DYNAMIC PROPERTIES OF IMMERSED SAND AT VIRGINIA BEACH, VIRGINIA.
Abstract
On March 25, 1963, 219 sand samples were taken from the shoaling-wave, breaking-wave, swashbackwash, and foreshore zones of the beach. The following 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 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. Data for mean and median grain size (in nominal diameter) and sorting for each sample are presented. For the natural seawater conditions 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 compare poorly with those predicted by Miller and Zeigler's (1958) model. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1964
- Accession Number
- AD0459520
Entities
People
- Reinaldo Morales-alamo
- Wyman Harrison
Organizations
- Virginia Institute of Marine Science