Download or read book Modelling Shoreline Evolution Over Multiple Time scales written by Jennifer Montano Munoz and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Mathematical Modeling of Shoreline Evolution written by Bernard LeMéhauté and published by . This book was released on 1977 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: A critical literature survey on mathematical modeling of shoreline evolution is presented. The emphasis is on long-term evolution rather than seasonal or evolution taking place during a storm. The one-line theory of Pelnard-Considere (1956) is developed along with a number of applications. Refinements to the theory are introduced by considering changes of beach slope, wave diffraction effects, wave variation, and variation of sea level. The case of hooked bays is also reviewed. It is concluded that a finite-difference mathematical scheme could be developed for engineering purposes for a small wave angle. For the large wave angle, shoreline instability does not permit use of a reliable mathematical model at this time. (Author).
Download or read book Coastal environment in a changing world written by and published by Frontiers Media SA. This book was released on 2023-06-08 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Landform Dynamics and Evolution in Romania written by Maria Radoane and published by Springer. This book was released on 2016-09-01 with total page 860 pages. Available in PDF, EPUB and Kindle. Book excerpt: New and innovative scientific theories, discussion and explanations are presented on landform dynamics and evolution in Romania along with a comprehensive understanding of the geomorphological processes shaping the large variety of Romania’s landscape. Thematically arranged the book deals with landform dynamics of specific relief types: glacial and periglacial, denudational, fluvio-denudational, fluvial, karst and coasts, as well as sediment fluxes, geomorphic hazards and risks. The authors are key scientists and researchers in the field and offer innovative views on research methods and concepts applied to the topics in question. This work will be of interest to students and researchers in geography, geomorphology, geology, environmental science, paleoclimatology and soil science as well as policy and decision-makers in spatial planning.
Download or read book Sandy Beach Morphodynamics written by Derek Jackson and published by Elsevier. This book was released on 2020-06-03 with total page 814 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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
Download or read book Advances in Coastal Modeling written by V.C. Lakhan and published by Elsevier. This book was released on 2003-10-24 with total page 614 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book unifies and enhances the accessibility of contemporary scholarly research on advances in coastal modeling. A comprehensive spectrum of innovative models addresses the wide diversity and multifaceted aspects of coastal research on the complex natural processes, dynamics, interactions and responses of the coastal supersystem and its associated subsystems. The twenty-one chapters, contributed by internationally recognized coastal experts from fourteen countries, provide invaluable insights on the recent advances and present state-of-the-art knowledge on coastal models which are essential for not only illuminating the governing coastal process and various characteristics, but also for understanding and predicting the dynamics at work in the coastal system. One of the unique strengths of the book is the impressive and encompassing presentation of current functional and operational coastal models for all those concerned with and interested in the modeling of seas, oceans and coasts. In addition to chapters modeling the dynamic natural processes of waves, currents, circulatory flows and sediment transport there are also chapters that focus on the modeling of beaches, shorelines, tidal basins and shore platforms. The substantial scope of the book is further strengthened with chapters concentrating on the effects of coastal structures on nearshore flows, coastal water quality, coastal pollution, coastal ecological modeling, statistical data modeling, and coupling of coastal models with geographical information systems.
Download or read book Mathematical Models written by Jean-Michel Tanguy and published by John Wiley & Sons. This book was released on 2012-12-27 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: This series of five volumes proposes an integrated description of physical processes modeling used by scientific disciplines from meteorology to coastal morphodynamics. Volume 1 describes the physical processes and identifies the main measurement devices used to measure the main parameters that are indispensable to implement all these simulation tools. Volume 2 presents the different theories in an integrated approach: mathematical models as well as conceptual models, used by all disciplines to represent these processes. Volume 3 identifies the main numerical methods used in all these scientific fields to translate mathematical models into numerical tools. Volume 4 is composed of a series of case studies, dedicated to practical applications of these tools in engineering problems. To complete this presentation, volume 5 identifies and describes the modeling software in each discipline.
Download or read book Innovations in Coastal Erosion Risk Assessment and Mitigation written by Giuseppe Barbaro and published by Frontiers Media SA. This book was released on 2022-11-23 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings Of The Coastal Sediments 2023 The In 5 Volumes written by Ping Wang and published by World Scientific. This book was released on 2023-03-24 with total page 2986 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Proceedings contains about 270 papers on a wide range of research topics on coastal sediment processes, including nearshore sediment transport and modeling, beach processes, shore protection and coastal managements, and coastal resilience building.The unique book provides a comprehensive documentation of cutting-edge research on coastal sediment process and morphodynamics from eminent researchers worldwide. Readers can learn the most current knowledge on numerous topics concerning coastal sediment processes and shore protection.
