Accession Number : AD0786237

Title :   Beach Processes on the Oregon Coast, Jul 1973.

Descriptive Note : Technical rept.,

Corporate Author : WILLIAMS COLL WILLIAMSTOWN MASS

Personal Author(s) : Fox,William T. ; Davis,Richard A. , Jr

Report Date : 30 AUG 1974

Pagination or Media Count : 89

Abstract : During July and August, 1973, a 45-day time-series study was undertaken on the central Oregon coast to relate weather and wave conditions to beach erosion and sand bar migration. The summer weather pattern was dominated by the East-Pacific subtropical high which produced winds and waves from the northwest and extended periods of upwelling and coastal fog. When low pressure systems moved through, wind and waves shifted to the southwest. Three beaches were mapped at low tide to show changes in beach and bar morphology through time. At South Beach, Oregon two sets of bars with intervening rip channels advanced shoreward at 1 to 5 meters/day and southward at 10 to 15 meters/day. At Beverly Beach, Oregon, a basalt ridge 700 meters offshore resulted in wave diffraction and sand deposition in the central portion of the beach. A rip channel at the south end of the beach moved 300 meters to the south. At Gleneden Beach, cusps 40 meters long were cut into the steep foreshore. (Modified author abstract)

Descriptors :   *Beach erosion, *Ocean waves, *Oregon, Time series analysis, Sand, Wind, Upwelling, Fog, Ocean currents, Tides, Morphology, Topography, Coastal regions, Basalt

Subject Categories : Physical and Dynamic Oceanography
      Civil Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE