Download or read book Beach Profile and Seawall Interaction During Severe Storm Conditions written by Paul L. Miselis and published by . This book was released on 1994 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Interaction of Seawalls and Beaches written by and published by . This book was released on 1997 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Urban Ocean written by Alan F. Blumberg and published by Cambridge University Press. This book was released on 2018-11 with total page 249 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes the physics of the coastal ocean, for advanced students, researchers, urban planners, and environmental engineers.
Download or read book Coastal Engineering Studies in Support of Virginia Beach Virginia Beach Erosion Control and Hurricane Protection Project written by Martha S. Heimbaugh and published by . This book was released on 1988 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effect of Seawalls on Beach Morphology and Dynamic Processes written by Nathaniel Granger Plant and published by . This book was released on 1990 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sea Level Rise for the Coasts of California Oregon and Washington written by National Research Council and published by National Academies Press. This book was released on 2012-12-06 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tide gauges show that global sea level has risen about 7 inches during the 20th century, and recent satellite data show that the rate of sea-level rise is accelerating. As Earth warms, sea levels are rising mainly because ocean water expands as it warms; and water from melting glaciers and ice sheets is flowing into the ocean. Sea-level rise poses enormous risks to the valuable infrastructure, development, and wetlands that line much of the 1,600 mile shoreline of California, Oregon, and Washington. As those states seek to incorporate projections of sea-level rise into coastal planning, they asked the National Research Council to make independent projections of sea-level rise along their coasts for the years 2030, 2050, and 2100, taking into account regional factors that affect sea level. Sea-Level Rise for the Coasts of California, Oregon, and Washington: Past, Present, and Future explains that sea level along the U.S. west coast is affected by a number of factors. These include: climate patterns such as the El Niño, effects from the melting of modern and ancient ice sheets, and geologic processes, such as plate tectonics. Regional projections for California, Oregon, and Washington show a sharp distinction at Cape Mendocino in northern California. South of that point, sea-level rise is expected to be very close to global projections. However, projections are lower north of Cape Mendocino because the land is being pushed upward as the ocean plate moves under the continental plate along the Cascadia Subduction Zone. However, an earthquake magnitude 8 or larger, which occurs in the region every few hundred to 1,000 years, would cause the land to drop and sea level to suddenly rise.
Download or read book The Effects of Seawalls on Beaches written by James Fulton Tait and published by . This book was released on 1988 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Beach Profile Response Analysis Durng Storm Waves written by Umut Türker and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: All the natural events related with coastal nature can be linked to the existence or the absence of the waves. Especially in winter seasons, an increase in wave height and decrease in wave period grounds erosion of foreshore coastal regions where eroded material accumulate at some distance offshore from the coast forming an offshore bar. The final profile attained is called storm beach profile. Knowledge of the characteristics of a storm beach profile under wave attack is of great importance in a number of coastal engineering problems particularly in coastal erosion problems. The goal of this investigation is development of a physical model to predict the actual location of offshore bar in terms of wave climates and sediment properties of beach profiles. For this purpose, a simple analytical solution based on energy dissipation relation is developed. Based on dynamic equilibrium profile considerations, the energy required for sediment transport due to wave breaking per unit volume, Ds, is expressed in terms of the difference between the actual Dw and equilibrium Deq, levels of wave energy dissipations per unit volume. Ds = Dw -Deq . The solution of the above equation gives information about the average displacement of sediment particles until the dynamic equilibrium is attained, where net sediment transport is accepted as zero.Average displacement of sediment particles is actually represented by the distance between the center of mass of offshore bar and eroded portion. The validity of the above equation is examined using laboratory results under both regular and irregular waves. The experiments are conducted in narrow flumes where the slope of beach profile always kept constant (1 :5). The grain diameters were varying from ü.38 mm to 0. 