Download or read book Morphodynamic Model for Predicting Beach Changes Based on Bagnold s Concept and Its Applications written by Takaaki Uda and published by BoD – Books on Demand. This book was released on 2018-12-19 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors have developed models for predicting beach changes applicable to various problems on real coasts. One of them is the contour-line-change model to predict long-term beach changes caused by the imbalance in longshore sand transport, which is a kind of N-line model. Because the calculation of the nearshore current is not needed in this model, and the computational load is small, it has an advantage in the prediction of long-term topographic changes on an extensive coast. However, the handling of boundary conditions becomes difficult when offshore coastal structures are constructed in a complicated manner, and in this regard the so-called 3D model has an advantage. Taking this point into account, the authors developed a morphodynamic model (BG model) by applying the concept of the equilibrium slope and the energetics approach, in which depth changes on 2D horizontal grids are calculated.
Download or read book Coastal Sediments 2019 Proceedings Of The 9th International Conference written by Ping Wang and published by World Scientific. This book was released on 2019-05-17 with total page 3050 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Proceedings contains over 260 papers on cutting-edge research presented at the 9th International Conference on Coastal Sediments 2019 (CS19), held in Tampa/St. Petersburg, Florida, USA from May 27-31, 2019. This technical specialty conference is devoted to promoting an interdisciplinary exchange of state-of-the-art knowledge among researchers in the fields of coastal engineering, geology, oceanography, and related disciplines.With the theme of 'Advancing Science & Engineering for Resilient Coastal Systems', this Proceedings covers a wide range of research topics on coastal sediment processes from nearshore sediment transport and modelling to beach processes, shore protection, and coastal management.
Download or read book Coastal Engineering 2004 Proceedings Of The 29th International Conference In 4 Vols written by Jane Mckee Smith and published by World Scientific. This book was released on 2005-04-08 with total page 4836 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive and up-to-date volume contains 367 papers presented at the 29th International Conference on Coastal Engineering, held in Lisbon, Portugal, 19-24 September 2004. It is divided into five parts: waves; long waves, nearshore currents, and swash; sediment transport and morphology; coastal management, beach nourishment, and dredging; coastal structures. The contributions cover a broad range of topics including theory, numerical and physical modeling, field measurements, case studies, design, and management. Coastal Engineering 2004 provides engineers, scientists, and planners state-of-the-art information on coastal engineering and coastal processes.The proceedings have been selected for coverage in:
Download or read book Risk and Reliability written by Dominic Reeve and published by CRC Press. This book was released on 2014-04-21 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: Risk and Reliability: Coastal and Hydraulic Engineering sets out the methods which are increasingly being required by Government Agencies for river and sea defence design and flood defence system management. And it shows how to describe uncertainty in the performance of flood and erosion defences.It introduces the key statistical concepts required
Download or read book Flooding on Coral Reef lined Coasts Current State of Knowledge and Future Challenges written by Curt D. Storlazzi and published by Frontiers Media SA. This book was released on 2021-02-11 with total page 127 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 Recent Advances in Models of Siliciclastic Shallow marine Stratigraphy written by Gary J. Hampson and published by SEPM Soc for Sed Geology. This book was released on 2008 with total page 493 pages. Available in PDF, EPUB and Kindle. Book excerpt: Siliciclastic shallow-marine deposits record the interface between land and sea, and its response to a variety of forcing mechanisms: physical process regime, the internal dynamics of coastal and shelfal depositional systems, relative sea level, sediment flux, tectonic setting, and climate. These deposits have long been the subject of conceptual stratigraphic models that seek to explain the interplay between these various forcing mechanisms, and their preservation in the stratigraphic record. This volume arose from an SEPM research conference on shoreline-shelf stratigraphy that was held in Grand Junction, Colorado, on August 24-28, 2004. The aim of the resulting volume is to highlight the development over the last 15 years of the stratigraphic concepts and models that are used to interpret siliciclastic marginal-marine, shallow-marine, and shelf deposits.
Download or read book River Coastal and Estuarine Morphodynamics RCEM 2007 Two Volume Set written by C. Marjolein Dohmen-Janssen and published by CRC Press. This book was released on 2019-08-22 with total page 1271 pages. Available in PDF, EPUB and Kindle. Book excerpt: Around the world, many people live, work and recreate in river, estuarine and coastal areas, systems which are also important wildlife habitats. It is imperative to understand the physics of such systems. A key element here is morphodynamics: the mutual interaction and adjustment of landform topography and fluid dynamics involving the motion of sed
