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Title: Dynamic properties of immersed sand at Virginia Beach, Virginia
Authors: Harrison, Wyman, 1931-
Morales-Alamo, Reinaldo.
Keywords: Sand--Virginia--Virginia Beach
Beaches--Virginia--Virginia Beach
Publisher: Coastal Engineering Research Center (U.S.)
Series/Report no.: Technical memorandum;no. 9
Abstract: Abstract: On March 25, 1963, 219 sand samples were taken from the shoaling-wave, breaking-wave, swash-backwash, and foreshore zones of the beach. The following kinds of measurements were used to describe the properties of the samples: mean settling velocity in nature (as determined with a Woods Hole Rapid Sand Analyzer and a special set of curves for settling velocity as (1) a function of temperature), mean Reynolds number (in nature), and mean drag coefficient (for an infinite fluid under natural conditions). Corey's (1949) shape factor and the Dynamic Shape Factor of Briggs, et al. (1962) were calculated and compared; the Corey shape factor was used in calculating mean settling velocity. Also presented are data for mean and median grain size (in nominal diameter) and sorting for each sample. Forthe natural sea-water conditions (T = 6.9°C, S = 26.7 o/oo), average Reynolds numbers for the various zones were 4.8 (shoaling-wave), 8.1 (breaking-wave), 6.2 (swash-backwash) and 12.0 (swash-berm). The important effect of kinematic viscosity on the dynamic properties of the particles and on beach slopes in the shoaling wave zone is considered. Observed trends of mean size and sorting throughout the dynamic zones are compared with those predicted by Miller and Zeigler's (1958) model and the comparison is found to be rather poor.
Description: Technical Memorandum
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Technical Memorandum

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