Area of Operations: Isla de Vieques, Puerto Rico, United States, Caribbean Sea, North America, Noth Atlantic
Dates: November 07, 1977 to November 16, 1977
Chief scientist: Jim Trumbull
Kurt Grove - PR-DNR
Objectives: 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.
Type of Activity: Sea floor mapping; Photography;Sea floor mapping
Information to be derived: Grain size analysis; Suspended sediment concentrations;
Summary: 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.
Contact: Jim Trumbull ()
InfoBank: uses the identifier M-9-77-PR. Visit this site for more information.
Related Links:
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U.S. Department of the Interior |
U.S. Geological Survey