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QUANTITATIVE ANALYSIS OF BEACH SAND MOVEMENT, VIRGINIA BEACH, VIRGINIA 1
Author(s) -
BOON JOHN D.
Publication year - 1969
Publication title -
sedimentology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.494
H-Index - 108
eISSN - 1365-3091
pISSN - 0037-0746
DOI - 10.1111/j.1365-3091.1969.tb01122.x
Subject(s) - swash , geology , longshore drift , shore , submarine pipeline , geomorphology , surf zone , hydrology (agriculture) , tracer , sampling (signal processing) , sediment , sediment transport , geotechnical engineering , geodesy , oceanography , physics , nuclear physics , filter (signal processing) , computer science , computer vision
SUMMARY A simplified stochastic‐process model involving statistical procedures is used to analyze sand tracer displacement data on an ocean beach. The procedures provide meaningful estimates of the direction and magnitude of the movement of beach sand through set intervals of time. Results of a single tracer experiment are reported for a beach located near Virginia Beach, Virginia. Using a rectangular sampling grid, tracers were recovered at fixed times, then considered as items in a sample of X and Y displacements from the point of release. Comparison of the adjusted means of these samples on a time‐ stratified basis gave estimates of average particle velocity in two dynamic zones: (1) swash zone: v̄(X) = 0.44 ft./min (0.22 cm/sec) longshore; (2) surf zone: v̄(Y)= 0.37 ft./min (0.19 cm/sec) offshore. Using an estimate of the thickness of the mobile layer (the depth interval in which semi‐continuous motion of beach sand occurs), a further estimate of the rate of longshore sand transport was computed at 440 yards 3 /day (336 m 3 /day).