59 resultados para Overpressured Sands
em University of Michigan
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Map on lining-paper.
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Mode of access: Internet.
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Mode of access: Internet.
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"A contract between Amphibious Branch, Office of Naval Research, U. S. Naval Photographic Interpretation Center, Monitor [and] School of Civil Engineering, Cornell University. Beach accessibility and trafficability, project no. NR 257 001, contract N6onr, task order # 11. Petrographic analysis by Francisco J. Cordova. D. J. Belcher, director."
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Mode of access: Internet.
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"August 1978."
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Mode of access: Internet.
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Mode of access: Internet.
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Mode of access: Internet.
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Cover title.
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Plates engraved by George Cooke, Thomas Lord Busby, and either James or Robert Sands.
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Mode of access: Internet.
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"Dedicated to the Hon. Spencer Lyttelton, C.B."
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Mode of access: Internet.
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The development of sand ripples in an oscillatory-flow water tunnel was observed in 104 laboratory experiments approximating conditions at the seabed under steady progressive surface waves. The period, T, and amplitude, a, of the water motion were varied over wide ranges. Three quartz sands were used, with mean grain diameters, D = 0.55, 0.21, and 0.18 millimeter. In 24 experiments, with the bed initially leveled, T was reduced until ripples appeared, and their development to final equilibrium form was observed without further change in T. The remaining 80 experiments investigated the response of previously established bed forms to changes in T or a or both. The ripple length, lambda, and height, eta, were measured from photos, except when bed forms were three dimensional.