejandro Olivieri
Fundamentals and Applications of Multiway Data Analysis
Author: Alejandro Olivieri
Publisher: Elsevier
ISBN: 0443132623
Category : Technology & Engineering
Languages : en
Pages : 710
Book Description
Fundamentals and Applications of Multiway Data Analysis provides comprehensive coverage of the main aspects of multiway analysis, including selected applications that can resolve complex analytical chemistry problems. This book follows on from Fundamentals and Analytical Applications of Multiway Calibration, (2015) by addressing new theoretical analysis and applications on subjects beyond multiway calibration and devoted to the analysis of multiway data for other purposes. Specifically, this new volume presents researchers a set of effective tools they can use to obtain the maximum information from instrumental data. This book includes the most advanced techniques, methods and algorithms related to multiway modelling for solving calibration and classification tasks, and the way they can be applied. This book collects contributions from a selected number of well-known and active chemometric research groups across the world, each covering one or more subjects where their expertise is recognized and appreciated. Includes chapters written by renowned international authors, all currently active in the subject field Presents coverage of all the main aspects of multi-way analytical data analysis, concerning the two main areas of interest: data generation and algorithmic models for data processing Provides up-to-date material with reference to current literature on the subject
