Other ID: 77-09
Organization(s): USGS, Woods Hole Coastal and Marine Science Center
Location: Isla de Vieques, Puerto Rico, United States, Caribbean Sea, North America, Noth Atlantic;
Principal Investigator(s): James V. A. Trumbull
Affiliate Investigator(s): Kurt Grove - PR-DNR
Data Type(s): Sonar: Single Beam, Sampling: Biology, Sampling: Chemistry, Sampling: Geology, Environmental Data: Tide
Scientific Purpose/Goals: Investigate sand waves on pipeline route, Escollo de Arenas, northwest of Isla de Vieques, Puerto Rico. Map and measure sand waves; sample; set stakes to detect motion/sediment transport; photograph and observe sand waves by SCUBA; measure tide heights; and sample water on different tides to measure suspended sediment.
Start Date: 1977-11-07
Start Port/Location: Isla de Vieques, Puerto Rico
End Date: 1977-11-16
End Port/Location: Isla de Vieques, Puerto Rico
Equipment Used: Echosounder, SCUBA, Water sampler, Tide gauge
Information to be Derived: Grain size analysis; Suspended sediment concentrations;
Summary of Activity and Data Gathered: Profiled, described and sampled shifting sand shoal, particularly 4 sand waves in central part, on pipeline route. Determined coarse sand is in oscillatory motion on each semi-diurnal tidal current; secondary 2-m waves are in motion. Sampled water on excurrent and incurrent tides for suspended sediment. Recorded rise and fall of tides. Ship days: 5; Man days: 25.
Staff: James V. A. Trumbull
Notes: Platform is a 19-foot center-console outboard, trailered/ferried to Vieques; crew lived ashore at Naval Base. Original Center People field contained: James Trumbull - co-Ch. Sci.; Gary Prisby - Woods Hole.
Grove, K.A., and Trumbull, James V. A., 1978, Surficial geologic maps and data on three potential offshore sand sources on the insular shelf of Puerto Rico: .