7 mm. During the experiments the dynamic beach profiles attained at the end were plotted to measure the equilibrium offshore bar volumes and the average displacement of sediment particles. The experimental analyses are than carried out to develop a semi-empirical expression for the description of bar volume and fictive period under regular and irregular waves. During experimental studies it is observed that when the wave height increases the bar formatİon migrates further offshore progressively , increasing the volume until the equilibrium bar volume is attained. This evolutİon, when observed as a macroscale feature, is well govemed by dİmensİonless sand fall speed parameter and the ratio between the sediment size and the wave height. The two maİn features correspondİng to the dislocation of offshore bar, fictive period and equilibrium bar volume is given by the empirical expression govemed by fall speed parameter and the ratio between the sediment size and wave height. The method presented iİs compared with experimental results where root mean square of 4.06% and 6.21 % for regular and irregular waves were respectively achieved. Uıider regular waves the sİgnificant wave height was exhibİting a dominant character for the locatİon of the barred profiles. However, for direct incoming random waves the highest one tenth of wave height was dominating the location of barred profile. Perhaps, the reason for such a variatİon lies in the fact that actually the offshore migration of bars is necessarily associated with break point processes. Thus, under random waves the small amplitude waves even cannot broke to dissipate their energy. The definition of the average sediment displacement gives birth to define the shape factor and transport parameter in terms of both wave climate and sediment characteristics. Therefore, results obtained above are further improved to define constant shape factor and transport rate parameters. Shape factor , used İn linear model applications on equiİlibrium beach profiles was previously represented by grain diameter . The analysis has shown that the factor is proportional with both the wave height and the wave period. Alteration in shape factor was rapid for small grain sizes whereas a smooth change were taking over under coarse-grained beach profiles. The former estimations for transport rate parameter were based on calibrations and thus, there were no stick calculations attained for the measurements. An expression is developed to define the parameter in terms of sediment characteristics and wave climates. The transport rate coefficient primarily govems the time response of beach profile. Smaller value gives longer elapsed time before equilibrium is attained, whereas large value produces more rapid evolution. It is shown that any expand in sediment diameter or wave height proportionally increases the value of the parameter . The former assessment on offshore bar formation was basically derived for beach profiles consisting of specific grain sizes. The effect of grading on beach profile response based on wave energy dissipation phenomena is also examined in laboratory conditions and the results are discussed without any analytical solution. It İs seen that sorting of sand grains takes place and in the course of this process it is observed that coarse sediment moves onshore while finer material simultaneously move offshore. The first material to be deposited from the shoreline was the coarsest, followed seaward by the medium sized grains, with the finest components being placed further offshore over the bar. In considering wave energy dissipation per unit water volume in the surf zone and relating it with the work per unit volume, necessary to displace sediment particles, it is concluded that the effect of grading grounds the formation of offshore bar closer to the shoreline with small volumes.
Download or read book Reducing Coastal Risk on the East and Gulf Coasts written by Committee on U.S. Army Corps of Engineers Water Resources Science, Engineering, and Planning: Coastal Risk Reduction and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hurricane- and coastal-storm-related losses have increased substantially during the past century, largely due to increases in population and development in the most susceptible coastal areas. Climate change poses additional threats to coastal communities from sea level rise and possible increases in strength of the largest hurricanes. Several large cities in the United States have extensive assets at risk to coastal storms, along with countless smaller cities and developed areas. The devastation from Superstorm Sandy has heightened the nation's awareness of these vulnerabilities. What can we do to better prepare for and respond to the increasing risks of loss? Reducing Coastal Risk on the East and Gulf Coasts reviews the coastal risk-reduction strategies and levels of protection that have been used along the United States East and Gulf Coasts to reduce the impacts of coastal flooding associated with storm surges. This report evaluates their effectiveness in terms of economic return, protection of life safety, and minimization of environmental effects. According to this report, the vast majority of the funding for coastal risk-related issues is provided only after a disaster occurs. This report calls for the development of a national vision for coastal risk management that includes a long-term view, regional solutions, and recognition of the full array of economic, social, environmental, and life-safety benefits that come from risk reduction efforts. To support this vision, Reducing Coastal Risk states that a national coastal risk assessment is needed to identify those areas with the greatest risks that are high priorities for risk reduction efforts. The report discusses the implications of expanding the extent and levels of coastal storm surge protection in terms of operation and maintenance costs and the availability of resources. Reducing Coastal Risk recommends that benefit-cost analysis, constrained by acceptable risk criteria and other important environmental and social factors, be used as a framework for evaluating national investments in coastal risk reduction. The recommendations of this report will assist engineers, planners and policy makers at national, regional, state, and local levels to move from a nation that is primarily reactive to coastal disasters to one that invests wisely in coastal risk reduction and builds resilience among coastal communities.
