03463cam a2200673Ia 4500100961422MiAaHDL20250726000000.0m d cr bn ---auaua781026s1978 vaua b f000 0 eng dCERC-TP-78-5NLGGC059334649GBVCP058704930DTICEADA060907(MiU)990141966200106381sdr-miu.990141966200106381(MiU)MIU01000000000000014196620-goog(OCoLC)227513902(OCoLC)4322253(MiU)Aleph014196620AEDengAEDGPOMTGSYBDTICEOCLCQOCLCFOCLCQOCLCOTRAALn-us---MAINTC203.U581tp no. 78-5334-A-24 (microfiche)D 103.42/10:78-5Lofquist, Karl E. B.Sand ripple growth in an oscillatory-flow water tunnel /by Karl E.B. Lofquist ; prepared for U.S. Army, Corps of Engineers, Coastal Engineering Research Center.Fort Belvoir, Virginia :U.S. Army Coastal Engineering Research Center ;Springfield, Virginia :National Technical Information Service, Operations Division,1978.101 pages :illustrations ;27 cm.texttxtrdacontentunmediatednrdamediavolumencrdacarrierTechnical paper ;no. 78-5"August 1978."Cover title.Includes bibliographical references (pages 83-85).APPROVED FOR PUBLIC RELEASE.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.Mode of access: Internet.Civil Engineering.scgdstPhysical and Dynamic Oceanography.scgdstRipple-marks.fasthttp://id.worldcat.org/fast/1098107Coast changes.fasthttp://id.worldcat.org/fast/865699Water tunnels.dtictBeaches.dtictOscillation.dtictTransport properties.dtictGrain size.dtictCoastal regions.dtictLaboratory tests.dtictBeach erosion.dtictRipples.dtictSand.dtictOcean waves.dtictCoast changesUnited States.Ripple-marks.http://id.loc.gov/authorities/subjects/sh85114183United States.fasthttp://id.worldcat.org/fast/1204155LPN-DA-D-31193Coastal Engineering Research Center (U.S.)http://id.loc.gov/authorities/names/n81117290http://id.loc.gov/rwo/agents/n81117290Technical Report Archive & Image Library (TRAIL)3901509503122810096142220241218023116.020250726000000.020260304165331.02026-03-05T10:38:20Z2024-06-26T17:30:02ZSDR-MIUmiuALMAprepare.pl-004-009BKsdr-miu.990141966200106381MiUSDRGWLA014196620mdp.39015095031228MIU990141966200106381MIUGWLA20260305googlemdp.390150950312281978pdbibUS fed doc--NTIS: pubdate < 2020