Accession Number : AD0608900
Title : USE OF FLUORESCENT TRACERS TO DETERMINE FORESHORE SEDIMENT TRANSPORT, SANDY HOOK, NEW JERSEY.
Descriptive Note : Technical rept. no. 6,
Corporate Author : COLUMBIA UNIV NEW YORK
Personal Author(s) : Yasso,Warren E.
Report Date : 1964
Pagination or Media Count : 24
Abstract : Each of four size classes of foreshore sand from Sandy Hook, New Jersey, was color coded with daylight and ultraviolet fluorescent coating material. These tracer particles were introduced at mid-swash line on the foreshore surface at Kingmill Beach, Sandy Hook, two hours prior to high tide. During the test Atlantic Ocean waves approaching at an angle of approximately 5 degrees to the shoreline caused 5.3-second breakers of 2.4-foot maximum height. A sampling line transverse to the foreshore was established 100 feet downdrift from the point of introduction. In a time-integration procedure samples were obtained by scraping a 0.10-foot deep and 0.18-foot wide channel a distance of 10 feet upslope from the backwash limit. Sub-samples of the 18 samples taken during the 69.7 minutes after marked particle introduction were examined for tracer particle content. Recovery data indicate particles in the smallest size class (0.701>d>0.589 mm) began arriving at sampling line 38.9 minutes after introduction: equivalent to 2.6 ft/min maximum transport velocity. Particles in the next largest size class began arriving 50.0 minutes after introduction: equivalent to 2.0 ft/min maximum transport velocity. However, a maximum number of marked particles in both size classes was found in a sample taken 62.3 minutes after introduction.
Descriptors : (*BEACHES, SEDIMENTATION), (*SEDIMENTATION, BEACHES), (*TRACER STUDIES, SEDIMENTATION), LABELED SUBSTANCES, FLUORESCENCE, SAND, OCEAN WAVES, TIDES, VELOCITY, PARTICLES, PARTICLE SIZE, EROSION, COATINGS, ATLANTIC OCEAN, NEW JERSEY
Distribution Statement : APPROVED FOR PUBLIC RELEASE