Download or read book Extreme Weather Events Induced Coastal Environment Changes under Multiple Anthropogenic Impacts written by Dehai Song and published by Frontiers Media SA. This book was released on 2023-06-07 with total page 247 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quantification of Beach Profile Change written by Magnus Larson and published by . This book was released on 1988 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: An engineering numerical model is presented for simulating beach profile change in the surf zone produced by wave-induced cross-shore sand transport. It simulates the dynamics of macroscale profile change, such as growth and movement of breakpoint bars and berms. The foundation for development of the numerical model was two large wave tank experiments consisting altogether of 42 cases with different incident wave conditions, median grain size, and initial beach shape. Extensive analysis was made to define and quantify parameters describing profile change and relate these parameters to wave and sand characteristics. The model was developed using transport rate relationships inferred from profile change measured in the large wave tanks. Distributions of the net transport rate were obtained by integrating the sand conservation equation across pairs of profiles separated in time. Semi-empirical transport rate relationships were developed for different regions of the profile. The beach profile change model was calibrated and verified with the prototype-scale laboratory data. It was also applied to simulate field beach profile change measured in five storm events and good agreement was found. Beach profile evolution in the vicinity of a seawall and the adjustment of a beach fill to incident waves were also studied with the model. (edc).
Download or read book Shore and Beach written by and published by . This book was released on 2001 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Shore Beach written by and published by . This book was released on 2002 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Protection Techniques for Storm Damage written by Hyun Dong Kim and published by . This book was released on 2017 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydraulic model tests were conducted in a wave flume to reduce storm induced damage to backshore areas. Because no such methods were available to design structures to reduce the storm damage, four test series: sand beach with a berm, sand beach with a dune, a rock seawall and a sand-covered rock seawall with 14 tests and 140 runs were conducted in the small-scale experiment to compare the effectiveness in reducing storm wave overtopping and sand overwash. Using almost same incident irregular waves, water level was raised to increase the wave overtopping and sand overwash. It was found that the dune was effective to reduce wave overtopping compared to the berm without the dune. However, when the still water level (SWL) was increased, the narrow dune was easily eroded. The stone seawall eliminated the erosion problem of the dune; however, the buried seawall combined the aesthetics of the dune and the robustness of the stone seawall. The stone seawall buried inside the dune functioned like the dune initially and like the seawall after the sand on and inside the porous seawall was eroded by overtopping waves. Both stone seawall and buried stone seawall were deformed but reduced wave overtopping. The existing numerical model, CSHORE is extended to predict sand transport on and inside the porous structure in the swash zone. The hydraulic model tests and the numerical model are compared to evaluate the effectiveness of coastal storm protection techniques.
Download or read book Seawall Design on the Open Coast written by Todd L. Walton and published by . This book was released on 1979 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Urban Ocean written by Alan F. Blumberg and published by Cambridge University Press. This book was released on 2018-10-31 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces the new discipline of urban oceanography, providing a deeper understanding of the physics of the coastal ocean in an urban setting. The authors explore how the coastal ocean impacts with the humans who live, work and play along its shores; and in turn how human activities impact the health and dynamics of the coastal ocean. Fundamental topics covered include: the governing dynamical equations; tidal and circulation processes; variation of salinity and freshwater fluxes; watershed pollutants; observing systems; and climate change. Bridging the gaps between the fields of engineering, physical and social sciences, economics, and policy, this book is for anyone who wishes to learn about the physics, chemistry, and biology of coastal waters. It will support an introductory course on urban oceanography at the advanced undergraduate and graduate level, and will also prove invaluable as a reference text for researchers, professionals, coastal urban planners, and environmental engineers.
