Download or read book Observations of Laboratory Rip Currents written by Brian Keith Sapp and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Laboratory experiments of rip current systems are performed in a wave basin with a bar and rip channel geometry at the Ocean Engineering Laboratory at the University of Delaware. The experiments include both in situ water level and velocity measurements and optical visualization of the flow field under a variety of normal-incident wave conditions. Digital video is used to record surface drifters moving through a rip current system. A method is presented that tracks these digitally-recorded drifters into long Lagrangian sequences. The laboratory measurements capture both an Eulerian and Lagrangian description of the rip current system. Time-averaged rip current properties are calculated and analyzed using both in situ and video measurements. From the video, Lagrangian velocities are computed with forward differencing of the low-pass filtered drifter tracks. Wave properties are also estimated using the orbital drifter motions and linear (Airy) wave theory. The effects of various wave conditions on the time-averaged rip current systems are investigated to show that wave height is a critical parameter. Measurements of circulation cells are obtained by spatially averaging the drifter track velocity measurements into a polar grid ranging from 0.25 m to 3.25 m from the center of the cell. Circulation cell features, such as the center of circulation and cell width, are calculated to characterize their response to various wave conditions. Spectral analyses are used to characterize the rip current pulsations in the experimental measurements. Three frequencies are found to be energetic in several of the experiments in the low frequency band: the wave group frequency, a lower frequency, and the interaction of the wave group and lower frequencies. Some experiments have significant energy at each of the three peaks, where others have only one or none. The lower frequency motions have also been found in the video measurements and attributed to rip meandering. Possible causes for the low-frequency pulsations, including wave basin seiching, circulation cell instabilities, and wave-current interaction, are discussed. This thesis adds to previous rip current studies by providing a spatially-large and time-varying perspective of rip current systems as a whole.
Download or read book Rip Currents written by Stephen Leatherman and published by CRC Press. This book was released on 2011-05-09 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rip Currents: Beach Safety, Physical Oceanography, and Wave Modeling is the culmination of research from over 100 coastal scientists, engineers, forecast meteorologists, lifeguard chiefs, and other practitioners from around the world who participated in the 1st International Rip Current Symposium. These experts identify advancements in research tha
Download or read book Longshore Current Velocity written by Cyril Jerome Galvin and published by . This book was released on 1967 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Miscellaneous Report Coastal Engineering Research Center written by Coastal Engineering Research Center (U.S.) and published by . This book was released on 1976 with total page 754 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rip Currents written by Anthony John Bowen and published by . This book was released on 1967 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measuring Ocean Currents written by Antony Joseph and published by Newnes. This book was released on 2013-08-12 with total page 447 pages. Available in PDF, EPUB and Kindle. Book excerpt: Measuring Ocean Currents: Tools, Technologies, and Data covers all major aspects of ocean current measurements in view of the implications of ocean currents on changing climate, increasing pollution levels, and offshore engineering activities. Although more than 70% of the Earth is covered by ocean, there is limited information on the countless fine- to large-scale water motions taking place within them. This book fills that information gap as the first work that summarizes the state-of-the-art methods and instruments used for surface, subsurface, and abyssal ocean current measurements. Readers of this book will find a wealth of information on Lagrangian measurements, horizontal mapping, imaging, Eulerian measurements, and vertical profiling techniques. In addition, the book describes modern technologies for remote measurement of ocean currents and their signatures, including HF Doppler radar systems, satellite-borne sensors, ocean acoustic tomography, and more. Crucial aspects of ocean currents are described in detail as well, including dispersion of effluents discharged into the sea and transport of beneficial materials—as well as environmentally hazardous materials—from one region to another. The book highlights several important practical applications, showing how measurements relate to climate change and pollution levels, how they affect coastal and offshore engineering activities, and how they can aid in tsunami detection. Coverage of measurement, mapping and profiling techniques Descriptions of technologies for remote measurement of ocean currents and their signatures Reviews crucial aspects of ocean currents, including special emphasis on the planet-spanning thermohaline circulation, known as the ocean's "conveyor belt," and its crucial role in climate change
Download or read book Field Observations of Rip Currents written by James H. MacMahan and published by . This book was released on 2003 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Miscellaneous Report written by Coastal Engineering Research Center (U.S.) and published by . This book was released on 1976 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Collected Reprints Atmospheric Physics and Chemistry Laboratory written by Atmospheric Physics and Chemistry Laboratory and published by . This book was released on 1977 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1979 with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reprint written by Coastal Engineering Research Center (U.S.) and published by . This book was released on 1967 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Pharmacist at Work written by William Charles Alpers and published by . This book was released on 2010-09 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Sea Ideas and Observations on Progress in the Study of the Seas written by and published by . This book was released on 1963 with total page 1012 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physical modelling in coastal engineering written by R.A. Dalrymple and published by Routledge. This book was released on 2018-12-19 with total page 285 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coastal engineering is a field which has grown in importance over the last forty years as mankind has utilised and become dependent on the coastlines of the world to a greater extent. The activities in the field include the study of wave dynamics, shoreline erosion and protection, harbor and breakwater design, dredging technology, estuary mechanics and storm surge calculations, as well as offshore structural design. In all of these areas the level of actvity is high and the state of art has imporved dramatically since the 1940's. An important aspect of all these areas of research is the use of model studies. This volume consists of a number of papers which cover various aspects of physical modelling in coastal engineering, including the generation of waves in the laboratory, the modelling of sediment transport and the application to various engineering problems. The intent is to provide the reader with an overview of the research actvities of indviduals who represent major laboratories in their countries: to include Denmark, Scotland, Canada, the People's Republic of China, England, the Netherlands and the U.S.
Download or read book Coastal estuarine and Nearshore Processes written by Evelyn Sinha and published by . This book was released on 1974 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Encyclopedia of Geomorphology written by Andrew Goudie and published by Psychology Press. This book was released on 2004 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first such reference work in thirty-five years, this is a comprehensive guide to both specific landforms and the major types of processes that create them. This two-volume set provides a historical overview of the field, while exploring recent key discoveries about tectonic and climatic changes as well as the use of new techniques such as modeling, remote sensing, and process measurement. Written by a team of expert contributors from over thirty countries, the nearly 700 alphabetically arranged entries are cross-referenced, indexed, and include up-to-date suggestions for further reading. Fully illustrated with over 360 tables and illustrations, this will be the definitive reference source for students, researchers, and practitioners in geomorphology as well as geography, earth science, sedimentology, and environmental science.
Download or read book Annual Summary of Investigations in Support of the Civil Works Program written by Waterways Experiment Station (U.S.) and published by . This book was released on 1966 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
