. Collected reprints / Atlantic Oceanographic and Meteorological Laboratories [and] Pacific Oceanographic Laboratories. Oceanography « v. 1645. KILOMETERS FIGURE 9. Retreat of the Delaware coast, based on Coast and Geodetic Survey records and a survey by Moody. From Moody (1964). reason to doubt the applicability of the conventional wave-grading model to the upper shoreface, even if we cannot yet present this model in a quantitative manner. Upper shoreface textures and slopes are time-averaged responses to two opposing mechanisms, the seaward flux of suspended sand in ri
. Collected reprints / Atlantic Oceanographic and Meteorological Laboratories [and] Pacific Oceanographic Laboratories. Oceanography « v. 1645. KILOMETERS FIGURE 9. Retreat of the Delaware coast, based on Coast and Geodetic Survey records and a survey by Moody. From Moody (1964). reason to doubt the applicability of the conventional wave-grading model to the upper shoreface, even if we cannot yet present this model in a quantitative manner. Upper shoreface textures and slopes are time-averaged responses to two opposing mechanisms, the seaward flux of suspended sand in rip currents on one hand, and the landward creep of bottom sand in response to the net landward sense of bottom wave surge on the other hand. The upper shoreface profile varies in cyclic fashion, with storage of sand mainly on the beach during the fair- weather summer season, and storage of sand mainly on the upper shoreface during the winter. For long periods of time, the upper shoreface profile may oscillate about the ideal wave-graded configuration. During major storms, however, the upper shoreface system of wave-driven longshore sand flux interacts with coastal boundary of the storm flow field. Sand eroded from the beach and bar by storm waves passes seaward 480. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Atlantic Oceanographic and Meteorological Laboratories; Pacific Oceanographic Laboratories; United States. Environmental Science Services Administration. Research Laboratories; Environmental Research Laboratories (U. S. ). Washington, D. C. : U. S. Dept. of Commerce, Environmental Science Services Administration, Research Laboratories : For sale by Supt. of Docs. U. S. G. P. O.
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