Geometry of profiles across Inner Continental Shelves of the Atlantic and Gulf coasts of the United States /

Along most of the U.S. east and gulf coasts from Long Island to the Mexican Border, bottom profiles extending over the Inner Continental Shelves normal from the coast display a characteristic two-sector shape. Near the coast, the 'shoreface' profile sector is steep and concave-up; the seaward 'ramp' sector is planar with a gradual slope away from the coast. As part of the Beach Evaluation Program at this Center, 9 profiles extending from the coast 30.5 km (19 miles) seaward at each of 49 localities were averaged to mathematically characterize the profiles and to develop and test criteria for discriminating among groups of profiles. Results indicate Inner Continental Shelf profiles can be mathematically defined by 4 parameters: a = ramp slope (0 - 0.00107); b = depth of the ramp at the shoreline, when the ramp is extended as a straight line below the shoreface sector (0 - 24.7 meters, 0 - 81 feet); c = distance from the shoreline to the shoreface-ramp boundary (0.2 - 20.6 km, 0.12 - 12.9 miles); and f = index of concavity of the shoreface sector (0.21 - 1.72). Values in parentheses are the range of values obtained for the 49 averaged profiles. An equation was developed to define bottom depth as a function of distance from shore incorporating these four parameters. Computed depths using the equation were found to be generally within 5% of actual profile depths. In most cases, no relationship was found between the geometric characteristics of the shoreface and the ramp.

Sand ripple growth in an oscillatory-flow water tunnel /

The development of sand ripples in an oscillatory-flow water tunnel was observed in 104 laboratory experiments approximating conditions at the seabed under steady progressive surface waves. The period, T, and amplitude, a, of the water motion were varied over wide ranges. Three quartz sands were used, with mean grain diameters, D = 0.55, 0.21, and 0.18 millimeter. In 24 experiments, with the bed initially leveled, T was reduced until ripples appeared, and their development to final equilibrium form was observed without further change in T. The remaining 80 experiments investigated the response of previously established bed forms to changes in T or a or both. The ripple length, lambda, and height, eta, were measured from photos, except when bed forms were three dimensional.

Relation between immersed weight and volume rates of longshore transport /

As presently used, the immersed weight rate, I sub l, is the volume rate, Q, of longshore transport, multiplied by a constant. For use in engineering problems, I sub l must be converted back to the equivalent Q. The I sub l formulation may be important where the unit weight of sand differs significantly from the unit weight of sand at the open-coast sites contributing data to the design curve. Increase in void ratio may result in a 10- to 20-percent increase in actual (as compared to predicted) shoaling volumes where sand accumulates in protected water. Void ratio should be measured in field studies of longshore transport.

Sediments, shallow subbottom structure, and sand resources of the inner continental shelf, central Delmarva Peninsula /

"June 1979."

Estimating nearshore conditions for irregular waves /

"June 1980."

There lived a wicked dragon : an environmental coloring book for children and adults /

Presents children in grade 1 through 3 with information about environmental dangers and ecology.

The transparency by black and white Secchi disc of the waters of New York and Newport Bights : Cruise STIRNI I, July-September 1951 /

Caption title.

The distribution of oxygen in the waters of New York Bight, Block Island Sound, and Newport Bight : Cruise STIRNI I, July-September, 1951 /

Caption title.

Energy research abstracts.

Title from cover.

CDC bulletin

Issues for 1950-51 called v. 9-10

Correlation index of technical reports; AD-PB reports.

Mode of access: Internet.

Index of limited documents releasable to DTIC users

Description based on: Feb. 1984; title from cover.

Climatological data for Arctic stations, July 1957-December 1958.

Mode of access: Internet.

The distribution of salinity in New York Harbor and its approaches /

"Status report no. 12, Contract N6 onr-264, Task 15, Cornell University, December 1951"-leaf [1].

The distribution of temperature in the waters of Long Island Sound, Block Island Sound, and Newport Bight : Cruise STIRNI-III, January-February, 1952 /

Caption title.