Download or read book Wave basin Study of Runup on Beaches from Simulated Underwater Explosions Near Shore written by D. B. Jones and published by . This book was released on 1968 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: Laboratory data are presented for the runup on a uniform slope of the leading waves of an axially symmetric, dispersive train of surface gravity waves. The waves emanated from an impulsive disturbance, simulating an underwater explosion. A significant aspect of the test conditions was the limited dispersion of the wave train, resulting from the relatively short propagation distance and the relatively large area covered by the wave-generating disturbance. Two general classes of wave trains were studied, distinguished by an initial rise of the water surface (a crest at the front of the wave train) in one case and an initial fall (trough) in the other. In both cases, the first wave in the wave train produced the greatest runup. The dominance of the first wave was more marked in the larger disturbances (higher waves). The more important leading-crest case simulated an explosion of the shallow-water type. This type is expected from explosions of large but not unrealistic magnitude in relatively shallow coastal waters. On a 1:14 slope, the leading crest did not break and the ratio of runup to wave height was constant (3.3) for ratios of wave height to water depth at the toe of the slope (H/d sub o) varying from 0.003 to 0.073. On a 1:20 slope, the leading crest broke with H/d sub o greater than 0.035; the runup of nonbreaking leading crests was 5% to 25% less than on the 1:14 slope, and breaking decreased the runup still further. (Author).
Download or read book Measurements of Runup on Seawalls of Waves from Simulated Underwater Explosions Near Shore written by D. B. Jones and published by . This book was released on 1969 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: Laboratory data are presented for the runup on plane-faced seawalls of the leading waves from impulsive disturbances simulating underwater explosions. The tests covered walls with faces vertical and sloping 4:1 and 2:1 from horizontal, with foreshore slopes of 1:14 and 1:20. The tests covered two general classes of wave trains--specifically, trains with a leading trough (as produced by explosions in relatively deep water) and trains with a leading crest (as produced by explosions in relatively shallow water). The more important data pertain to the latter class, since significantly large explosions not far from shore are of the shallow-water type. A noteworthy aspect of the tests was the limited dispersion of the wave trains, resulting from the relatively short propagation distance and the large radius of the area covered by the disturbance, relative to the depth. (Author).
Download or read book Run up by Impulsively Generated Water Waves written by Jan M. Jordaan and published by . This book was released on 1964 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt: Theoretical and experimental studies were conducted to determine the run-up on a plane beach produced by systems of impulsive generation. The facility used for the studies consists of a wave basin which simulates the run-up of actual ocean waves on beaches. Wave trains were generated by bobbing the plunger up and down pneumatically in a single stroke or in arbitrary sequences chosen to produce wave trains simulating these produced by underwater or surface explosions. The para boloidal shape of the plunger was chosen because it resembles the crater produced by an underwater explosion. The wave trains were recorded at several distances from the center of plunger, and the corresponding run-up on test beach units of 1:15 slope was recorded. Theoretical results were derived and compared with the observed results. The extent of agreement between theory and experiment is discussed, and preliminary conclusions are that an adequate theory exists to predict wave generation due to underwater highexplosive blasts. (Author).
Download or read book NBS Special Publication written by and published by . This book was released on 1971 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Current Hydraulic Laboratory Research in the United States written by and published by . This book was released on 1970 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydraulic Research in the United States 1970 written by United States. National Bureau of Standards and published by . This book was released on 1971 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydraulic Research in the United States and Canada written by United States. National Bureau of Standards and published by . This book was released on 1968 with total page 1046 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report written by United States. National Bureau of Standards and published by . This book was released on 1968 with total page 696 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydraulic Structure Equipment and Water Data Acquisition Systems Volume II written by Jan Malan Jordaan and published by EOLSS Publications. This book was released on 2009-11-25 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydraulic Structure, Equipment and Water Data Acquisition Systems is a component of Encyclopedia of Water Sciences, Engineering and Technology Resources in the global Encyclopedia of Life Support Systems (EOLSS), which is an integrated compendium of twenty one Encyclopedias. Hydraulic structures occupied a vital role in the development of civilization from the earliest recorded history up to the present, and undoubtedly will do so in the future. Humanity in ancient times settled mostly near perennial rivers, nomadic people frequented oases and springs, and to augment these natural ephemeral supplies, established societies built primitive dams and dug wells. This 4-volume set contains several chapters, each of size 5000-30000 words, with perspectives, applications and extensive illustrations. It carries state-of-the-art knowledge in the fields of Hydraulic Structure, Equipment and Water Data Acquisition Systems. In these volumes the historical origins, modern developments, and future perspectives in the field of water supply engineering are discussed. Various types of hydraulic structures, their associated equipment, and the various systems for collecting data are described. These four volumes are aimed at the following five major target audiences: University and College Students Educators, Professional Practitioners, Research Personnel and Policy Analysts, Managers, and Decision Makers, NGOs and GOs.
Download or read book Handbook of Explosion generated Water Waves written by William G. Van Dorn and published by . This book was released on 1968 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Feasibility of Modeling Run up Effects of Dispersive Water Waves written by J. M. Jordaan and published by . This book was released on 1965 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Studied were made in a laboratory test basin to determine the feasibility of modeling run-up effects of explosively generated water waves on beach and waterfront structures. Results were compared with (i) analytically derived predictions, and (ii) wave measurements (but not run-up) made in the ocean with high-energy (HE) explosives as the generating source. The test basin is 92 feet by 94 feet in size with 1:5, 1:13.6 and 1:5 sand beaches on three sides and on the fourth a 14-foot-diameter semi-paraboloidal plunger which by sudden plunge or retraction generates dispersive waves with dominant period of 2 seconds, height of 0.2 feet, and length of 20 feet in water 2-1/2 feet deep. It was found that wave motions are (i) predicted well by Green's Law, as modified for dispersive waves; and (ii) related to waves generated in the ocean by HE by the Froude scaling law. (Author).
Download or read book U S Government Research Development Reports written by and published by . This book was released on 1969 with total page 796 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 1973 with total page 708 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Marine Technology Society Journal written by and published by . This book was released on 1969 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Report written by and published by . This book was released on 1966 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Government Research and Development Reports Index written by and published by . This book was released on 1969 with total page 1012 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laboratory Simulation of Waves Generated by Underwater Nuclear Explosions written by J. M. Jordaan and published by . This book was released on 1966 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: The kinematics of surface gravity waves produced in water 2.5 feet deep in a basin 90 feet square by a sudden, localized disturbance was studied through measurements of height and period. The waves were generated by the quick withdrawal or immersion, or combinations of these actions, of a 14-foot-diameter half-paraboloid plunger located near the mid-point of one wall of the basin. Smaller plungers of diverse shapes were also used. Measurements were made both in the constant-depth portion of the basin and over a beach with a uniform slope of 1:13.6, which was directly opposite the plunger. At the shoreline about 80 feet from the plunger, waves produced by a sudden withdrawal, for example, were 3 inches high, with a maximum period of 3 seconds. The waves compare adequately with those predicted by the theory of Kranzer and Keller, although they were 40% smaller and 20% shorter. By extrapolation, it was found that waves were produced which adequately simulated those from the actual underwater detonation of a high-energy explosive (5 tons TNT) and a nuclear device (20 kt equivalent). It is concluded that with proper scaling the plunger can be used to simulate waves from such causes. (Author).
