Beach and inlet changes at Ludlam Beach, New Jersey /

"May 1980."

Beach changes at Holden Beach, North Carolina, 1970-74 /

Beach profile lines at 21 near-evenly spaced intervals along Holden Beach, North Carolina, between Lockwoods Folly and Shallotte Inlets, were measured from November 1970 to December 1974. These have been analyzed to determine the spatial and temporal variabilities on long-term, seasonal, and short-term scales. Profile lines near the inlets showed the greatest variability in mean sea level (MSL) position, above MSL volume, foreshore slope, and profile envelope. This variability near Lockwoods Folly Inlet was partly enhanced by artificial nourishment at profile line 2. Temporary, low-cost shore protection devices (e.g., sandbag groins) were constructed near that inlet during part of the study. No other modifications or activities that affected beach processes were known to occur during the study period. The central part of Holden Beach was studied separately because of the high variability of the inlet sections at either end of the island. Foreshore slopes along this reach increased from an average of 1:30 at the east end to 1:17 at the west. A seasonal change in above MSL volume indicates loss of sand during autumn and winter, and gain during spring and summer. Changes in MSL shoreline intercept and above MSL volume were highly variable during the study.

Computation of longshore energy flux using LEO current observations /

"March 1980."

Analysis of cross-shore movement of natural longshore bars and material placed to create longshore bars /

At head of title: "Dredging Research Program."

Transformation of monochromatic waves from deep to shallow water /

"August 1980."

Heavy minerals in beach and stream sediments as indicators of shore processes between Monterey and Los Angeles, California /

"November 1970."

Engineering and ecological evaluation of artificial-island design, Rincon Island, Punta Gorda, California /

"March 1974."

Surf observations and longshore current prediction /

"November 1975."

Valeriemaya seagriefii; Delesseriaceae

Valeriemaya seagriefii O.De Clerck, M.J.Wynne, & H.Stegenga

Spongomorpha conjuncta; Acrosiphoniaceae

Spongomorpha conjuncta Taylor

Coastal changes, eastern Lake Michigan, 1970-1973 /

"October 1976."

Longshore sand transport study at Channel Islands Harbor, California /

"April 1981."

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.

A model study of the effect of submerged breakwaters on wave action /

Mode of access: Internet.

Accretion of beach sand behind a detached breakwater.

Mode of access: Internet.